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We determine the galaxy infrared (IR) luminosity function (LF) as a function of the environment in a supercluster at z=0.23, using optical, near-IR, and mid- to far-IR photometry, as well as redshifts from optical spectroscopy. We identify…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-28 A. Biviano , D. Fadda , F. Durret , L. O. V. Edwards , F. Marleau

We use the Spitzer Wide-area InfraRed Extragalactic Legacy Survey (SWIRE) to explore the specific star-formation activity of galaxies and their evolution near the peak of the cosmic far-infrared (FIR) background at 70 and 160um. We use a…

Compact groups of galaxies are devised as extreme environments where interactions may drive galaxy evolution. In this work, we analysed whether the luminosities of galaxies inhabiting compact groups differ from those of galaxies in loose…

Astrophysics of Galaxies · Physics 2022-05-25 Ariel Zandivarez , Eugenia Diaz-Gimenez , Antonela Taverna

We present a catalog of mid-infrared (MIR) spectra of 150 infrared (IR) luminous galaxies in the Spitzer extragalactic first look survey obtained with IRS on board Spitzer. The sample is selected to be brighter than ~0.9 mJy at 24 micron…

Cosmology and Nongalactic Astrophysics · Physics 2009-08-05 Kalliopi M. Dasyra , Lin Yan , George Helou , Anna Sajina , Dario Fadda , Michel Zamojski , Lee Armus , Bruce Draine , David Frayer

We analyse the Fundamental Plane (FP) relation of $39,993$ early-type galaxies (ETGs) in the optical (griz) and $5,080$ ETGs in the Near-Infrared (YJHK) wavebands, forming an optical$+$NIR sample of $4,589$ galaxies. We focus on the…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 F. La Barbera , P. A. A. Lopes , R. R. de Carvalho , I. G. de la Rosa , A. A. Berlind

The Spitzer Space Telescope is devoting a significant fraction of the observing time to multi-wavelength cosmological surveys of different depths in various low-background sky regions. Several tens of thousand mid-IR galaxies have been…

Astrophysics · Physics 2007-05-23 A. Franceschini , M. Vaccari , S. Berta , G. Rodighiero , C. Lonsdale

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…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 T. Bitsakis , V. Charmandaris , E. Le Floc'h , T. Diaz-Santos , S. K. Slater , E. Xilouris , M. P. Haynes

Hubble Space Telescope (HST) imaging of four rich, X-ray luminous, galaxy clusters (0.33<z<0.83) is used to produce quantitative morphological measurements for galaxies in their fields. Catalogs of these measurements are presented for 1642…

Aims: Following the study already presented in our previous paper, based on the Nordic Optical Telescope (NOT) sample, which consists of five clusters of galaxies within the redshift range 0.18 $\leq$ z $\leq$ 0.25, imaged in the central…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-13 B. Ascaso , J. A. L Aguerri , M. Moles , R. Sánchez-Janssen , D. Bettoni

We present the mid-infrared (MIR) properties of galaxies within a supercluster in the North Ecliptic Pole region at z?0.087 observed with the AKARI satellite. We use data from the AKARI NEP-Wide (5.4 deg2) IR survey and the CLusters of…

We revisit the color-magnitude relation (CMR) of the Virgo cluster early-type galaxies in order to explore its alleged non-linearity. To this aim, we reanalyze the relation already published from data obtained within the ACS Virgo Cluster…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-16 Analia V. Smith Castelli , Nelida M. Gonzalez , Favio R. Faifer , Juan Carlos Forte

We search for massive and compact galaxies (superdense galaxies, hereafter SDGs) at z=0.03-0.11 in the Padova-Millennium Galaxy and Group Catalogue, a spectroscopically complete sample representative of the local Universe general field…

Based on the DESI Legacy Imaging Surveys released data and available spectroscopic redshifts, we identify 1.58 million clusters of galaxies by searching for the overdensity of stellar mass distribution of galaxies within redshift slices…

Cosmology and Nongalactic Astrophysics · Physics 2024-04-03 Z. L. Wen , J. L. Han

We measure the radial profiles of the stellar velocity dispersions, $\sigma(R)$, for 90 early-type galaxies (ETGs) in the MASSIVE survey, a volume-limited integral-field spectroscopic (IFS) galaxy survey targeting all northern-sky ETGs with…

Astrophysics of Galaxies · Physics 2017-12-20 Melanie Veale , Chung-Pei Ma , Jenny E. Greene , Jens Thomas , John P. Blakeslee , Jonelle L. Walsh , Jennifer Ito

Galaxy mergers are instrumental in dictating the final mass, structure, stellar populations, and kinematics of galaxies. Cosmological galaxy simulations indicate that the most massive galaxies at z=0 are dominated by high fractions of…

Astrophysics of Galaxies · Physics 2021-08-25 Thomas A. Davison , Mark A. Norris , Ryan Leaman , Harald Kuntschner , Alina Boecker , Glenn van de Ven

We present a study of the color evolution of elliptical and S0 galaxies in six clusters of galaxies inside the redshift range 0.78 < z < 1.27. For each cluster, we used imaging from the Hubble Space Telescope to determine morphological…

Astrophysics · Physics 2009-11-10 B. P. Holden , S. A. Stanford , P. Eisenhardt , M. Dickinson

The size-mass galaxy distribution is a key diagnostic for galaxy evolution. Massive compact galaxies are potential surviving relics of a high-redshift phase of star formation. Some of these could be nearly unresolved in SDSS imaging and…

Astrophysics of Galaxies · Physics 2020-12-08 Ivan K. Baldry , Tricia Sullivan , Raffaele Rani , Sebastian Turner

We present an all-sky catalogue of 395 nearby galaxy groups revealed in the Local Supercluster and its surroundings. The groups and their associations are identified among 10914 galaxies at |b|>15deg with radial velocities VLG<3500 km/s.…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 Dmitry Makarov , Igor Karachentsev

For a sample of star forming galaxies in the redshift interval 0.15$<$z$<$0.3, we study how both the relative strength of the AGN infra-red emission, compared to that due to the star formation (SF), and the numerical fraction of AGNs,…

Investigating the assembly history of the most massive and passive galaxies will enhance our understanding of why galaxies exhibit such a remarkable diversity in structure and morphology. In this paper, we simultaneously investigate the…

Astrophysics of Galaxies · Physics 2025-01-22 D. Stoppacher , A. D. Montero-Dorta , M. C. Artale , A. Knebe , N. Padilla , A. J. Benson , C. Behrens