51
51
Sep 22, 2013
09/13
by
Kristen Coppin; Alexandra Pope; Karin Menendez-Delmestre; David M. Alexander; James Dunlop
texts
eye 51
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It is widely believed that ultraluminous infrared (IR) galaxies and active galactic nuclei (AGN) activity are triggered by galaxy interactions and merging, with the peak of activity occurring at z~2, where submillimetre galaxies are thousands of times more numerous than local ULIRGs. In this evolutionary picture, submillimetre galaxies (SMGs) would host an AGN, which would eventually grow a black hole (BH) strong enough to blow off all of the gas and dust leaving an optically luminous QSO. To...
Source: http://arxiv.org/abs/1001.3518v1
48
48
Sep 18, 2013
09/13
by
Thiago S. Gonçalves; D. Christopher Martin; Karín Menéndez-Delmestre; Ted Wyder; Anton Koekemoer
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eye 48
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The bimodality in galaxy properties has been observed at low and high redshift, with a clear distinction between star-forming galaxies in the blue cloud and passively evolving objects in the red sequence; the absence of galaxies with intermediate properties indicates that the quenching of star formation and subsequent transition between populations must happen rapidly. In this paper, we present a study of over 100 transiting galaxies in the so-called "green valley" at intermediate...
Source: http://arxiv.org/abs/1209.4084v1
64
64
Sep 18, 2013
09/13
by
Karin Menendez-Delmestre; Kartik Sheth; Eva Schinnerer; Thomas H. Jarrett; Nick Z. Scoville
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eye 64
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We have measured the fraction of bars in nearby spiral galaxies using near-infrared J, H, and K_s images of 151 spiral galaxies from 2MASS. This local sample provides an anchor for the study of the evolution of the bar fraction and bar properties with redshift. We identify bars by analyzing the full two-dimensional light distribution and requiring a combined ellipticity and position angle signature. The combined bar signature is found in 59% of the galaxies. The bar fraction increases to 67%...
Source: http://arxiv.org/abs/astro-ph/0611540v1
59
59
Sep 20, 2013
09/13
by
Rob Ivison; Ian Smail; Misty Bentz; Jason Stevens; Karin Menendez-Delmestre; Scott Chapman; Andrew Blain
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eye 59
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We have investigated the rest-frame optical and far-infrared properties of a sample of extremely bright candidate Lyman-break galaxies (LBG) identified in the Sloan Digital Sky Survey. Their high ultraviolet luminosities and lack of strong ultraviolet emission lines are suggestive of massive starbursts, although it is possible that they are more typical luminosity LBGs which have been highly magnified by strong gravitational lensing. Alternatively, they may be an unusual class of weak-lined...
Source: http://arxiv.org/abs/astro-ph/0506490v2
39
39
Sep 22, 2013
09/13
by
Karín Menéndez-Delmestre; Andrew W. Blain; Mark Swinbank; Ian Smail; Rob J. Ivison; Scott C. Chapman; Thiago S. Gonçalves
texts
eye 39
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We present the first integral-field spectroscopic observations of high-redshift submillimeter-selected galaxies (SMGs) using Laser Guide Star Adaptive Optics (LGS-AO). We target H-alpha emission of three SMGs at redshifts z~1.4-2.4 with the OH-Suppressing Infrared Imaging Spectrograph (OSIRIS) on Keck. The spatially-resolved spectroscopy of these galaxies reveals unresolved broad H-alpha line regions (FWHM>1000 km/s) likely associated with an AGN and regions of diffuse star formation traced...
Source: http://arxiv.org/abs/1302.2145v1
62
62
Sep 23, 2013
09/13
by
Karín Menéndez-Delmestre; Andrew W. Blain; Ian Smail; Dave M. Alexander; Scott C. Chapman; Lee Armus; Dave Frayer; Rob J. Ivison; Harry Teplitz
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eye 62
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We used the Spitzer Infrared Spectrograph (IRS) to study the mid-IR properties and investigate the energetics of 24 Submillimeter Galaxies (SMGs). This is the largest sample of SMGs observed with Spitzer IRS and covers the full extent of properties of the radio-identified population of SMGs in the redshift range of z ~ 0.65-3.2. We observe broad emission features from Polycyclic Aromatic Hydrocarbons (PAHs) in more than 80% of our sample. We find that the median mid-IR spectrum is well...
Source: http://arxiv.org/abs/0903.4017v1
66
66
Sep 19, 2013
09/13
by
Karín Menéndez-Delmestre; Andrew W. Blain; Dave M. Alexander; Ian Smail; Lee Armus; Scott C. Chapman; Dave Frayer; Rob J. Ivison; Harry Teplitz
texts
eye 66
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We present mid-infrared spectra of 5 submillimeter galaxies at z=0.65-2.38 taken with the Spitzer Space Telescope. Four of these sources, at z
Source: http://arxiv.org/abs/astro-ph/0610915v2
58
58
Sep 20, 2013
09/13
by
C. M. Harrison; D. M. Alexander; A. M. Swinbank; Ian Smail; S. Alaghband-Zadeh; F. E. Bauer; S. C. Chapman; A. Del Moro; R. C. Hickox; R. J. Ivison; Karin Menendez-Delmestre; J. R. Mullaney; N. P. H. Nesvadba
texts
eye 58
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We present integral field spectroscopy observations, covering the [O III]4959,5007 emission-line doublet of eight high-redshift (z=1.4-3.4) ultra-luminous infrared galaxies (ULIRGs) that host Active Galactic Nuclei (AGN) activity, including known sub-millimetre luminous galaxies (SMGs). The targets have moderate radio luminosities that are typical of high-redshift ULIRGs (L(1.4GHz)=10^(24)-10^(25)W/Hz) and therefore are not radio-loud AGN. We de-couple kinematic components due to the galaxy...
Source: http://arxiv.org/abs/1205.1801v3
48
48
Sep 23, 2013
09/13
by
Sébastien Comerón; Johan H. Knapen; Kartik Sheth; Michael W. Regan; Joannah L. Hinz; Armando Gil de Paz; Karín Menéndez-Delmestre; Juan-Carlos Muñoz-Mateos; Mark Seibert; Taehyun Kim; E. Athanassoula; Albert Bosma; Ronald J. Buta; Bruce G. Elmegreen; Luis C. Ho; Benne W. Holwerda; Eija Laurikainen; Heikki Salo; Eva Schinnerer
texts
eye 48
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If thick disks are ubiquitous and a natural product of disk galaxy formation and/or evolution processes, all undisturbed galaxies which have evolved during a significant fraction of a Hubble time should have a thick disk. The late-type spiral galaxy NGC 4244 has been reported as the only nearby edge-on galaxy without a confirmed thick disk. Using data from the Spitzer Survey of Stellar Structure in Galaxies (S4G) we have identified signs of two disk components in this galaxy. The asymmetries...
Source: http://arxiv.org/abs/1012.0749v1
56
56
Sep 18, 2013
09/13
by
Sébastien Comerón; Bruce G. Elmegreen; Heikki Salo; Eija Laurikainen; E. Athanassoula; Albert Bosma; Johan H. Knapen; Dimitri A. Gadotti; Kartik Sheth; Joannah L. Hinz; Michael W. Regan; Armando Gil de Paz; Juan-Carlos Muñoz-Mateos; Karín Menéndez-Delmestre; Mark Seibert; Taehyun Kim; Trisha Mizusawa; Jarkko Laine; Luis C. Ho; Benne Holwerda
texts
eye 56
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Breaks in the radial luminosity profiles of galaxies have been until now mostly studied averaged over discs. Here we study separately breaks in thin and thick discs in 70 edge-on galaxies using imaging from the Spitzer Survey of Stellar Structure in Galaxies. We built luminosity profiles of the thin and the thick discs parallel to midplanes and we found that thin discs often truncate (77%). Thick discs truncate less often (31%), but when they do, their break radius is comparable with that in...
Source: http://arxiv.org/abs/1209.1513v2
85
85
Jul 20, 2013
07/13
by
Sharon E. Meidt; Eva Schinnerer; Juan-Carlos Munoz-Mateos; Benne Holwerda; Luis C. Ho; Barry F. Madore; Johan H. Knapen; Albert Bosma; E. Athanassoula; Joannah L. Hinz; Kartik Sheth; Michael Regan; Armando Gil de Paz; Karin Menendez-Delmestre; Mark Seibert; Taehyun Kim; Trisha Mizusawa; Dimitri A. Gadotti; Eija Laurikainen; Heikki Salo; Jarkko Laine; Sebastien Comeron
texts
eye 85
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We examine the effect of circumstellar dust extinction on the near-IR contribution of asymptotic giant branch (AGB) stars in intermediate-age clusters throughout the disk of M100. For our sample of 17 AGB-dominated clusters we extract optical-to-mid-IR SEDs and find that NIR brightness is coupled to the mid-IR dust emission in such a way that a significant reduction of AGB light, of up to 1 mag in K-band, follows from extinction by the dust shell formed during this stage. Since the dust optical...
Source: http://arxiv.org/abs/1203.0467v1
125
125
Jul 20, 2013
07/13
by
Sébastien Comerón; Bruce G. Elmegreen; Johan H. Knapen; Kartik Sheth; Joannah L. Hinz; Michael W. Regan; Armando Gil de Paz; Juan-Carlos Muñoz-Mateos; Karín Menéndez-Delmestre; Mark Seibert; Taehyun Kim; Trisha Mizusawa; Eija Laurikainen; Heikki Salo; Jarkko Laine; E. Athanassoula; Albert Bosma; Ronald J. Buta; Dimitri A. Gadotti; Luis C. Ho; Benne Holwerda; Eva Schinnerer; Dennis Zaritsky
texts
eye 125
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NGC 4013 is a nearby Sb edge-on galaxy known for its "prodigious" HI warp and its "giant" tidal stream. Previous work on this unusual object shows that it cannot be fitted satisfactorily by a canonical thin+thick disk structure. We have produced a new decomposition of NGC 4013, considering three stellar flattened components (thin+thick disk plus an extra and more extended component) and one gaseous disk. All four components are considered to be gravitationally coupled and...
Source: http://arxiv.org/abs/1107.0529v3
26
26
Jun 27, 2018
06/18
by
Heikki Salo; Eija Laurikainen; Jarkko Laine; Sebastien Comerón; Dimitri A. Gadotti; Ron Buta; Kartik Sheth; Dennis Zaritsky; Luis Ho; Johan Knapen; E. Athannassoula; Albert Bosma; Seppo Laine; Mauricio Cisternas; Taehyun Kim; Juan Carlos Muñoz-Mateos Michael Regan; Joannah L. Hinz; Armando Gil de Paz; Karin Menendez-Delmestre; Trisha Mizusawa; Santiago Erroz-Ferrer; Sharon E. Meidt; Miguel Querejeta
texts
eye 26
favorite 0
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The Spitzer Survey of Stellar Structure in Galaxies (S$^4$G, Sheth et. al. 2010) is a deep 3.6 and 4.5 $\mu$m imaging survey of 2352 nearby ($ < 40$ Mpc) galaxies. We describe the S$^4$G data analysis pipeline 4, which is dedicated to 2-dimensional structural surface brightness decompositions of 3.6 $\mu$m images, using GALFIT3.0 \citep{peng2010}. Besides automatic 1-component S\'ersic fits, and 2-component S\'ersic bulge + exponential disk fits, we present human supervised multi-component...
Topics: Astrophysics of Galaxies, Astrophysics
Source: http://arxiv.org/abs/1503.06550
41
41
Sep 21, 2013
09/13
by
Sébastien Comerón; Bruce G. Elmegreen; Johan H. Knapen; Heikki Salo; Eija Laurikainen; Jarkko Laine; E. Athanassoula; Albert Bosma; Kartik Sheth; Michael W. Regan; Joannah L. Hinz; Armando Gil de Paz; Karín Menéndez-Delmestre; Trisha Mizusawa; Juan-Carlos Muñoz-Mateos; Mark Seibert; Taehyun Kim; Debra M. Elmegreen; Dimitri A. Gadotti; Luis C. Ho; Benne W. Holwerda; Jani Lappalainen; Eva Schinnerer; Ramin Skibba
texts
eye 41
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Most, if not all, disk galaxies have a thin (classical) disk and a thick disk. In most models thick disks are thought to be a necessary consequence of the disk formation and/or evolution of the galaxy. We present the results of a study of the thick disk properties in a sample of carefully selected edge-on galaxies with types ranging from T=3 to T=8. We fitted one-dimensional luminosity profiles with physically motivated functions - the solutions of two stellar and one gaseous isothermal coupled...
Source: http://arxiv.org/abs/1108.0037v3
67
67
Sep 21, 2013
09/13
by
Taehyun Kim; Kartik Sheth; Joannah L. Hinz; Myung Gyoon Lee; Dennis Zaritsky; Dimitri A. Gadotti; Johan H. Knapen; Eva Schinnerer; Luis C. Ho; Eija Laurikainen; Heikki Salo; E. Athanassoula; Albert Bosma; Bonita de Swardt; Juan-Carlos Muñoz-Mateos; Barry F. Madore; Sébastien Comerón; Michael W. Regan; Karín Menéndez-Delmestre; Armando Gil de Paz; Mark Seibert; Jarkko Laine; Santiago Erroz Ferrer; Trisha Mizusawa
texts
eye 67
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Tidal debris around galaxies can yield important clues on their evolution. We have identified tidal debris in 11 early type galaxies (T \leq 0) from a sample of 65 early types drawn from the Spitzer Survey of Stellar Structure in Galaxies (S4G). The tidal debris includes features such as shells, ripples and tidal tails. A variety of techniques, including two-dimensional decomposition of galactic structures, was used to quantify the residual tidal features. The tidal debris contributes ~3 - 10%...
Source: http://arxiv.org/abs/1204.3879v1
18
18
Jun 27, 2018
06/18
by
Juan Carlos Munoz-Mateos; Kartik Sheth; Michael Regan; Taehyun Kim; Jarkko Laine; Santiago Erroz-Ferrer; Armando Gil de Paz; Sebastien Comeron; Joannah Hinz; Eija Laurikainen; Heikki Salo; E. Athanassoula; Albert Bosma; Alexandre Y. K. Bouquin; Eva Schinnerer; Luis Ho; Dennis Zaritsky; Dimitri Gadotti; Barry Madore; Benne Holwerda; Karin Menendez-Delmestre; Johan H. Knapen; Sharon Meidt; Miguel Querejeta; Trisha Mizusawa; Mark Seibert; Seppo Laine; Helene Courtois
texts
eye 18
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The Spitzer Survey of Stellar Structure in Galaxies (S4G) is a volume, magnitude, and size-limited survey of 2352 nearby galaxies with deep imaging at 3.6 and 4.5um. In this paper we describe our surface photometry pipeline and showcase the associated data products that we have released to the community. We also identify the physical mechanisms leading to different levels of central stellar mass concentration for galaxies with the same total stellar mass. Finally, we derive the local stellar...
Topics: Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1505.03534
71
71
Sep 23, 2013
09/13
by
Sharon E. Meidt; Eva Schinnerer; Johan H. Knapen; Albert Bosma; E. Athanassoula; Kartik Sheth; Ronald J. Buta; Dennis Zaritsky; Eija Laurikainen; Debra Elmegreen; Bruce G. Elmegreen; Dimitri A. Gadotti; Heikki Salo; Michael Regan; Luis C. Ho; Barry F. Madore; Joannah L. Hinz; Ramin A. Skibba; Armando Gil de Paz; Juan-Carlos Munoz-Mateos; Karin Menendez-Delmestre; Mark Seibert; Taehyun Kim; Trisha Mizusawa; Jarkko Laine; Sebastien Comeron
texts
eye 71
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With the aim of constructing accurate 2D maps of the stellar mass distribution in nearby galaxies from S4G 3.6 and 4.5 micron images, we report on the separation of the light from old stars from the emission contributed by contaminants (e.g. hot dust and the 3.3 micron PAH feature). Results for a small sample of six disk galaxies (NGC 1566, NGC 2976, NGC 3031, NGC 3184, NGC 4321, and NGC 5194) with a range of morphological properties, dust contents and star formation histories are presented to...
Source: http://arxiv.org/abs/1110.2683v1
5
5.0
Jun 30, 2018
06/18
by
Taehyun Kim; Kartik Sheth; Dimitri A. Gadotti; Myung Gyoon Lee; Dennis Zaritsky; Bruce G. Elmegreen; E. Athanassoula; Albert Bosma; Benne Holwerda; Luis C. Ho; Sébastien Comerón; Johan H. Knapen; Joannah L. Hinz; Juan-Carlos Muñoz-Mateos; Santiago Erroz-Ferrer; Ronald J. Buta; Minjin Kim; Eija Laurikainen; Heikki Salo; Barry F. Madore; Jarkko Laine; Karín Menéndez-Delmestre; Michael W. Regan; Bonita de Swardt; Armando Gil de Paz; Mark Seibert; Trisha Mizusawa
texts
eye 5
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We have measured the radial light profiles and global shapes of bars using two-dimensional 3.6 $\mu m $ image decompositions for 144 face-on barred galaxies from the Spitzer Survey of Stellar Structure in Galaxies (S4G). The bar surface brightness profile is correlated with the stellar mass and bulge-to-total (B/T) ratio of their host galaxies. Bars in massive and bulge-dominated galaxies (B/T$>$0.2) show a flat profile, while bars in less massive, disk-dominated galaxies (B/T$\sim$0) show...
Topics: Astrophysics of Galaxies, Astrophysics
Source: http://arxiv.org/abs/1411.4650
5
5.0
Jun 30, 2018
06/18
by
Seppo Laine; Johan H. Knapen; Juan-Carlos Munoz-Mateos; Taehyun Kim; Sebastien Comeron; Marie Martig; Benne W. Holwerda; E. Athanassoula; Albert Bosma; Peter H. Johansson; Santiago Erroz-Ferrer; Dimitri A. Gadotti; Armando Gil de Paz; Joannah Hinz; Jarkko Laine; Eija Laurikainen; Karin Menendez-Delmestre; Trisha Mizusawa; Michael W. Regan; Heikki Salo; Kartik Sheth; Mark Seibert; Ronald J. Buta; Mauricio Cisternas; Bruce G. Elmegreen; Debra M. Elmegreen; Luis C. Ho; Barry F. Madore; Dennis...
texts
eye 5
favorite 0
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We present a catalogue and images of visually detected features, such as asymmetries, extensions, warps, shells, tidal tails, polar rings, and obvious signs of mergers or interactions, in the faint outer regions (at and outside of R_25) of nearby galaxies. This catalogue can be used in future quantitative studies that examine galaxy evolution due to internal and external factors. We are able to reliably detect outer region features down to a brightness level of 0.03 MJy/sr per pixel at 3.6...
Topics: Astrophysics of Galaxies, Astrophysics
Source: http://arxiv.org/abs/1408.2602
12
12
Jun 28, 2018
06/18
by
Bonita de Swardt; Kartik Sheth; Taehyun Kim; Stephen Pardy; Elena D'Onghia; Eric Wilcots; Joannah Hinz; Juan-Carlos Munoz-Mateos; Michael W. Regan; E. Athanassoula; Albert Bosma; Ronald J. Buta; Mauricio Cisternas; S ebastien Comeron; Dimitri A. Gadotti; Armando Gil de Paz; Thomas H. Jarrett; Bruce G. Elmegreen; Santiago Erroz-Ferrer; Luis C. Ho; Johan H. Knapen; Jarkko Laine; Eija Laurikainen; Barry F. Madore; Sharon Meidt; Karin Menendez-Delmestre; Chien Y. Peng; Heikki Salo; Eva Schinnerer;...
texts
eye 12
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We use mid-infrared 3.6 and 4.5microns imaging of NGC 3906 from the Spitzer Survey of Stellar Structure in Galaxies (S4G) to understand the nature of an unusual offset between its stellar bar and the photometric center of an otherwise regular, circular outer stellar disk. We measure an offset of ~720 pc between the center of the stellar bar and photometric center of the stellar disk; the bar center coincides with the kinematic center of the disk determined from previous HI observations....
Topics: Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1506.05153
85
85
Sep 19, 2013
09/13
by
Kartik Sheth; Michael Regan; Joannah L. Hinz; Armando Gil de Paz; Karín Menéndez-Delmestre; Juan-Carlos Muñoz-Mateos; Mark Seibert; Taehyun Kim; Eija Laurikainen; Heikki Salo; Dimitri A. Gadotti; Jarkko Laine; Trisha Mizusawa; Lee Armus; E. Athanassoula; Albert Bosma; Ronald J. Buta; Peter Capak; Thomas H. Jarrett; Debra M. Elmegreen; Bruce G. Elmegreen; Johan H. Knapen; Jin Koda; George Helou; Luis C. Ho; Barry F. Madore; Karen L. Masters; Bahram Mobasher; Patrick Ogle; Chien Y. Peng; Eva...
texts
eye 85
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The Spitzer Survey of Stellar Structure in Galaxies S^4G is an Exploration Science Legacy Program approved for the Spitzer post-cryogenic mission. It is a volume-, magnitude-, and size-limited (d < 40 Mpc, |b| > 30 degrees, m_(Bcorr) < 15.5, D25>1') survey of 2,331 galaxies using IRAC at 3.6 and 4.5 microns. Each galaxy is observed for 240 s and mapped to > 1.5 x D25. The final mosaicked images have a typical 1 sigma rms noise level of 0.0072 and 0.0093 MJy / sr at 3.6 and 4.5...
Source: http://arxiv.org/abs/1010.1592v2