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We describe the properties of a sample of galaxy groups with very unusual distributions of galaxy luminosities. The most extreme example has an X-ray luminosity similar to that of the Virgo cluster but has a very low richness, with only one…

Astrophysics · Physics 2009-09-29 L. R. Jones , T. J. Ponman , A. Horton , A. Babul , H. Ebeling , D. J. Burke

Using the conditional luminosity function -- the luminosity distribution of galaxies in a dark matter halo as a function of the halo mass -- we present an empirical model to describe the redshift evolution of the rest B-band galaxy…

Astrophysics · Physics 2009-11-11 Asantha Cooray

We present the composite luminosity function (hereafter LF) of galaxies for 80 Abell clusters studied in our survey of the Northern Hemisphere, using DPOSS data in the framework of the CRoNaRio collaboration. Our determination of the LF has…

Astrophysics · Physics 2007-05-23 S. Piranomonte , M. Paolillo , G. Longo , S. Andreon , E. Puddu , R. Scaramella , R. Gal , S. G. Djorgovski

By using dark nebulae as opaque outer screens, the luminosity function of white dwarfs and M dwarfs has been studied. High-extinction areas towards the Orion A, Serpens and rho Oph cloud complexes were observed, covering a volume…

Astrophysics · Physics 2007-05-23 Leif Festin

We use recent low-mass star models, which reproduce accurately the observed sequences of various globular clusters, to convert the observed luminosity functions into bolometric luminosity functions and mass functions down to the bottom of…

Astrophysics · Physics 2016-08-30 Gilles Chabrier , Dominique Méra

Recent work suggests that rich clusters of galaxies commonly have large populations of dwarf (i.e. low luminosity) members, that is their luminosity function (LF) turns up to a steep slope at the faint end. This population, or more…

Astrophysics · Physics 2009-10-30 S. Phillipps , S. P. Driver , W. J. Couch , R. M. Smith

We present 4.5 {\mu}m luminosity functions for galaxies identified in 178 candidate galaxy clusters at 1.3 < z < 3.2. The clusters were identified as Spitzer/IRAC color-selected overdensities in the Clusters Around Radio-Loud AGN (CARLA)…

The galaxy Luminosity Function (LF) has been estimated in the rest frame B luminosity at 0<z<1.25 and at 1700 {\AA} for 2.5<z<4.5 from deep multicolor surveys in the HDF-N, HDF-S, NTT-DF. The results have been compared with a recent version…

Astrophysics · Physics 2009-11-06 F. Poli , N. Menci , E. Giallongo , A. Fontana , S. Cristiani , S. D' Odorico

We present an optical multicolor-imaging study of the galaxy cluster Abell 521 at $z = 0.25$, using Suprime-Cam on the Subaru Telescope, covering an area of $32 \times 20$ arcmin$^2$ ($9.4 \times 5.8 h_{50}^{-2}$ Mpc$^2$ at $z = 0.25$). Our…

Using V band photometry of the WINGS survey, we derive galaxy luminosity functions (LF) in nearby clusters. This sample is complete down to Mv=-15.15, and it is homogeneous, thus allowing the study of an unbiased sample of clusters with…

Astrophysics of Galaxies · Physics 2015-08-26 A. Moretti , D. Bettoni , B. M. Poggianti , G. Fasano , J. Varela , M. D'Onofrio , B. Vulcani , A. Cava , J. Fritz , W. J. Couch , M. Moles , P. Kjærgaard

We performed a search for faint low surface brightness dwarf galaxies around the major spiral galaxy M\,101 and in the large rectangular area within SGL = [30 -- 80]$^{\circ}$, SGB =[10 -- 37]$^{\circ}$ spanning a chain of galaxies: M\,63,…

Astrophysics of Galaxies · Physics 2023-10-04 Valentina E. Karachentseva , Igor D. Karachentsev , Elena I. Kaisina , Serafim S. Kaisin

We present the photometric and spectroscopic results of a survey done in a wide-field area of nearby groups and poor clusters. The main goals are identifying and characterizing the properties of low-surface-brightness dwarf galaxies and…

Astrophysics · Physics 2007-05-23 E. R. Carrasco , C. Mendes de Oliveira , L. Infante

(Abridged) The Sloan Digital Sky Survey now extends over a large enough region that galaxies in low density environments can be detected. Rojas et al. have developed a technique to extract more than 1000 void galaxies with delta rho/rho <…

Astrophysics · Physics 2009-11-10 Fiona Hoyle , Randall R. Rojas , Michael S. Vogeley , John Brinkmann

We derive the luminosity functions in three bands (BVR) for the rich galaxy cluster ABCG 209 at z=0.21. The data cover an area of ~78 arcmin^2 in the B and R bands, while a mosaic of three pointings was obtained in the V band, covering an…

Astrophysics · Physics 2009-11-07 A. Mercurio , M. Massarotti , P. Merluzzi , M. Girardi , F. La Barbera , G. Busarello

We measure the faint end slope of the galaxy luminosity function (LF) for cluster galaxies at 1<z<1.5 using Spitzer IRAC data. We investigate whether this slope, alpha, differs from that of the field LF at these redshifts, and with the…

We present the GALEX NUV (2310 A) and FUV (1530 A) galaxy luminosity functions of the nearby cluster of galaxies A1367 in the magnitude range -20.3< M_AB < -13.3. The luminosity functions are consistent with previous (~ 2 mag shallower)…

We have obtained new redshifts for 265 objects in the central 48~$\times$~25~arcmin$^2$ region of the Coma cluster. When supplemented with literature data, our redshift sample is 95~\% complete up to a magnitude b$_{26.5}$=18.0 (the…

Astrophysics · Physics 2007-05-23 A. Biviano , F. Durret , D. Gerbal , O. Le Fèvre , C. Lobo , A. Mazure , E. Slezak

We present a photometric study of the early-type dwarf galaxy population of the Centaurus cluster, aiming at investigating the galaxy luminosity function (LF) and galaxy scaling relations down to the regime of galaxies with M_V~-10 mag. On…

Cosmology and Nongalactic Astrophysics · Physics 2009-11-13 I. Misgeld , M. Hilker , S. Mieske

We present J and K-band luminosity functions (LF) for the Group Evolution Multiwavelength Study (GEMS) sample of 60 nearby groups of galaxies, with photometry from the 2MASS survey. We find that, as seen in B and R-band photometry of a…

Astrophysics · Physics 2009-11-11 Trevor A. Miles , Somak Raychaudhury , Paul A. Russell
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