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Sep 22, 2013
09/13
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Ian Smail
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I discuss our current understanding of the properties and nature of high redshift, far-infrared luminous galaxies selected through their observed-frame submillimeter emission.
Source: http://arxiv.org/abs/astro-ph/0603635v1
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Sep 20, 2013
09/13
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Alan Dressler; Ian Smail
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The ``MORPHS'' group has completed the cataloging, parameterization, and morphological classification of ~2000 galaxies in 10 rich clusters from 0.36 < z < 0.56. From a weak lensing analysis using these data, which compares the X-ray properties (L_X) of the clusters with virial temperature estimates (T_v) from the lensing shear strength, we find little evidence for evolution in the L_X-T_v relation from that observed for local clusters. We discuss how this observation constrains models...
Source: http://arxiv.org/abs/astro-ph/9611004v2
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Sep 18, 2013
09/13
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Ian Smail; Mark Dickinson
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We present the detection of weak gravitational lensing in the field of the radio galaxy 3C324 (z=1.206) using deep HST imaging. ~From an analysis of the shapes of faint R=24.5-27.5 galaxies in the field we measure a weak, coherent distortion centered close to the radio source. This shear field most likely arises from gravitational lensing of distant field galaxies by a foreground mass concentration. In the light of previous observations of this region, which indicate the presence of a rich...
Source: http://arxiv.org/abs/astro-ph/9510050v1
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Sep 18, 2013
09/13
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Tadayuki Kodama; Ian Smail
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Hubble Space Telescope observations of distant clusters have suggested a steep increase in the proportion of S0 galaxies between clusters at high redshifts and similar systems the present-day. It has been proposed that this increase results from the transformation of the morphologies of accreted field galaxies from spirals to S0s. We have simulated the evolution of the morphological mix in clusters based on a simple phenomenological model where the clusters accrete a mix of galaxies from the...
Source: http://arxiv.org/abs/astro-ph/0008139v2
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Sep 21, 2013
09/13
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N. M Christopher; Ian Smail
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We present a multicolour catalogue of faint galaxies situated close to bright stars, V 2.0 consistent with them lying at high-redshifts, z~2. These 12 very red galaxies have K-band magnitudes of K=18.1-20.1 and separations from the guide stars of 4-20" and hence are very well-suited to adaptive optics studies to investigate their morphologies and spectral properties on sub-kpc scales. We provide coordinates and JHK photometry for all catalogued objects.
Source: http://arxiv.org/abs/astro-ph/0508400v1
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Jul 20, 2013
07/13
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Tereasa G. Brainerd; Ian Smail
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The angular clustering of faint field galaxies is investigated using deep imaging (I~25) obtained with the 10-m Keck-I telescope. The autocorrelation function is consistent with w(theta) ~ theta^-0.8 and, although less steep correlation functions cannot be ruled out with high confidence, we find no compelling evidence for a systematic decrease in the power law index at the faintest magnitude limits. Results from a number of independent observational studies are combined in order to investigate...
Source: http://arxiv.org/abs/astro-ph/9712276v1
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Sep 22, 2013
09/13
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Richard G. Bower; Ian Smail
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In this paper we present weak lensing observations of the fields around 8 z~1 luminous radio sources. These data are searched for the lensing signatures of clusters that are either physically associated with the radio objects, or are foreground systems projected along the line of sight. The radio sources were all imaged with WFPC-2/HST providing high quality shape information on large numbers of faint galaxies around them. Statistical analysis of the coherent shear field visible in the shapes...
Source: http://arxiv.org/abs/astro-ph/9612151v1
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Sep 22, 2013
09/13
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Tereasa Brainerd; Roger Blandford; Ian Smail
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We report a significant detection of weak, tangential distortion of the images of cosmologically distant, faint galaxies due to gravitational lensing by foreground galaxies. A mean image polarisation of $ =0.011\pm 0.006$ is measured for 3202 pairs of source galaxies with magnitudes $23 < r \le 24$ and lens galaxies with magnitudes $20\le r\le 23$. The signal remains strong for lens-source separations $\lo 90''$, consistent with quasi-isothermal galaxy halos extending to large radii ($\go...
Source: http://arxiv.org/abs/astro-ph/9503073v1
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Sep 17, 2013
09/13
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Priyamvada Natarajan; Jean-Paul Kneib; Ian Smail
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In this letter, we present the results of our study of galaxy-galaxy lensing in massive cluster-lenses spanning $z = 0.17$ to 0.58, utilizing high-quality archival {\it Hubble Space Telescope} ({\it HST}) data. Local anisotropies in the shear maps are assumed to arise from dark matter substructure within these clusters. Associating the substructure with bright early-type cluster galaxies, we quantify the properties of typical $L^*$ cluster members in a statistical fashion. The fraction of total...
Source: http://arxiv.org/abs/astro-ph/0207049v2
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Sep 23, 2013
09/13
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Priyamvada Natarajan; Jean-Paul Kneib; Ian Smail
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A synopsis of the recent results from our study of galaxy-galaxy lensing in clusters is presented. We have applied our analysis techniques to the sample of HST cluster-lenses that span a redshift range from redshift 0.18 to 0.58. We find that there is evidence that the total mass of a typical early-type cluster galaxy increases with redshift. For the lowest redshift bin, a sensible comparison can be made with field galaxies and it is found that cluster galaxies are less massive and less...
Source: http://arxiv.org/abs/astro-ph/9909349v1
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Sep 21, 2013
09/13
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Lewis Jones; Ian Smail; Warrick J. Couch
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We combine morphological classifications from deep HST imaging of a sample of 3 clusters at z=0.31 and a further 9 clusters at z=0.37-0.56 with existing spectroscopic observations of their E and S0 populations, to study the relative spectral properties of these two galaxy types. We have also used similar data for the Coma cluster as a present day bench-mark with which to compare our data at higher redshift. The data span the range where strong evolution is claimed in the proportion of S0...
Source: http://arxiv.org/abs/astro-ph/9907423v1
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Sep 21, 2013
09/13
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Ian Smail; Scott Chapman; Andrew Blain; Rob Ivison
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We discuss recent advances in the study of dusty, massive galaxies at z>1 arising from the first extensive spectroscopic surveys.
Source: http://arxiv.org/abs/astro-ph/0311285v1
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Sep 18, 2013
09/13
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A W Blain; R J Ivison; Ian Smail
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The first observations to detect a population of distant galaxies directly in the submillimetre waveband have recently been made using the new Submillimetre Common-User Bolometer Array (SCUBA) on the James Clerk Maxwell Telescope (JCMT). The results indicate that a large number of distant galaxies are radiating strongly in this waveband. Here we discuss their significance for source confusion in future millimetre/submillimetre-wave observations of both distant galaxies and cosmic microwave...
Source: http://arxiv.org/abs/astro-ph/9710003v3
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Sep 22, 2013
09/13
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Ian Smail; R. J. Ivison; A. W. Blain
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We present the first results of a sub-millimeter survey of distant clusters using the new Sub-mm Common-User Bolometer Array (SCUBA) on the James Clerk Maxwell Telescope. We have mapped fields in two massive, concentrated clusters, A370 at z=0.37 and Cl2244-02 at z=0.33, at wavelengths of 450 and 850-um. The resulting continuum maps cover a total area of about 10 sq. arcmin to 1 sigma noise levels less than 14 and 2 mJy per beam at the two wavelengths, 2-3 orders of magnitude deeper than was...
Source: http://arxiv.org/abs/astro-ph/9708135v2
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Sep 20, 2013
09/13
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Ian Smail; Richard S. Ellis; Michael J. Fitchett
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{}From deep optical images of three clusters selected by virtue of their X-ray luminosity and/or optical richness (1455+22; $z=0.26$, 0016+16; $z=0.55$ and 1603+43; $z=0.89$), we construct statistically-complete samples of faint field galaxies ($I \leq 25$) suitable for probing the effects of gravitational lensing. By selecting clusters across a wide redshift range we separate the effects of the mean redshift distribution of the faint field population well beyond spectroscopic limits and the...
Source: http://arxiv.org/abs/astro-ph/9402048v1
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Sep 19, 2013
09/13
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Tereasa G. Brainerd; Ian Smail; Jeremy R. Mould
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We present results for the two-point angular correlation function of galaxies to a limiting magnitude of r=26. The final sample is 97% complete to r=26.0, yielding 5730 galaxies over a 90.1 sq. arcmin field. The correlation function for our faint galaxies can be parameterised by a power law, $A \theta^{-0.8}$, in agreement with the clustering statistics of shallower catalogues. The derived amplitude, $A$, is small, but non-zero. We combine this measurement with the latest statistical...
Source: http://arxiv.org/abs/astro-ph/9405074v1
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Sep 20, 2013
09/13
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Ian Smail; G. P. Smith; R. J. Ivison
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We discuss the properties of the bright submillimeter source SMMJ14011+0252 at z=2.56 which lies behind the central regions of the z=0.25 lensing cluster A1835. This system has a complex optical morphology consisting of at least five separate components. We reassess the extensive multiwavelength observations of this system and find strong support for the suggestion that one of these five components represents a foreground galaxy. The spectral and morphological properties of the foreground...
Source: http://arxiv.org/abs/astro-ph/0506176v1
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Sep 20, 2013
09/13
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Ian Smail; Rob Ivison; Andrew Blain; Jean-Paul Kneib
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We review published deep surveys in the submillimeter (sub-mm) regime from the new Sub-millimetre Common User Bolometer Array (SCUBA) on the 15-m James Clerk Maxwell Telescope (JCMT), Mauna Kea, Hawaii. Summarising the number counts of faint sub-mm sources determined from the different surveys we show that the deepest counts from our completed SCUBA Lens Survey, down to 0.5mJy at 850um fully account for the far-infrared background (FIRB) detected by COBE. We conclude that a population of...
Source: http://arxiv.org/abs/astro-ph/9810281v1
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Sep 18, 2013
09/13
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Ian Smail; Rob Ivison; Andrew Blain; Jean-Paul Kneib
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We summarise the main results on the faint submillimeter (submm) galaxy population which have come from the SCUBA Cluster Lens Survey. We detail our current understanding of the characteristics of these submm-selected galaxies across wavebands from X-rays to radio. After presenting the main observational properties of this population we conclude by discussing the nature of these distant, ultraluminous infrared galaxies and their relationship to other high-redshift populations.
Source: http://arxiv.org/abs/astro-ph/0008237v1
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Sep 19, 2013
09/13
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Ian Smail; David W. Hogg; Lin Yan; Judy Cohen
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We present faint galaxy counts from deep $VRI$ images obtained with the Keck Telescope. These images reach $R\sim27$ in median seeing FWHM $\sim 0.5$--0.6 arcsec and we detect a integrated galaxy number density of $7\times 10^{5}$ degree$^{-2}$, equivalent to $3\times 10^{10}$ galaxies in the observable Universe. In addition we present median galaxy colors as a function of magnitude; bluing trends are visible in all colors to $R\sim 24.5$. Fainter than $R\sim24.5$, however, the typical \VR\...
Source: http://arxiv.org/abs/astro-ph/9506095v1
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Sep 17, 2013
09/13
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Priyamvada Natarajan; Abraham Loeb; Jean-Paul Kneib; Ian Smail
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The detailed distribution of mass within clusters of galaxies can be used to probe the nature of dark matter. We show that constraints on the extent of the mass distribution around galaxies in the rich cluster Abell 2218 obtained from combining strong and weak lensing observations are consistent with the predictions which assume that the dominant mass component (dark matter) in these halos is collisionless. A strongly interacting (fluid-like) dark matter is ruled-out at a confidence level of...
Source: http://arxiv.org/abs/astro-ph/0207045v2
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Sep 23, 2013
09/13
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Priyamvada Natarajan; Jean-Paul Kneib; Ian Smail; Richard Ellis
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We present high-resolution mass reconstructions for five massive cluster-lenses spanning a redshift range from z = 0.18 - 0.57 utilizing archival Hubble Space Telescope data and applying galaxy-galaxy lensing techniques. These detailed mass models were obtained by combining constraints from the observed strong and weak lensing regimes. Quantifying the local weak distortions in the shear maps in terms of perturbations induced by the presence of galaxy halos around individual bright early-type...
Source: http://arxiv.org/abs/astro-ph/0411426v1
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Sep 23, 2013
09/13
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Andrew W. Blain; Rob Ivison; Jean-Paul Kneib; Ian Smail
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Surveys of the distant Universe have been made using the SCUBA submillimeter(submm)-wave camera at the JCMT. 450- and 850-micron data is taken simultaneously by SCUBA in the same 5-square-arcmin field. Deep 850-micron counts of high-redshift dusty galaxies have been published; however, at 450 microns both the atmospheric transmission and antenna efficiency are lower, and the atmospheric noise is higher, and so only upper limits to the 450-micron counts have been reported so far. Here we apply...
Source: http://arxiv.org/abs/astro-ph/9908024v1
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Sep 21, 2013
09/13
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David Sobral; Philip Best; Ian Smail; Jim Geach; HiZELS team
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At z=0, clusters are primarily populated by red, elliptical and massive galaxies, while blue, spiral and lower-mass galaxies are common in low-density environments. Understanding how and when these differences were established is of absolute importance for our understanding of galaxy formation and evolution, but results at high-z remain contradictory. By taking advantage of the widest and deepest H-alpha narrow-band survey at z=0.84 over the COSMOS and UKIDSS UDS fields, probing a wide range of...
Source: http://arxiv.org/abs/1011.4753v1
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Sep 20, 2013
09/13
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Andrew W. Blain; Scott S. Chapman; Ian Smail; Rob Ivison
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eye 40
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Using accurate positions from very deep radio observations to guide multi-object Keck spectroscopy, we have determined a substantially complete redshift distribution for very luminous, distant submillimeter(submm)-selected galaxies (SMGs). A sample of 73 redshifts for SMGs in 7 fields contains a surprisingly large number of `associations': systems of SMGs with Mpc-scale separations, and redshifts within 1200 km/s. This sample provides tentative evidence of strong clustering of SMGs at redshifts...
Source: http://arxiv.org/abs/astro-ph/0405035v2
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Sep 22, 2013
09/13
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David G. Gilbank; Ian Smail; R. J. Ivison; C. Packham
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We present the results from a survey for Extremely Red Objects (EROs) in deep, high resolution optical images taken from the Hubble Space Telescope (HST) Medium Deep Survey. We have surveyed 35 deep F814W HST/WFPC2 fields in the near-infrared to a typical depth of K~20. From a total area of 206 arcmin^2 and to a limit of K=20.0 we identify 224 EROs ((1.14+/-0.08) arcmin^-2) with (I_{814}-K)=>4.0 and 83 ((0.41+/-0.05) arcmin^-2) with (I_{814}-K)=>5.0. We find that the slope of the number...
Source: http://arxiv.org/abs/astro-ph/0308318v1
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Sep 23, 2013
09/13
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Andrew W. Blain; Ian Smail; Rob Ivison; Jean-Paul Kneib
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eye 42
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The first generation of submillimeter(submm)-wave surveys are being carried out using the 450/850-micron SCUBA camera at the JCMT on Mauna Kea. These surveys are potentially sensitive to galaxies at very high redshift, and the galaxies that have been detected so far appear to contribute the greater fraction of the mm/submm-wave background radiation intensity measured by COBE. In order to understand this new population of galaxies, individual examples must be studied in detail across many...
Source: http://arxiv.org/abs/astro-ph/9908111v1
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Sep 23, 2013
09/13
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Tadayuki Kodama; Michael Balogh; Ian Smail; Richard Bower; Fumiaki Nakata
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We employ panoramic, multicolour (BRz') and narrow-band Halpha imaging of the cluster Cl0024.0+1652 (z=0.39) from Subaru covering a ~30 arcmin field, to determine cluster membership and star formation rates for a large sample of galaxies across a wide field in the cluster, ~10 Mpc. We detect over 500 galaxies in narrow-band emission, with broad-band colours consistent with them lying at z~0.39. Using this sample we determine the Halpha luminosity function within the cluster and find that its...
Source: http://arxiv.org/abs/astro-ph/0408037v3
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Sep 17, 2013
09/13
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Mark Sullivan; Richard Ellis; Peter Nugent; Ian Smail; Piero Madau
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Distant Type Ia and II supernovae (SNe) can serve as valuable probes of the history of the cosmic expansion and star formation, and provide important information on their progenitor models. At present, however, there are few observational constraints on the abundance of SNe at high redshifts. A major science driver for the Next Generation Space Telescope (NGST) is the study of such very distant supernovae. In this paper we discuss strategies for finding and counting distant SNe by using repeat...
Source: http://arxiv.org/abs/astro-ph/0007228v2
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Sep 21, 2013
09/13
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Ian Smail; A. M. Swinbank; R. J. Ivison; E. Ibar
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We investigate whether strong molecular and atomic emission lines at far-infrared wavelengths can influence the identification and derived properties of galaxies selected from broad-band, far-infrared or submillimetre observations. Several of these lines, e.g. [CII]158um, have been found to be very bright in some high-redshift galaxies, with fluxes of >0.1-1% of the total far-infrared luminosity, and may be even brighter in certain populations at high redshifts. At redshifts where these...
Source: http://arxiv.org/abs/1104.1758v1
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Sep 22, 2013
09/13
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Richard Townsend; Rob Ivison; Ian Smail; Andrew Blain; David Frayer
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We discuss the possibility of using OH and H2O gigamasers to trace the redshift distribution of luminous, dust-obscured, star-forming galaxies. It has long been thought that ultraluminous, interacting galaxies should host gigamasers due to their vast pumping IR luminosity, the large column density of molecules available to populate the maser states and the turbulent motion of the gas in these dynamically complex systems which allows unsaturated maser emission. OH masers may thus be well-suited...
Source: http://arxiv.org/abs/astro-ph/0106112v2
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Sep 20, 2013
09/13
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Andrew W. Blain; Scott C. Chapman; Ian Smail; Rob Ivison
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The spectral energy distributions (SEDs) of dust-enshrouded galaxies with powerful restframe far-infrared emission have been constrained by a range of ground-based and space-borne surveys. The IRAS catalog provides a reasonably complete picture of the dust emission from nearby galaxies (at redshifts of order 0.1) that are typically less luminous than about 10 to the 12 solar luminosities. However, at higher redshifts, the observational coverage from all existing far-IR and submillimeter surveys...
Source: http://arxiv.org/abs/astro-ph/0404438v2
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Sep 20, 2013
09/13
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Gillian Wilson; Ian Smail; Richard S. Ellis; Warrick J. Couch
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We present deep two-colour photometry of two rich clusters at z=0.18, A665 and A1689. We use these data to construct number counts as a function of magnitude in the two fields. By combining these counts with similar observations from a large area field survey we subtract the field contamination statistically to produce luminosity functions for the two clusters. Great care has been taken to achieve agreement between the photometry of these two samples. The cluster data are complete to a limiting...
Source: http://arxiv.org/abs/astro-ph/9610199v2
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Sep 19, 2013
09/13
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Andrew W. Blain; Jean-Paul Kneib; R. J. Ivison; Ian Smail
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We present the counts of luminous submillimeter (sub-mm) galaxies from an analysis of our survey of the distant Universe through lensing clusters, which uses massive cluster lenses with well-constrained mass models to magnify the background sky. This both increases the sensitivity and reduces the effects of source confusion. Accurate lens models are used to correct the observed sub-mm source counts. The associated uncertainties do not dominate the final errors. We derive counts by two...
Source: http://arxiv.org/abs/astro-ph/9812412v2
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Sep 18, 2013
09/13
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Rob Ivison; Ian Smail; David Frayer; Jean-Paul Kneib; Andrew Blain
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eye 57
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We present new, multi-wavelength, high-resolution imaging of the luminous, submillimeter galaxy, SMM J14011+0252, an interacting starburst at z = 2.56. Our observations comprise optical imaging from the HST, sensitive radio mapping from the VLA and CO observations from OVRO and BIMA. Aided by well-constrained gravitational amplification, we use these new data to map the distribution of gas and both obscured and unobscured starlight. The maps show that the gas and star formation are extended on...
Source: http://arxiv.org/abs/astro-ph/0110085v1
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Sep 20, 2013
09/13
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S. C. Chapman; Ian Smail; R. J. Ivison; A. W. Blain
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Spectroscopic surveys of luminous submillimetre-selected sources have uncovered optically-bright galaxies at z
Source: http://arxiv.org/abs/astro-ph/0204086v1
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Jul 20, 2013
07/13
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S. C. Chapman; Ian Smail; A. W. Blain; R. J. Ivison
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We report spectroscopic redshifts for 18 microJy-radio galaxies at mean redshift of z=2.2 that are faint at both submmillimeter (submm) and optical wavelengths. While the radio fluxes of these galaxies could indicate far-infrared (far-IR) luminosities comparable to high-redshift submillimeter-selected galaxies (>10^12 Lsun), none are detected in the submm. We propose that this new population of galaxies represents an extension of the high-redshift submm galaxy population, but with hotter...
Source: http://arxiv.org/abs/astro-ph/0406596v2
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Sep 24, 2013
09/13
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S. C. Chapman; A. W. Blain; Ian Smail; R. J. Ivison
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We have obtained spectroscopic redshifts using the Keck-I telescope for a sample of 73 submillimeter (submm) galaxies for which precise positions are available. The galaxies lie at redshifts out to z=3.6, with a median redshift of 2.2. The dust-corrected ultraviolet (UV) luminosities of the galaxies rarely hint at their huge bolometric luminosities indicated by their radio/submm emission, underestimating the true luminosity by a median factor of ~100 for SMGs with pure starburst spectra. The...
Source: http://arxiv.org/abs/astro-ph/0412573v3
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Sep 23, 2013
09/13
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A. W. Blain; R. J. Ivison; Ian Smail; J. -P. Kneib
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The flux density from undetected sources in the observing beam of a telescope produces source confusion noise in the resulting maps of the sky, and thus limits sensitivity. In a recent paper we discussed this effect in the millimetre/submillimetre waveband, using a simple model of galaxy evolution that could account for the gravitationally lensed images of distant dusty galaxies newly discovered in the fields of clusters of galaxies. New models explain all the available mm, submm and...
Source: http://arxiv.org/abs/astro-ph/9806063v1
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Jul 20, 2013
07/13
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Ian Smail; Rob Ivison; Andrew Blain; Jean-Paul Kneib; Frazer Owen
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We discuss deep surveys in the submm regime using the SCUBA bolometer array on the JCMT. At 850um SCUBA has resolved the bulk of the submm background (SMBR) detected by COBE into discrete sources brighter than 0.5mJy. The on-going identification and characterisation of this population at other wavelengths suggests that the bulk of the submm sources brighter than ~1mJy lie at z>1, with a median redshift for the population of ~2-3. The optical/near-infrared properties of the counterparts to...
Source: http://arxiv.org/abs/astro-ph/9906196v1
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Sep 23, 2013
09/13
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Masao Hayashi; David Sobral; Philip N. Best; Ian Smail; Tadayuki Kodama
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We investigate the relationship between H\alpha\ and [OII](\lambda 3727) emission in faint star-forming galaxies at z=1.47 with dust uncorrected star formation rates (SFRs) down to 1.4 Msun/yr, using data in two narrow-bands from WFCAM/UKIRT and Suprime-Cam/Subaru. A stacking analysis allows us to investigate H\alpha\ emission flux from bright [OII] emitters as well as faint ones for which H\alpha\ is not individually detected, and to compare them with a large sample of local galaxies. We find...
Source: http://arxiv.org/abs/1212.4905v1
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Sep 18, 2013
09/13
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Tadayuki Kodama; Ian Smail; F. Nakata; S. Okamura; R. G. Bower
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We present deep, panoramic multi-color imaging of the distant rich cluster A851 (Cl0939+4713, z=0.41) using Suprime-Cam on Subaru. These images cover a 27' field of view, ~11 Mpc at z=0.41, and by exploiting photometric redshifts estimated from our BVRI imaging we can isolate galaxies in a narrow redshift slice at the cluster redshift. Using a sample of ~2700 probable cluster members brighter than 0.02 Lv*, we trace the network of filaments and subclumps around the cluster core. The depth of...
Source: http://arxiv.org/abs/astro-ph/0110354v1
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Sep 22, 2013
09/13
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Ian Smail; Katherine M. Blundell; B. D. Lehmer; D. M. Alexander
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We report the detection of extended X-ray emission around two powerful high-z radio galaxies (HzRGs) at z~3.6 (4C03.24 & 4C19.71) and use these to investigate the origin of extended, Inverse Compton (IC) powered X-ray halos at high z. The halos have X-ray luminosities of Lx~3e44 erg/s and sizes of ~60kpc. Their morphologies are broadly similar to the ~60-kpc long radio lobes around these galaxies suggesting they are formed from IC scattering by relativistic electrons in the radio lobes, of...
Source: http://arxiv.org/abs/1210.4548v1
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Sep 19, 2013
09/13
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Ian Smail; Warrick J. Couch; Richard S. Ellis; Ray M. Sharples
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Deep Hubble Space Telescope images of superlative resolution obtained for the distant rich cluster AC114 (z=0.31) reveal a variety of gravitational lensing phenomena for which ground-based spectroscopy is available. We present a luminous arc which is clearly resolved by HST and appears to be a lensed z=0.64 sub-L star spiral galaxy with a detected rotation curve. Of greatest interest is a remarkably symmetrical pair of compact blue images separated by 10 arcsec and lying close to the cluster...
Source: http://arxiv.org/abs/astro-ph/9405023v1
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Sep 23, 2013
09/13
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Ian Smail; R. J. Ivison; A. W. Blain; J. -P. Kneib
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We present optical morphologies obtained from deep HST and ground-based images for galaxies selected from the first sub-millimeter survey of the distant Universe. Our sample comprises galaxies detected in deep 850-micron continuum maps of seven massive clusters, obtained using SCUBA, the new bolometer camera on the JCMT. The survey covers a total area of 0.01 square degrees to 1-sigma noise levels of about 2 mJy/beam. We detect a total of 25 sources at 850 microns, of which 17 and 10 are...
Source: http://arxiv.org/abs/astro-ph/9806061v1
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48
Sep 23, 2013
09/13
by
A. W. Blain; Ian Smail; R. J. Ivison; J. -P. Kneib
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A population of distant dusty galaxies emitting in the submillimetre waveband has recently been detected using the Submillimetre Common-User Bolometer Array (SCUBA) camera on the James Clerk Maxwell Telescope (JCMT). This population can be used to trace the amount of high-redshift star-formation activity that is obscured from view in the optical waveband by dust, and so is missing from existing inventories of star formation in the distant Universe. By including this population we can construct...
Source: http://arxiv.org/abs/astro-ph/9806062v5
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51
Sep 24, 2013
09/13
by
Ian Smail; S. C. Chapman; A. W. Blain; R. J. Ivison
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We present optical and near-IR photometry of 96 dusty, far-IR luminous galaxies. We have precise spectroscopic redshifts for all these galaxies yielding a median redshift of z=2.2. The majority, 78, are submm-detected galaxies lying at z=0.2-3.6, while the remaining 18 are optically-faint uJy radio galaxies at z=0.9-3.4 which are proposed to be similarly luminous, dusty galaxies whose dust emission is too hot to be detected in the submm. We compare the photometric and morphological properties...
Source: http://arxiv.org/abs/astro-ph/0412574v1
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61
Sep 18, 2013
09/13
by
Rob Ivison; Ian Smail; Andrew Blain; Jean-Paul Kneib; David Frayer
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We discuss observations of the submm-selected galaxy, SMM J02399-0136, and what has been learnt about it during the year following its discovery. SMM J02399-0136 was the first distant galaxy detected in submm surveys with SCUBA. Its association with a massive, gas-rich starburst/AGN at z=2.8 has lead to suggestions that the prevalence of AGN in the early Universe may be high and that these AGN may account for a significant fraction of the far-IR background.
Source: http://arxiv.org/abs/astro-ph/9901361v1
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60
Sep 19, 2013
09/13
by
S. C. Chapman; A. W. Blain; R. J. Ivison; Ian Smail
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eye 60
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A significant fraction of the energy emitted in the early Universe came from very luminous galaxies that are largely hidden at optical wavelengths (because of interstellar dust grains); this energy now forms part of the cosmic background radiation at wavelengths near 1mm. These submillimetre (submm) galaxies were resolved from the background in 1997 but have been difficult to identify and study due to the poor spatial resolution of submm instruments. This has impeded the determination of their...
Source: http://arxiv.org/abs/astro-ph/0304235v1
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Sep 22, 2013
09/13
by
Ian Smail; Alastair C. Edge; Richard S. Ellis; Roger D. Blandford
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We present a deep UBI CCD survey using the Palomar 5-m telescope of a sample of high X-ray luminosity, distant clusters selected from the ROSAT All-Sky Survey. The 10 clusters lie at z=0.22-0.28, an era where evolutionary effects have been reported in the properties of cluster galaxy populations. Our clusters thus provide a well-defined sample of the most massive systems at these redshifts to quantify the extent and variability of these evolutionary effects. Moreover, by concentrating on a...
Source: http://arxiv.org/abs/astro-ph/9707231v1
