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We investigate the role of dense environments in suppressing star formation by studying $\rm \log_{10}(M_\star/M_\odot) > 9.7$ star-forming galaxies in nine clusters from the Local Cluster Survey ($0.0137 < z < 0.0433$) and a large…

Massive galaxy clusters undergo strong evolution from z~1.6 to z~0.5, with overdense environments at high-z characterized by abundant dust-obscured star formation and stellar mass growth which rapidly give way to widespread quenching. Data…

We have formed ``composite spectra'' by combining the integrated-light spectra of individual galaxies in 8 intermediate-redshift and 12 low-redshift clusters of galaxies. Because these composite spectra have much higher signal-to-noise…

Mass and concentration of clusters of galaxies are related and evolving with redshift. We study the properties of a sample of 31 massive galaxy clusters at high redshift, 0.8 < z < 1.5, using weak and strong lensing observations.…

宇宙学与河外天体物理 · 物理学 2015-06-16 Mauro Sereno , Giovanni Covone

Clusters of galaxies gravitationally lens the cosmic microwave background (CMB) radiation, resulting in a distinct imprint in the CMB on arcminute scales. Measurement of this effect offers a promising way to constrain the masses of galaxy…

宇宙学与河外天体物理 · 物理学 2018-02-28 E. J. Baxter , S. Raghunathan , T. M. Crawford , P. Fosalba , Z. Hou , G. P. Holder , Y. Omori , S. Patil , E. Rozo , T. M. C. Abbott , J. Annis , K. Aylor , A. Benoit-Lévy , B. A. Benson , E. Bertin , L. Bleem , E. Buckley-Geer , D. L. Burke , J. Carlstrom , A. Carnero Rosell , M. Carrasco Kind , J. Carretero , C. L. Chang , H-M. Cho , A. T. Crites , M. Crocce , C. E. Cunha , L. N. da Costa , C. B. D'Andrea , C. Davis , T. de Haan , S. Desai , M. A. Dobbs , S. Dodelson , J. P. Dietrich , P. Doel , A. Drlica-Wagner , J. Estrada , W. B. Everett , A. Fausti Neto , B. Flaugher , J. Frieman , J. García-Bellido , E. M. George , E. Gaztanaga , T. Giannantonio , D. Gruen , R. A. Gruendl , J. Gschwend , G. Gutierrez , N. W. Halverson , N. L. Harrington , W. G. Hartley , W. L. Holzapfel , K. Honscheid , J. D. Hrubes , B. Jain , D. J. James , M. Jarvis , T. Jeltema , L. Knox , E. Krause , K. Kuehn , S. Kuhlmann , N. Kuropatkin , O. Lahav , A. T. Lee , E. M. Leitch , T. S. Li , M. Lima , D. Luong-Van , A. Manzotti , M. March , D. P. Marrone , J. L. Marshall , P. Martini , J. J. McMahon , P. Melchior , F. Menanteau , S. S. Meyer , C. J. Miller , R. Miquel , L. M. Mocanu , J. J. Mohr , T. Natoli , B. Nord , R. L. C. Ogando , S. Padin , A. A. Plazas , C. Pryke , D. Rapetti , C. L. Reichardt , A. K. Romer , A. Roodman , J. E. Ruhl , E. Rykoff , M. Sako , E. Sanchez , J. T. Sayre , V. Scarpine , K. K. Schaffer , R. Schindler , M. Schubnell , I. Sevilla-Noarbe , E. Shirokoff , M. Smith , R. C. Smith , M. Soares-Santos , F. Z. Staniszewski , A. Stark , K. Story , E. Suchyta , G. Tarle , D. Thomas , M. A. Troxel , K. Vanderlinde , J. D. Vieira , A. R. Walker , R. Williamson , Y. Zhang , J. Zuntz

Galaxies change their properties as they assemble into clusters. In order to understand the physics behind that, we need to go back in time and observe directly what is occurring in galaxies as they fall into a cluster. We have conducted a…

The CLASH X-ray selected sample of 20 galaxy clusters contains ten brightest cluster galaxies (BCGs) that exhibit significant ($>$5 $\sigma$) extinction-corrected star formation rates (SFRs). Star formation activity is inferred from…

星系天体物理 · 物理学 2015-11-11 Kevin Fogarty , Marc Postman , Thomas Connor , Megan Donahue , John Moustakas

This paper reviews the current status of measurements of galaxy clustering at high redshifts (z > 0.3). The focus is on the inherent limitations in the observation and interpretation of the ``evolution of clustering''. It is likely that…

天体物理学 · 物理学 2007-05-23 C. C. Steidel

We use giga-particle N-body simulations to study galaxy cluster populations in Hubble Volumes of LCDM (Omega_m=0.3, Omega_Lambda=0.7) and tCDM (Omega_m=1) world models. Mapping past light-cones of locations in the computational space, we…

We report weak-lensing masses for 51 of the most X-ray luminous galaxy clusters known. This cluster sample, introduced earlier in this series of papers, spans redshifts 0.15 < z_cl < 0.7, and is well suited to calibrate mass proxies for…

We present a weak-lensing analysis of the z=1.4 galaxy cluster XMMU J2235.3-2557, based on deep Advanced Camera for Surveys images. Despite the observational challenge set by the high redshift of the lens, we detect a substantial lensing…

宇宙学与河外天体物理 · 物理学 2015-05-14 M. J. Jee , P. Rosati , H. C. Ford , K. S. Dawson , C. Lidman , S. Perlmutter , R. Demarco , V. Strazzullo , C. Mullis , H. Böhringer , R. Fassbender

We present new narrow-band H alpha imaging from the Hubble Space Telescope of two redshift 0.91 galaxies that have been lensed by foreground galaxy cluster Abell 2390. These data probe spatial scales as small as 0.3 kpc, providing a…

星系天体物理 · 物理学 2015-06-23 Alice Olmstead , Jane R. Rigby , Mark Swinbank , Sylvain Veilleux

We derive the number density evolution of massive field galaxies in the redshift range 0.4 < z < 1.2 using the K-band selected field galaxy sample from the Munich Near-IR Cluster Survey (MUNICS). We rely on spectroscopically calibrated…

天体物理学 · 物理学 2009-11-07 N. Drory , R. Bender , J. Snigula , G. Feulner , U. Hopp , C. Maraston , G. J. Hill , C. Mendes de Oliveira

We present measurements of the luminosity and color-dependence of galaxy clustering at 0.2<z<1.0 in the PRIsm MUlti-object Survey (PRIMUS). We quantify the clustering with the redshift-space and projected two-point correlation functions,…

We study the global scaling-laws of 51 compact field galaxies with redshifts z = 0.2-1.3 and apparent magnitudes I<23.74 in the flanking fields of the Hubble Deep Field. Roughly 60% of the 45 compact emission-line galaxies have sizes,…

天体物理学 · 物理学 2007-05-23 R. Guzman , A. C. Phillips , J. Gallego , D. C. Koo , J. D. Lowenthal

Using K-band imaging for 15 of the Canadian Network for Observational Cosmology (CNOC1) clusters we examine the near-infrared properties of moderate-redshift (0.19 < z < 0.55) galaxy clusters. We find that the number of K-band selected…

天体物理学 · 物理学 2009-05-11 Adam Muzzin , H. K. C. Yee , Patrick B. Hall , H. Lin

In hierarchical cosmologies the evolution of galaxy clustering depends both on cosmological quantities such as Omega and Lambda, which determine how dark matter halos form and evolve, and on the physical processes - cooling, star formation…

天体物理学 · 物理学 2009-09-25 Guinevere Kauffmann , Joerg M. Colberg , Antonaldo Diaferio , Simon D. M. White

Recent observations of galaxy clusters have shown that environmental effects apparently associated with the cluster begin to lower the star formation rates of galaxies at distances as great as three times the cluster virial radius. These…

宇宙学与河外天体物理 · 物理学 2010-12-07 Laura G. Book , Andrew J. Benson

An extensive redshift survey has been conducted on a sample of 15 nearby (0.01 < z < 0.05) clusters of galaxies. A total number of 860 redshifts were determined by fitting of emission--lines and/or cross-correlation techniques. Of this…

天体物理学 · 物理学 2007-05-23 P. Stein

We present dynamical measurements for 586 H-alpha detected star-forming galaxies from the KMOS (K-band Multi-Object Spectrograph) Redshift One Spectroscopic Survey (KROSS). The sample represents typical star-forming galaxies at this…