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We present a study of galaxies in the Abell 901/902 Supercluster at z~0.165, based on HST ACS F606W, COMBO-17, Spitzer 24um, XMM-Newton X-ray, and gravitational lensing maps, as part of the STAGES survey. We characterize galaxies with…

We use detailed modeling of stellar populations of nearby galaxies to calculate population parameters. Our sample of galaxies includes most galaxies of the Local Group and several more distant giant galaxies. Available data are sufficient…

Astrophysics · Physics 2007-05-23 J. Einasto , P. Tenjes

We present an analysis of stellar populations in passive galaxies in seven massive X-ray clusters at z=0.19-0.89. Based on absorption line strengths measured from our high signal-to-noise spectra, the data support primarily passive…

Astrophysics of Galaxies · Physics 2017-12-06 Inger Jorgensen , Kristin Chiboucas , Emily Berkson , Omega Smith , Marianne Takamiya , Alexa Villaume

We study the stellar cluster population in two adjacent fields in the nearby, face-on spiral galaxy, M83, using WFC3/HST imaging. The clusters are selected through visual inspection to be centrally concentrated, symmetric, and resolved on…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-30 N. Bastian , A. Adamo , M. Gieles , E. Silva Villa , H. J. G. L. M Lamers , S. S. Larsen , L. J. Smith , I. S. Konstantopoulos , E. Zackrisson

A study of aperture size effects on star cluster photometry in crowded fields is presented. Tests were performed on a sample of 285 star cluster candidates in the South-West field of the M31 galaxy disk, measured in the Local Group Galaxy…

Astrophysics · Physics 2008-11-26 D. Narbutis , V. Vansevicius , K. Kodaira , A. Bridzius , R. Stonkute

We present in this paper a new three-dimensional galaxy classification system designed to account for the diversity of galaxy properties in the nearby universe. To construct this system we statistically analyse a sample of >22,000 galaxies…

Astrophysics · Physics 2009-11-11 Christopher J. Conselice

Two-dimensional high-resolution density field of galaxies of the Early Data Release of the Sloan Digital Sky Survey with a smoothing lengths 0.8 h^{-1} Mpc is applied to extract clusters of galaxies, and a low-resolution field with…

Astrophysics · Physics 2011-03-03 J. Einasto , G. H"utsi , M. Einasto , E. Saar , D. L. Tucker , V. M"uller , P. Hein"am"aki , S. S. Allam

We investigate the effect of the cluster environment on the star formation properties of galaxies in 8 nearby Abell clusters. Star formation properties are determined for individual galaxies using the equivalent width of H alpha plus [NII]…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 C. F. Bretherton , P. A. James , C. Moss , M. Whittle

The outskirts of galaxy clusters host complex interactions between the intra-cluster and circumcluster media. During cluster evolution, ram-pressure stripped gas clumps from infalling substructures break the uniformity of the gas…

Astrophysics of Galaxies · Physics 2023-06-21 Orsolya E. Kovács , Zhenlin Zhu , Norbert Werner , Aurora Simionescu , Ákos Bogdán

We combine JWST/NIRCam imaging and MUSE data to characterize the properties of galaxies in different environmental conditions in the cluster Abell2744 ($z=0.3064$) and in its immediate surroundings. We investigate how galaxy colors,…

We present a study of bar and host disk evolution in a dense cluster environment, based on a sample of ~800 bright (MV <= -18) galaxies in the Abell 901/2 supercluster at z~0.165. We use HST ACS F606W imaging from the STAGES survey, and…

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…

We present a comprehensive space-based study of ten X-ray luminous galaxy clusters (L_X>=8e44erg/s[0.1-2.4keV]) at z=0.2. Hubble Space Telescope observations reveal numerous gravitationally-lensed arcs for which we present four new…

Globular clusters (GCs) lie scattered around the inner $40\%$ of the virial radius of galaxy clusters, potentially being excellent tracers of the underlying mass distribution. In this paper, we present a statistical method based on assuming…

Astrophysics of Galaxies · Physics 2026-05-21 Marta Reina-Campos , Joshua S. Speagle , William E. Harris

In this letter we present calibrated mass and light profiles of the rich cluster of galaxies Abell 1689 out to 1 $h^{-1}$ Mpc from the center. The high surface density of faint blue galaxies at high redshift, selected by their low surface…

Astrophysics · Physics 2016-08-30 J. A. Tyson , P. Fischer

We present a Bayesian population modeling method to analyze the abundance of galaxy clusters identified by the South Pole Telescope (SPT) with a simultaneous mass calibration using weak gravitational lensing data from the Dark Energy Survey…

Cosmology and Nongalactic Astrophysics · Physics 2024-06-24 S. Bocquet , S. Grandis , L. E. Bleem , M. Klein , J. J. Mohr , M. Aguena , A. Alarcon , S. Allam , S. W. Allen , O. Alves , A. Amon , B. Ansarinejad , D. Bacon , M. Bayliss , K. Bechtol , M. R. Becker , B. A. Benson , G. M. Bernstein , M. Brodwin , D. Brooks , A. Campos , R. E. A. Canning , J. E. Carlstrom , A. Carnero Rosell , M. Carrasco Kind , J. Carretero , R. Cawthon , C. Chang , R. Chen , A. Choi , J. Cordero , M. Costanzi , L. N. da Costa , M. E. S. Pereira , C. Davis , T. de Haan , J. DeRose , S. Desai , H. T. Diehl , S. Dodelson , P. Doel , C. Doux , A. Drlica-Wagner , K. Eckert , J. Elvin-Poole , S. Everett , I. Ferrero , A. Ferté , A. M. Flores , J. Frieman , J. García-Bellido , M. Gatti , G. Giannini , M. D. Gladders , D. Gruen , R. A. Gruendl , I. Harrison , W. G. Hartley , K. Herner , S. R. Hinton , D. L. Hollowood , W. L. Holzapfel , K. Honscheid , N. Huang , E. M. Huff , D. J. James , M. Jarvis , F. Kéruzoré , G. Khullar , K. Kim , R. Kraft , K. Kuehn , N. Kuropatkin , S. Lee , P. -F. Leget , N. MacCrann , G. Mahler , A. Mantz , J. L. Marshall , J. McCullough , M. McDonald , J. Mena-Fernández , R. Miquel , J. Myles , A. Navarro-Alsina , R. L. C. Ogando , A. Palmese , S. Pandey , A. Pieres , A. A. Plazas Malagón , J. Prat , M. Raveri , C. L. Reichardt , J. Roberson , R. P. Rollins , A. K. Romer , C. Romero , A. Roodman , A. J. Ross , E. S. Rykoff , L. Salvati , C. Sánchez , E. Sanchez , D. Sanchez Cid , A. Saro , T. Schrabback , M. Schubnell , L. F. Secco , I. Sevilla-Noarbe , K. Sharon , E. Sheldon , T. Shin , M. Smith , T. Somboonpanyakul , B. Stalder , A. A. Stark , V. Strazzullo , E. Suchyta , M. E. C. Swanson , G. Tarle , C. To , M. A. Troxel , I. Tutusaus , T. N. Varga , A. von der Linden , N. Weaverdyck , J. Weller , P. Wiseman , B. Yanny , B. Yin , M. Young , Y. Zhang , J. Zuntz

We discuss the properties of galaxies around the radio galaxy 3C 324 at z=1.2 based on BVRIK' multi-band imaging data. We have applied a photometric-redshift technique to objects in the 3C 324 field, and identified 35 objects as plausible…

We present results from a deep photometric study of the rich galaxy cluster Abell 2218 (z=0.18) based on archival HST WFPC2 F606W images. These have been used to derive the luminosity function to extremely faint limits (M_{F606W}=-13.2 mag,…

We present a statistical analysis of a sample of 20 strong lensing clusters drawn from the Local Cluster Substructure Survey (LoCuSS), based on high resolution Hubble Space Telescope imaging of the cluster cores and follow-up spectroscopic…