34
34
Sep 20, 2013
09/13
by
E. Le Floc'h; the MIPS team
texts
eye 34
favorite 0
comment 0
The combination of both contributions from the observed UV emission and the absorbed radiations reprocessed in the infrared represents the ideal approach to constrain the activity of massive star formation in galaxies. Using recent results from GALEX and Spitzer, we compare the evolutions of the UV and IR energy densities with redshift as well as their contributions to the star formation history at 0 10^11 L_sol).
Source: http://arxiv.org/abs/astro-ph/0506463v1
43
43
Sep 18, 2013
09/13
by
J. Melbourne; D. C. Koo; E. Le Floc'h
texts
eye 43
favorite 0
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We combine optical morphologies and photometry from HST, redshifts from Keck, and mid-infrared luminosities from Spitzer for an optically selected sample of~800 galaxies in GOODS-N to track morphology evolution of infrared luminous galaxies (LIRGs) since redshift z=1. We find a 50% decline in the number of LIRGs from z~1 to lower redshift, in agreement with previous studies. In addition, there is evidence for a morphological evolution of the populations of LIRGs. Above z=0.5, roughly half of...
Source: http://arxiv.org/abs/astro-ph/0509037v1
51
51
Sep 21, 2013
09/13
by
V. Charmandaris; E. Le Floc'h; I. F. Mirabel
texts
eye 51
favorite 0
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We present evidence for the dramatically different morphology between the rest frame UV and 7micron mid-IR emission of VV114 and Arp299, two nearby (z~0) violently interacting infrared luminous galaxies (LIRGs). Nearly all LIRGs are interacting systems and it is currently accepted that they dominate the IR emission at z>1. Luminous IR galaxies located at z=1-2 could easily be detected as unresolved sources in deep optical/near-IR ground based surveys, as well as in upcoming 24micron surveys...
Source: http://arxiv.org/abs/astro-ph/0311632v1
54
54
Sep 22, 2013
09/13
by
I. F. Mirabel; D. B. Sanders; E. Le Floc'h
texts
eye 54
favorite 0
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Present knowledge indicates that gamma-ray bursts are linked with massive stars. They will become invaluable probes of the early universe and galaxy formation. In the future, it will be possible to use gamma-ray bursts for two purposes: 1) to probe the history of massive star formation in the Universe by the rate of occurence of gamma-ray bursts, and 2) for the study of galaxy evolution at all lookback times by determining the nature of the galaxy hosts. Because gamma-rays are not attenuated by...
Source: http://arxiv.org/abs/astro-ph/0004022v1
40
40
Sep 18, 2013
09/13
by
D. Elbaz; E. Le Floc'h; H. Dole; D. Marcillac
texts
eye 40
favorite 0
comment 0
We present ISOCAM 15 micron and MIPS 24 micron photometry of a sample of 16 distant Luminous Infrared Galaxies (LIRGs) characterized by a median luminosity L(IR) 2x10^11 Lsol and redshift z = 0.7 (distributed from z = 0.1 to 1.2). While some sources display 24/15 micron flux ratios also consistent with a featureless continuum dominating their mid-infrared (MIR) spectral energy distributions (SEDs), the presence of prominent emission features such as the Polycyclic Aromatic Hydrocarbons is...
Source: http://arxiv.org/abs/astro-ph/0502569v1
42
42
Sep 19, 2013
09/13
by
J. R. Houck; D. W. Weedman; E. Le Floc'h; Lei Hao
texts
eye 42
favorite 0
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A complete flux-limited sample of 50 galaxies is presented having f_{\nu}(24um) > 10mJy, chosen from a survey with the Multiband Imaging Photometer on Spitzer (MIPS) of 8.2 deg^{2} within the NOAO Deep Wide-Field Survey region in Bootes (NDWFS). Spectra obtained with the low-resolution modules of the Infrared Spectrograph on Spitzer (IRS) are described for 36 galaxies within this sample; 25 show strong PAH emission features characteristic of starbursts, and 11 show silicate absorption or...
Source: http://arxiv.org/abs/0708.2400v1
50
50
Sep 18, 2013
09/13
by
L. Vanzi; S. Bagnulo; E. Le Floc'h; R. Maiolino; E. Pompei; W. Walsh
texts
eye 50
favorite 0
comment 0
We present observations in the optical, near-infrared and millimetre bands of the Ultraluminous Infrared galaxy IRAS 19254-7245, also known as "The Superantennae". This galaxy is an interacting system with a double nucleus and long tails extending for about 350 kpc. We studied in detail the southern component of the system which is optically classified as a Sy2 galaxy. We have developed a method to determine the parameters of the emission lines in a spectrum in the case of multiple...
Source: http://arxiv.org/abs/astro-ph/0202435v1
51
51
Sep 20, 2013
09/13
by
E. Le Floc'h; V. Charmandaris; W. J. Forrest; F. Mirabel; L. Armus; D. Devost
texts
eye 51
favorite 0
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We report on the first mid-infrared observations of 16 GRB host galaxies performed with the Spitzer Space Telescope, and investigate the presence of evolved stellar populations and dust-enshrouded star-forming activity associated with GRBs. Only a very small fraction of our sample is detected by Spitzer, which is not consistent with recent works suggesting the presence of a GRB host population dominated by massive and strongly-starbursting galaxies (SFR > ~100 Msol/yr). Should the GRB hosts...
Source: http://arxiv.org/abs/astro-ph/0601252v1
38
38
Sep 22, 2013
09/13
by
O. Laurent; I. F. Mirabel; V. Charmandaris; E. Le Floc'h; D. Lutz; R. Genzel
texts
eye 38
favorite 0
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We present mid-IR observations of the prototypical Seyfert 2 galaxy NGC 1068 obtained with ISOCAM between 5 and 16micron. The proximity of this galaxy coupled with the spectro-imaging capabilities of the instrument allow us to separate the mid-IR emission of the active galactic nucleus (AGN) from the distinctly different emission of the circumnuclear star forming regions. The Unidentified Infrared Bands (UIBs), which trace the starburst contribution very well, are not detected in the spectrum...
Source: http://arxiv.org/abs/astro-ph/0003288v1
81
81
Sep 20, 2013
09/13
by
E. Le Floc'h; V. Charmandaris; W. J. Forrest; F. Mirabel; L. Armus; D. Devost
texts
eye 81
favorite 0
comment 0
We report on IRAC-4.5mic, IRAC-8.0mic and MIPS-24mic deep observations of 16 Gamma-Ray Burst (GRBs) host galaxies performed with the Spitzer Space Telescope, and we investigate in the thermal infrared the presence of evolved stellar populations and dust-enshrouded star-forming activity associated with these objects. Our sample is derived from GRBs that were identified with sub-arcsec localization between 1997 and 2001, and only a very small fraction (~20%) of the targeted sources is detected...
Source: http://arxiv.org/abs/astro-ph/0601251v1
97
97
Jul 20, 2013
07/13
by
F. Hammer; H. Flores; D. Schaerer; M. Dessauges-Zavadsky; E. Le Floc'h; M. Puech
texts
eye 97
favorite 0
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We have obtained deep spectroscopic observations of several nearby gamma-ray burst (GRB) host galaxies revealing for the first time the presence of Wolf-Rayet (WR) stars and numerous O stars located in rich and compact clusters or star forming regions. Surprisingly, high spatial resolution imaging shows that the GRBs and the associated supernovae did not occur in these regions, but several hundreds of parsec away. Considering various scenarios for GRB progenitors, we do not find any simple...
Source: http://arxiv.org/abs/astro-ph/0604461v1
178
178
Jul 22, 2013
07/13
by
L. Christensen; P. M. Vreeswijk; J. Sollerman; C. C. Thoene; E. Le Floc'h; K. Wiersema
texts
eye 178
favorite 0
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The collapsar model predicts that the progenitors of Gamma-ray Bursts (GRBs) are metal poor in Fe group elements. The existence of low metallicity stellar populations could manifest itself through special characteristics of the immediate environment of the GRB site in the host galaxy. We analyse the strong emission lines from the sub-luminous host galaxy of GRB 980425, which showed the first connection with a supernova explosion (SN 1998bw). The host has a sufficient size to allow detailed...
Source: http://arxiv.org/abs/0807.3554v2
49
49
Sep 21, 2013
09/13
by
N. Bavouzet; H. Dole; E. Le Floc'h; K. I. Caputi; G. Lagache; C. S. Kochanek
texts
eye 49
favorite 0
comment 0
We present the observed correlations between rest-frame 8, 24, 70 and 160 um monochromatic luminosities and measured total infrared luminosities L_IR of galaxies detected by Spitzer. Our sample consists of 372 star-forming galaxies with individual detections and flux measurements at 8, 24, 70 and 160 um. We have spectroscopic redshifts for 93% of these sources, and accurate photometric redshifts for the remainder. We also used a stacking analysis to measure the IR fluxes of fainter sources at...
Source: http://arxiv.org/abs/0712.0965v1
138
138
Jul 20, 2013
07/13
by
T. Bitsakis; V. Charmandaris; E. da Cunha; T. Diaz-Santos; E. Le Floc'h; G. Magdis
texts
eye 138
favorite 0
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We present a comprehensive study on the impact of the environment of compact galaxy groups on the evolution of their members using a multi-wavelength analysis, from the UV to the infrared, for a sample of 32 Hickson compact groups (HCGs) containing 135 galaxies. Fitting the SEDs of all galaxies with the state-of-the-art model of da Cunha (2008) we can accurately calculate their mass, SFR, and extinction, as well as estimate their infrared luminosity and dust content. We compare our findings...
Source: http://arxiv.org/abs/1107.3418v1
50
50
Sep 21, 2013
09/13
by
P. Gallais; V. Charmandaris; E. Le Floc'h; I. F. Mirabel; M. Sauvage; L. Vigroux; O. Laurent
texts
eye 50
favorite 0
comment 0
We present mid-infrared spectro-imaging (5 - 16 microns) observations of the infrared luminous interacting system Arp 299 (=Mrk171 =IC694+NGC3690) obtained with the ISOCAM instrument aboard ISO. Our observations show that nearly 40% of the total emission at 7 and 15 microns is diffuse, originating from the interacting disks of the galaxies. Moreover, they indicate the presence of large amounts of hot dust in the main infrared sources of the system and large extinctions toward the nuclei. While...
Source: http://arxiv.org/abs/astro-ph/0311154v1
36
36
Sep 23, 2013
09/13
by
D. W. Weedman; E. Le Floc'h; S. J. U. Higdon; J. L. Higdon; J. R. Houck
texts
eye 36
favorite 0
comment 0
Spectra have been obtained with the Infrared Spectrograph on the Spitzer Space Telescope for 18 optically faint sources (R > 23.9,mag) having f(nu) (24um) > 1.0,mJy and having radio detections at 20 cm to a limit of 115 microJy. Sources are within the Spitzer First Look Survey. Redshifts are determined for 14 sources from strong silicate absorption features (12 sources) or strong PAH emission features (2 sources), with median redshift of 2.1. Results confirm that optically faint sources...
Source: http://arxiv.org/abs/astro-ph/0510621v1
92
92
Sep 17, 2013
09/13
by
T. Bitsakis; V. Charmandaris; E. Le Floc'h; T. Diaz-Santos; S. K. Slater; E. Xilouris; M. P. Haynes
texts
eye 92
favorite 0
comment 0
Hickson Compact Groups (HCGs) are among the densest galaxy environments of the local universe. To examine the effects of the environment on the infrared properties of these systems, we present an analysis of Spitzer and ISO mid-infrared imaging as well as deep ground based near-infrared imaging of 14 HCGs containing a total of 69 galaxies. Based on mid-infrared color diagnostics we identify the galaxies which appear to host an active nucleus, while using a suite of templates, we fit the...
Source: http://arxiv.org/abs/1003.1644v2
55
55
Sep 18, 2013
09/13
by
E. Le Floc'h; I. F. Mirabel; O. Laurent; V. Charmandaris; P. Gallais; M. Sauvage; L. Vigroux; C. Cesarsky
texts
eye 55
favorite 0
comment 0
We report on Mid-Infrared (MIR) observations of the Seyfert 2 galaxy NGC 1068, obtained with ISOCAM in low-resolution spectro-imaging mode. The spatial resolution (around 5 arcsec) allows us to disentangle the circumnuclear starburst regions from the emission of the active galactic nucleus (AGN). The global spatial distribution of the Unidentified Infrared Bands (UIBs) is similar to the cold dust component, traced by the 450 microns emission and the gaseous component obtained from the CO(1-0)...
Source: http://arxiv.org/abs/astro-ph/0101038v1
45
45
Sep 19, 2013
09/13
by
D. Burgarella; E. Le Floc'h; T. T. Takeuchi; V. Buat; J. S. Huang; G. H. Rieke; K. D. Tyler
texts
eye 45
favorite 0
comment 0
We use deep GALEX images of CDFS in UV to define the first large sample of 420 Lyman Break Galaxies at z~1. We use a PSF fitting to estimate UV magnitudes on these deep crowded images. Deep Spitzer IRAC and MIPS provide the first detection of a large sample of Lyman Break Galaxies in the mid- to far-infrared range. We are therefore able to study and compare the UV and TIR emission of Lyman Break Galaxies. We find that about 15% of the LBG sample are strong emitters at 24 microns (Red LBGs)....
Source: http://arxiv.org/abs/astro-ph/0701322v1
6
6.0
Jun 30, 2018
06/18
by
M. Magliocchetti; D. Lutz; D. Rosario; S. Berta; E. Le Floc'h; B. Magnelli; F. Pozzi; L. Riguccini; P. Santini
texts
eye 6
favorite 0
comment 0
By exploiting the VLA-COSMOS and the Herschel-PEP surveys, we investigate the Far Infrared (FIR) properties of radio-selected AGN. To this purpose, from VLA-COSMOS we considered the 1537, F[1.4 GHz]>0.06 mJy sources with a reliable redshift estimate, and sub-divided them into star-forming galaxies and AGN solely on the basis of their radio luminosity. The AGN sample is complete with respect to radio selection at all z
Topics: Astrophysics of Galaxies, Astrophysics, Cosmology and Nongalactic Astrophysics
Source: http://arxiv.org/abs/1404.7014
49
49
Sep 22, 2013
09/13
by
E. Le Floc'h; V. Charmandaris; O. Laurent; I. F. Mirabel; P. Gallais; M. Sauvage; L. Vigroux; C. J. Cesarsky
texts
eye 49
favorite 0
comment 0
We present our 5-16 micron spectro-imaging observations of VV114, an infrared luminous early-stage merger, taken with the ISOCAM camera on-board ISO. We find that only 40% of the mid-infrared (MIR) flux is associated with a compact nuclear region, while the rest of the emission originates from a rather diffuse component extended over several kpc. This is in stark contrast with the very compact MIR starbursts usually seen in luminous infrared galaxies. A secondary peak of MIR emission is...
Source: http://arxiv.org/abs/astro-ph/0205401v1
82
82
Sep 21, 2013
09/13
by
D. Burgarella; E. Le Floc'h; T. T. Takeuchi; J. S. Huang; V. Buat; G. H. Rieke; K. D. Tyler
texts
eye 82
favorite 0
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Ultraviolet (UV) galaxies have been selected from GALEX. The presence of a FUV-dropout in their spectral energy distributions proved to be a very complete (83.3%) but not very efficient (21.4%) tool for identifying Lyman Break Galaxies (LBGs) at z~1. We divide the LBG sample into two sub-classes: red LBGs (RLBGs) detected at 24 micron which are mainly Luminous IR Galaxies (LIRGs) and blue LBGs (BLBGs) undetected at 24 microns down to 83 microJy. Two of the RLBGs are also detected at 70 micron....
Source: http://arxiv.org/abs/0706.0810v2
42
42
Sep 23, 2013
09/13
by
E. Le Floc'h; V. Charmandaris; K. Gordon; W. J. Forrest; B. Brandl; D. Schaerer; M. Dessauges-Zavadsky; L. Armus
texts
eye 42
favorite 0
comment 0
We present a characterization of the close environment of GRB980425 based on 5-160mic spectro-imaging obtained with Spitzer. The Gamma-Ray Burst GRB980425 occurred in a nearby (z=0.0085) SBc-type dwarf galaxy, at a projected distance of 900pc from an HII region with strong signatures of Wolf-Rayet (WR) stars. While this "WR region" produces less than 5% of the B-band emission of the host, we find that it is responsible for 45+/-10% of the total infrared luminosity, with a maximum...
Source: http://arxiv.org/abs/1111.1234v1
44
44
Sep 18, 2013
09/13
by
J. L. Higdon; S. J. U. Higdon; S. P. Willner; M. J. Brown; D. Stern; E. Le Floc'h; P. Eisenhardt
texts
eye 44
favorite 0
comment 0
We have combined data from the NOAO Deep Wide-Field Survey in Bootes and the Spitzer Space Telescope to determine basic properties for sixteen optically "invisible" MIPS 24um (OIMS) and thirty-five optically "invisible" radio (OIRS) soruces, including their spectral energy distributions (SED) and luminosities. Most OIMSs possess steep power-law SEDs over lambda(rest) = 1-10 um, indicating the presence of obscured AGN in agreement with Spitzer spectroscopy. These objects are...
Source: http://arxiv.org/abs/0806.2138v1
3
3.0
Jun 30, 2018
06/18
by
C. Maier; B. L. Ziegler; S. J. Lilly; T. Contini; E. Perez Montero; F. Lamareille; M. Bolzonella; E. Le Floc'h
texts
eye 3
favorite 0
comment 0
(Abridged) The knowledge of the number and of the physical nature of low-metallicity massive galaxies is crucial for the determination and interpretation of the mass-metallicity relation (MZR). Using VLT-ISAAC near-infrared (NIR) spectroscopy of 39 zCOSMOS z~0.7 galaxies, we have measured Halpha and [NII] emission line fluxes for galaxies with [OII], Hbeta and [OIII] available from VIMOS optical spectroscopy. The NIR spectroscopy enables us to break the degeneracy of the R23 method to derive...
Topics: Astrophysics of Galaxies, Astrophysics
Source: http://arxiv.org/abs/1410.7389
43
43
Sep 19, 2013
09/13
by
V. Buat; D. Marcillac; D. Burgarella; E. Le Floc'h; G. Rieke; T. T. Takeuchi; J. Iglesias-Paramo; C. K. Xu
texts
eye 43
favorite 0
comment 0
The TIR and FUV luminosity functions of galaxies and the related luminosity densities rho(TIR) and rho(FUV) are known to evolve from z=0 to z~1 but with a different rate: the galaxy populations appear brighter in the past at both wavelengths but the evolution in TIR is larger than in FUV. It leads to an increase of the ratio of TIR to FUV luminosity densities rho(TIR)/rho(FUV) which can be interpreted as a global increase of the dust attenuation from z=0 to z~1. Our aim is to understand the...
Source: http://arxiv.org/abs/astro-ph/0703014v1
12
12
Jun 30, 2018
06/18
by
T. Bitsakis; V. Charmandaris; P. N. Appleton; T. Diaz-Santos; E. Le Floc'h; E. da Cunha; K. Alatalo; M. Cluver
texts
eye 12
favorite 0
comment 0
We present a Herschel far-IR and sub-mm study of a sample of 120 galaxies in 28 Hickson Compact Groups. Fitting their UV to sub-mm spectral energy distributions with the model of da Cunha et al. (2008), we accurately estimate the dust masses, luminosities and temperatures of the individual galaxies. We find that nearly half of the late-type galaxies in dynamically "old" groups, those with more than 25% of early-type members and redder UV-optical colours, have also significantly lower...
Topics: Astrophysics of Galaxies, Astrophysics, Cosmology and Nongalactic Astrophysics
Source: http://arxiv.org/abs/1402.1470
42
42
Sep 18, 2013
09/13
by
V. Buat; S. Boissier; D. Burgarella; T. T. Takeuchi; E. Le Floc'h; D. Marcillac; J. Huang; M. Nagashima; M. Enoki
texts
eye 42
favorite 0
comment 0
We investigate whether the mean star formation activity of star-forming galaxies from z=0 to z=0.7 in the GOODS-S field can be reproduced by simple evolution models of these systems. In this case, such models might be used as first order references for studies at higher z to decipher when and to what extent a secular evolution is sufficient to explain the star formation history in galaxies. We selected star-forming galaxies at z=0 and at z=0.7 in IR and in UV to have access to all the recent...
Source: http://arxiv.org/abs/0803.0414v1
48
48
Sep 21, 2013
09/13
by
L. Riguccini; E. Le Floc'h; O. Ilbert; H. Aussel; M. Salvato; P. Capak; H. McCracken; J. Kartaltepe; D. Sanders; N. Scoville
texts
eye 48
favorite 0
comment 0
A substantial fraction of the stellar mass growth across cosmic time occurred within dust-enshrouded environments. Yet, the exact amount of star-forming activity that took place in high-redshift dusty galaxies currently missed by optical surveys has been barely explored. Using the Spitzer observations of COSMOS we determined the fraction of luminous star-forming galaxies at 1.5
Source: http://arxiv.org/abs/1106.0498v1
51
51
Sep 19, 2013
09/13
by
V. Charmandaris; O. Laurent; E. Le Floc'h; I. F. Mirabel; M. Sauvage; S. Madden; P. Gallais; L. Vigroux; C. J. Cesarsky
texts
eye 51
favorite 0
comment 0
We present a study of the three ultraluminous infrared galaxies IRAS14348-1447, IRAS19254-7245, and IRAS23128-5919, based on mid-infrared (MIR) spectro-imaging (5-18microns) observations performed with ISOCAM. We find that the MIR emission from each system, which consists of a pair of interacting late type galaxies, is principally confined to the nuclear regions with diameters of 1-2kpc and can account for more than 95% of their IRAS 12micron flux. In each interacting system, the galaxy hosting...
Source: http://arxiv.org/abs/astro-ph/0206150v1
65
65
Sep 18, 2013
09/13
by
C. Feruglio; F. Fiore; R. Maiolino; E. Piconcelli; H. Aussel; D. Elbaz; E. Le Floc'h; E. Sturm; R. Davies; C. Cicone
texts
eye 65
favorite 0
comment 0
We present deep CO observations of NGC6240 performed with the IRAM Plateau de Bure Interferometer (PdBI). NGC6240 is the prototypical example of a major galaxy merger in progress, caught at an early stage, with an extended, strongly-disturbed butterfly-like morphology and the presence of a heavily obscured active nucleus in the core of each progenitor galaxy. The CO line shows a skewed profile with very broad and asymmetric wings detected out to velocities of -600 km/s and +800 km/s with...
Source: http://arxiv.org/abs/1211.0841v1
77
77
Sep 19, 2013
09/13
by
K. I. Caputi; G. Lagache; Lin Yan; H. Dole; N. Bavouzet; E. Le Floc'h; P. I. Choi; G. Helou; N. Reddy
texts
eye 77
favorite 0
comment 0
We present the rest-frame 8 micron luminosity function (LF) at redshifts z=1 and ~2, computed from Spitzer 24 micron-selected galaxies in the GOODS fields over an area of 291 sq. arcmin. Using classification criteria based on X-ray data and IRAC colours, we identify the AGN in our sample. The rest-frame 8 micron LF for star-forming galaxies at redshifts z=1 and ~2 have the same shape as at z~0, but with a strong positive luminosity evolution. The number density of star-forming galaxies with...
Source: http://arxiv.org/abs/astro-ph/0701283v1
7
7.0
Jun 29, 2018
06/18
by
A. Psychogyios; V. Charmandaris; T. Diaz- Santos; L. Armus; S. Haan; J. Howell; E. Le Floc'h; S. M. Petty; A. S. Evans
texts
eye 7
favorite 0
comment 0
We present an analysis of the morphological classification of 89 luminous infrared galaxies (LIRGs) from the Great Observatories All-sky LIRG Survey (GOALS) sample using non-parametric coefficients and compare their morphology as a function of wavelength. We rely on images obtained in the optical (B- and I-band) as well as in the infrared (H-band and 5.8$\mu$m). Our classification is based on the calculation of $Gini$ and the second order of light ($M_{20}$) non-parametric coefficients which we...
Topics: Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1602.08500
37
37
Sep 19, 2013
09/13
by
R. S. Bussmann; Arjun Dey; C. Borys; V. Desai; B. T. Jannuzi; E. Le Floc'h; J. Melbourne; K. Sheth; B. T. Soifer
texts
eye 37
favorite 0
comment 0
We present SHARC-II 350um imaging of twelve 24um-bright (F_24um > 0.8 mJy) Dust-Obscured Galaxies (DOGs) and CARMA 1mm imaging of a subset of 2 DOGs, all selected from the Bootes field of the NOAO Deep Wide-Field Survey. Detections of 4 DOGs at 350um imply IR luminosities which are consistent within a factor of 2 of expectations based on a warm dust spectral energy distribution (SED) scaled to the observed 24um flux density. The 350um upper limits for the 8 non-detected DOGs are consistent...
Source: http://arxiv.org/abs/0909.2650v1
49
49
Sep 18, 2013
09/13
by
M. M. Kasliwal; V. Charmandaris; D. Weedman; J. R. Houck; E. Le Floc'h; S. J. U. Higdon; L. Armus; H. I. Teplitz
texts
eye 49
favorite 0
comment 0
Using the 16$\mu$m peakup imager on the Infrared Spectrograph (IRS) on Spitzer, we present a serendipitous survey of 0.0392 deg$^{2}$ within the area of the NOAO Deep Wide Field Survey in Bootes. Combining our results with the available Multiband Imaging Photometer for Spitzer (MIPS) 24$\mu$m survey of this area, we produce a catalog of 150 16$\mu$m sources brighter than 0.18 mJy (3$\sigma$) for which we derive measures or limits on the 16/24$\mu$m colors. Such colors are especially useful in...
Source: http://arxiv.org/abs/astro-ph/0509607v1
45
45
Sep 23, 2013
09/13
by
A. Zajczyk; Y. A. Gallant; P. Slane; S. P. Reynolds; R. Bandiera; C. Gouiffès; E. Le Floc'h; F. Comerón; L. Koch Miramond
texts
eye 45
favorite 0
comment 0
We present infrared observations of the supernova remnant G21.5-0.9 with the Very Large Telescope, the Canada-France-Hawaii Telescope and the Spitzer Space Telescope. Using the VLT/ISAAC camera equipped with a narrow-band [FeII] 1.64um filter the entire pulsar wind nebula in SNR G21.5-0.9 was imaged. This led to detection of iron line-emitting material in the shape of a broken ring-like structure following the nebula's edge. The detected emission is limb-brightened. We also detect the compact...
Source: http://arxiv.org/abs/1105.4373v2
54
54
Jul 20, 2013
07/13
by
K. I. Caputi; H. Dole; G. Lagache; R. J. McLure; J. S. Dunlop; J. -L. Puget; E. Le Floc'h; P. G. Perez-Gonzalez
texts
eye 54
favorite 0
comment 0
We investigate the role of the luminous infrared galaxy (LIRG) and ultra-luminous infrared galaxy (ULIRG) phases in the evolution of Ks-selected galaxies and, in particular, Extremely Red Galaxies (ERGs). With this aim, we compare the properties of a sample of 2905 Ks 1x10^{11} Msun assembled at redshift z=0.5. A minimum of 65% of the galaxies with M>2.5x10^{11} Msun at z~2-3 are ULIRGs at those redshifts. 60% of the ULIRGs in our sample have the characteristic colours of ERGs. Conversely,...
Source: http://arxiv.org/abs/astro-ph/0604232v1
43
43
Sep 23, 2013
09/13
by
E. Le Floc'h; C. Papovich; H. Dole; E. Egami; P. Perez-Gonzalez; G. Rieke; M. Rieke; E. Bell; the Spitzer/MIPS GTO team
texts
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Using deep observations of the Chandra Deep Field South obtained with MIPS at 24mic, we present our preliminary estimates on the evolution of the infrared (IR) luminosity density of the Universe from z=0 to z~1. We find that a pure density evolution of the IR luminosity function is clearly excluded by the data. The characteristic luminosity L_IR* evolves at least by (1+z)^3.5 with lookback time, but our monochromatic approach does not allow us to break the degeneracy between a pure evolution in...
Source: http://arxiv.org/abs/astro-ph/0411623v1
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56
Sep 21, 2013
09/13
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L. R. Hovhannisyan; A. M. Mickaelian; D. W. Weedman; E. Le Floc'h; J. R. Houck; B. T. Soifer; K. Brand; A. Dey; B. T. Jannuzi
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eye 56
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Optically bright Galactic stars (V < 13 mag) having fv(24 um) > 1 mJy are identified in Spitzer mid-infrared surveys within 8.2 square degrees for the Bootes field of the NOAO Deep Wide-Field Survey and within 5.5 square degrees for the First Look Survey (FLS). 128 stars are identified in Bootes and 140 in the FLS, and their photometry is given. (K-[24]) colors are determined using K magnitudes from the 2MASS survey for all stars in order to search for excess 24 um luminosity compared to...
Source: http://arxiv.org/abs/0905.1487v1
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5.0
Jun 30, 2018
06/18
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R. Canameras; N. P. H. Nesvadba; R. Kneissl; M. Limousin; R. Gavazzi; D. Scott; H. Dole; B. Frye; S. Koenig; E. Le Floc'h; I. Oteo
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eye 5
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We study the properties of the foreground galaxy of the Ruby, the brightest gravitationally lensed high-redshift galaxy on the sub-millimeter sky as probed by the Planck satellite, and part of our sample of Planck's Dusty GEMS. The Ruby consists of an Einstein ring of 1.4" diameter at z = 3.005 observed with ALMA at 0.1" resolution, centered on a faint, red, massive lensing galaxy seen with HST/WFC3, which itself has an exceptionally high redshift, z = 1.525 $\pm$ 0.001, as confirmed...
Topics: Astrophysics of Galaxies, Astrophysics
Source: http://arxiv.org/abs/1703.02984
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10.0
Jun 29, 2018
06/18
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N. Nesvadba; R. Kneissl; R. Canameras; F. Boone; E. Falgarone; B. Frye; M. Gerin; S. Koenig; G. Lagache; E. Le Floc'h; S. Malhotra; D. Scott
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eye 10
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We present spatially resolved ALMA [CII] observations of the bright (flux density S=400 mJy at 350 microns), gravitationally lensed, starburst galaxy PLCK G045.1+61.1 at z=3.427, the "Garnet". This source is part of our set of "Planck's Dusty GEMS", discovered with the Planck's all-sky survey. Two emission-line clouds with a relative velocity offset of ~600 km/s extend towards north-east and south-west, respectively, of a small, intensely star-forming clump with a...
Topics: Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1610.01169
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7.0
Jun 28, 2018
06/18
by
M. Perna; M. Brusa; M. Salvato; G. Cresci; G. Lanzuisi; S. Berta; I. Delvecchio; F. Fiore; D. Lutz; E. Le Floc'h; V. Mainieri; L. Riguccini
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eye 7
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We present new data for four candidate obscured Compton-Thick (CT) quasars at z $\sim$1-2.5 observed with SINFONI VLT spectrograph in AO mode. These sources were selected from a 24$\mu$m Spitzer MIPS survey of the COSMOS field, on the basis of red mid-infrared-to-optical and optical-to-near-infrared colours, with the intention of identifying active galactic nuclei (AGNs) in dust enshrouded environments, where most of the black hole mass is assembled in dust enshrouded environments. Near...
Topics: Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1508.07884
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9.0
Jun 27, 2018
06/18
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A. Zanella; E. Daddi; E. Le Floc'h; F. Bournaud; R. Gobat; F. Valentino; V. Strazzullo; A. Cibinel; M. Onodera; V. Perret; F. Renaud; C. Vignali
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eye 9
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When the cosmic star formation history peaks (z ~ 2), galaxies vigorously fed by cosmic reservoirs are gas dominated and contain massive star-forming clumps, thought to form by violent gravitational instabilities in highly turbulent gas-rich disks. However, a clump formation event has not been witnessed yet, and it is debated whether clumps survive energetic feedback from young stars, thus migrating inwards to form galaxy bulges. Here we report spatially resolved spectroscopy of a bright...
Topics: Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1505.01290
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13
Jun 26, 2018
06/18
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L. Ciesla; V. Charmandaris; A. Georgakakis; E. Bernhard; P. D. Mitchell; V. Buat; D. Elbaz; E. Le Floc'h; C. G. Lacey; G. E. Magdis; M. Xilouris
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[abridged] We use the latest release of CIGALE, a galaxy SED fitting model relying on energy balance, to study the influence of an AGN in estimating both the SFR and stellar mass in galaxies, as well as the contribution of the AGN to the power output of the host. Using the galaxy formation SAM GALFORM, we create mock galaxy SEDs using realistic star formation histories (SFH) and add an AGN of Type 1, Type 2, or intermediate type whose contribution to the bolometric luminosity can be variable....
Topics: Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1501.03672
132
132
Jul 20, 2013
07/13
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C. Feruglio; H. Aussel; E. Le Floc'h; O. Ilbert; M. Salvato; P. Capak; F. Fiore; J. Kartaltepe; D. Sanders; N. Scoville; A. M. Koekemoer; Y. Ideue
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We investigate the effects of the environment on star-formation in a sample of massive luminous and ultra-luminous infrared galaxies (LIRGs and ULIRGs) with S(24 micron)>80 uJy and i+
Source: http://arxiv.org/abs/1007.1933v1
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50
Sep 19, 2013
09/13
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C. Mancini; E. Daddi; A. Renzini; F. Salmi; H. J. McCracken; A. Cimatti; M. Onodera; M. Salvato; A. M. Koekemoer; H. Aussel; E. Le Floc'h; C. Willott
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eye 50
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We investigate the properties of 12 ultra-massive passively evolving early type galaxies (ETGs) at z_phot>1.4 in the COSMOS 2 deg^2 field. These 12 ETGs were selected as pBzKs, have accurate 1.4
Source: http://arxiv.org/abs/0909.3088v1
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52
Sep 23, 2013
09/13
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K. I. Caputi; H. Dole; G. Lagache; R. J. McLure; J. -L. Puget; G. H. Rieke; J. S. Dunlop; E. Le Floc'h; C. Papovich; P. G. Perez-Gonzalez
texts
eye 52
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We present deep Ks 83 microJy (the 80% completeness limit of the Spitzer/GTO 24 micron catalog). 36% of our galaxies have spectroscopic redshifts (mostly at z 1.5. We determine the existence of a bump in the redshift distribution at z~1.9, indicating the presence of a significant population of galaxies with PAH emission at these redshifts. Massive (M>10^11 Msun) star-forming galaxies at redshifts 2500 Msun/yr), and some of them are able to construct a mass of 10^10-10^11 Msun in a single...
Source: http://arxiv.org/abs/astro-ph/0510070v1
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47
Sep 19, 2013
09/13
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M. Jauzac; H. Dole; E. Le Floc'h; H. Aussel; K. Caputi; O. Ilbert; M. Salvato; N. Bavouzet; A. Beelen; M. Béthermin; J. -P. Kneib; G. Lagache; J. -L. Puget
texts
eye 47
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The Cosmic Far-Infrared Background (CIB) at wavelengths around 160 {\mu}m corresponds to the peak intensity of the whole Extragalactic Background Light, which is being measured with increasing accuracy. However, the build up of the CIB emission as a function of redshift, is still not well known. Our goal is to measure the CIB history at 70 {\mu}m and 160 {\mu}m at different redshifts, and provide constraints for infrared galaxy evolution models. We use complete deep Spitzer 24 {\mu}m catalogs...
Source: http://arxiv.org/abs/1009.0419v1
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57
Sep 22, 2013
09/13
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D. Lazzati; S. Covino; S. di Serego Alighieri; G. Ghisellini; J. Vernet; E. Le Floc'h; D. Fugazza; S. Di Tomaso; D. Malesani; N. Masetti; E. Pian; E. Oliva; L. Stella
texts
eye 57
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Polarization measurements for the optical counterpart to GRB 021004 are presented and discussed. Our observations were performed with the TNG and the VLT-UT3 (Melipal) during the first and fourth night after the gamma-ray burst discovery. We find robust evidence of temporal evolution of the polarization, which is therefore, at least partially, intrinsic to the optical transient. We do not find convincing evidence of wavelength dependence for the intrinsic polarization of the transient, in...
Source: http://arxiv.org/abs/astro-ph/0308540v1
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42
Sep 19, 2013
09/13
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R. J. Assef; C. S. Kochanek; M. Brodwin; R. Cool; W. Forman; A. H. Gonzalez; R. C. Hickox; C. Jones; E. Le Floc'h; J. Moustakas; S. S. Murray; D. Stern
texts
eye 42
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We present a set of low resolution empirical SED templates for AGNs and galaxies in the wavelength range from 0.03 to 30 microns based on the multi-wavelength photometric observations of the NOAO Deep-Wide Field Survey Bootes field and the spectroscopic observations of the AGN and Galaxy Evolution Survey. Our training sample is comprised of 14448 galaxies in the redshift range 0
Source: http://arxiv.org/abs/0909.3849v3
