Results 31 to 40 of about 69,592 (217)

INDIVIDUAL AND GROUP GALAXIES IN CNOC1 CLUSTERS [PDF]

The Astrophysical Journal, 2009
ApJ ...
Li, I. H., Yee, H. K. C., Ellingson, E.
openaire   +3 more sources

Dynamical segregation of galaxies into groups and clusters [PDF]

Monthly Notices of the Royal Astronomical Society, 2004
We have performed a systematic analysis of the dynamics of different galaxy populations in galaxy groups from the 2dFGRS. For this purpose we have combined all the groups into a single system, where velocities v and radius r are expressed adimensionally.
Lares, M., Lambas, D. G., Sanchez, A. G.
openaire   +2 more sources

Galaxy structures — groups, clusters and superclusters [PDF]

International Journal of Geometric Methods in Modern Physics, 2014
We provide a brief summary of the history of galaxy structure studies. We also introduce several large-scale redshift surveys and summarize the most commonly used methods to identify the groups and clusters of galaxies. We present several catalogs of galaxy groups. These catalogs can be used to study the galaxy groups in different environments.
Sepp, Tiit, Gramann, Mirt
openaire   +2 more sources

Galaxy evolution in groups and clusters: star formation rates, red sequence fractions and the persistent bimodality [PDF]

, 2011
Using galaxy group/cluster catalogues created from the Sloan Digital Sky Survey Data Release 7, we examine in detail the specific star formation rate (SSFR) distribution of satellite galaxies and its dependence on stellar mass, host halo mass and halo ...
A. Wetzel, J. Tinker, C. Conroy
semanticscholar   +1 more source

The eROSITA Final Equatorial-Depth Survey (eFEDS): The catalog of galaxy clusters and groups [PDF]

Astronomy & Astrophysics, 2021
The eROSITA Final Equatorial-Depth Survey has been carried out during the PV phase of the SRG/eROSITA telescope and completed in November 2019. This survey is designed to provide the first eROSITA-selected sample of galaxy clusters and groups and to test
A. Liu, E. Bulbul, V. Ghirardini, T. Liu, M. Klein, N. Clerc, Y. Oezsoy, M. Ramos-Ceja, F. Pacaud, J. Comparat, N. Okabe, Y. Bahar, V. Biffi, H. Brunner, M. Brueggen, J. Buchner, J. I. Chitham, I. Chiu, K. Dolag, E. Gatuzz, J. González, D. Hoang, G. Lamer, A. Merloni, K. Nandra, M. Oguri, N. Ota, P. Predehl, T. Reiprich, M. Salvato, T. Schrabback, Jeremy S. Sanders, R. Seppi, Q. Thibaud   +33 more
semanticscholar   +1 more source

THE EFFECT OF ENVIRONMENT ON THE FORMATION OF Hα FILAMENTS AND COOL CORES IN GALAXY GROUPS AND CLUSTERS [PDF]

, 2011
We present the results of a combined X-ray and Hα study of 10 galaxy groups and 17 galaxy clusters using the Chandra X-ray Observatory and the Maryland Magellan Tunable Filter.
M. McDonald, S. Veilleux, R. Mushotzky
semanticscholar   +1 more source

AGN Feedback in Groups and Clusters of Galaxies

, 2022
AGN feedback stands for the dramatic impact that a SMBH can make on its environment. It has become an essential element of models that describe the formation and evolution of baryons in massive virialized halos. The baryons' radiative losses in the cores of these halos might lead to massive cooling and vigorous star formation on the order of 10-1000 ...
Hlavacek-Larrondo, J., Li, Y., Churazov, E.   +2 more
openaire   +3 more sources

ON THE BARYON FRACTIONS IN CLUSTERS AND GROUPS OF GALAXIES [PDF]

The Astrophysical Journal, 2010
We present the baryon fractions of 2MASS groups and clusters as a function of cluster richness using total and gas masses measured from stacked ROSAT X-ray data and stellar masses estimated from the infrared galaxy catalogs. We detect X-ray emission even in the outskirts of clusters, beyond r_200 for richness classes with X-ray temperatures above 1 keV.
Dai, Xinyu, Bregman, Joel N., Kochanek, Christopher S., Rasia, Elena   +3 more
openaire   +2 more sources

The similarity of the stellar mass fractions of galaxy groups and clusters [PDF]

, 2013
We employ a large sample of 20171 optically-selected groups and clusters at 0.15 < z < 0.4 in the SDSS to investigate how the stacked stellar mass fraction varies across a wide range of total mass, $M_{500}$.
J. M. Budzynski, Sergey E. Koposov, I. McCarthy, V. Belokurov   +3 more
semanticscholar   +1 more source

Exploring diffuse radio emission in galaxy clusters and groups with uGMRT and SKA [PDF]

Journal of astrophysics and astronomy, 2022
Diffuse radio emission has been detected in a considerable number of galaxy clusters and groups, revealing the presence of pervasive cosmic magnetic fields, and of relativistic particles in the large scale structure of the Universe.
S. Paul, R. Kale, A. Datta, A. Basu, S. Sur, V. Parekh, P. Gupta, S. Chatterjee, S. Salunkhe, A. Iqbal, M. Pandey-Pommier, R. Raja, M. Rahaman, Somak Raychaudhury, B. Nath, S. Majumdar   +15 more
semanticscholar   +1 more source