Results 1 to 10 of about 153,282 (200)

Detection of anti-correlation of hot and cold baryons in galaxy clusters [PDF]

Nature Communications, 2019
Galaxy clusters contain vast amount of dark matter and baryonic matter. Here the authors show the observational detection of the anti-correlation of gas mass and stellar mass observables in the most massive galaxy clusters, indicating such clusters ...
Arya Farahi, Sarah L. Mulroy, August E. Evrard, Graham P. Smith, Alexis Finoguenov, Hervé Bourdin, John E. Carlstrom, Chris P. Haines, Daniel P. Marrone, Rossella Martino, Pasquale Mazzotta, Christine O’Donnell, Nobuhiro Okabe   +12 more
doaj   +2 more sources

Optical Photometric Indicators of Galaxy Cluster Relaxation [PDF]

The Astrophysical Journal
The most dynamically relaxed clusters of galaxies play a special role in cosmological studies as well as astrophysical studies of the intracluster medium (ICM) and active galactic nucleus feedback.
Madeline C. Casas, Ky Putnam, Adam B. Mantz, Steven W. Allen, Taweewat Somboonpanyakul   +4 more
doaj   +2 more sources

THE ROLE OF POOR GALAXY CLUSTERS FOR STUDYING SUPERCLUSTER STRUCTURE

Odessa Astronomical Publications, 2008
The distribution of galaxy clusters is analyzed in regions of 6 galaxy superclusters with both measured and estimated redshifts. The positions of ACO and APM galaxy clusters in the regions are compared with the positions of galaxy clusters and groups ...
E. A. Panko
doaj   +1 more source

THE PECULIARITIES IN O-TYPE GALAXY CLUSTERS

Odessa Astronomical Publications, 2017
We present the results of analysis of 2D distribution of galaxies in galaxy cluster fields. The Catalogue of Galaxy Clusters and Groups PF (Panko & Flin) was used as input observational data set.
E. A. Panko, S. I. Emelyanov
doaj   +1 more source

The Halo Mass–Temperature Relation for Clusters, Groups, and Galaxies

The Astrophysical Journal, 2023
The halo mass–temperature ( M – T ) relation for a sample of 216 galaxy clusters, groups, and individual galaxies observed by the Chandra X-ray Observatory is presented.
Iurii V. Babyk, Brian R. McNamara
doaj   +1 more source

Cluster detection from surface-brightness fluctuations in SDSS data [PDF]

, 2001
Galaxy clusters can be detected as surface brightness enhancements in smoothed optical surveys. This method does not require individual galaxies to be identifiable, and enables clusters to be detected out to surprisingly high redshifts, as recently ...
Aragón-Salamanca, Bahcall, Bahcall, Bartelmann, Brainerd, Carlberg, Carlberg, Carlberg, Dalcanton, Fukugita, Gonzalez, Hoessel, M. Bartelmann, Metcalfe, Navarro, Navarro, Postman, Postman, S. D. M. White, Schneider, van Dokkum, van Dokkum, Woods, Zaritsky, Zaritsky   +24 more
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DISCRETE X-RAY SOURCES IN GALAXY CLUSTERS

Odessa Astronomical Publications, 2020
Current studies of extragalactic X-ray sources using data from orbital observatory XMM- Newton are at the front line of X-ray astronomy. Resolution capacity of the observatory instruments enable to detect separate X-ray sources in the close galaxies.
A. V. Tugay, L. V. Zadorozhna, S. Yu. Shevchenko   +2 more
doaj   +1 more source

Low X-Ray Luminosity Galaxy Clusters: Main goals, sample selection, photometric and spectroscopic observations [PDF]

, 2016
We present the study of nineteen low X-ray luminosity galaxy clusters (L$_X \sim$ 0.5--45 $\times$ $10^{43}$ erg s$^{-1}$), selected from the ROSAT Position Sensitive Proportional Counters (PSPC) Pointed Observations (Vikhlinin et al.
Alonso, M. V., Astudillo, J. M., Carrasco, E. R., Castellón, J. L. Nilo, Cuevas, H., Jaque, M., Lambas, D. García, Mill, A. L. O', Ramos, F., Ramírez, A., Ulloa, N., Valotto, Carlos, Órdenes, Y.   +12 more
core   +3 more sources

LINEAR SUBSTRUCTURES IN GALAXY CLUSTERS

Odessa Astronomical Publications, 2019
We propose detailed scheme that is describing the morphology of linear substructures in galaxy clusters. Our base morphological scheme di- vides galaxy clusters using numerical criteria according the parameters: concentration to the cluster center, the ...
E. Panko, V. Korshunov, S. Yemelianov, V. Zabolotnii   +3 more
doaj   +1 more source

The Environmental Dependence of the Evolving S0 Fraction [PDF]

, 2010
We reinvestigate the dramatic rise in the S0 fraction, f_S0, within clusters since z ~ 0.5. In particular, we focus on the role of the global galaxy environment on f_S0 by compiling, either from our own observations or the literature, robust line-of ...
Andreon, Balogh, Balogh, Bekki, Christlein, Couch, Couch, David J. Sand, Dennis W. Just, Dennis Zaritsky, Desai, Dressler, Fasano, Finn, Gregory Rudnick, Hinz, Icke, Kannappan, Kautsch, Kendall, Mihos, Moore, Moran, Papovich, Poggianti, Poggianti, Poggianti, Postman, Sandage, Smail, Smith, Tran, Vandana Desai, Wechsler, Wilman, Yang, Yang, Zabludoff, Zabludoff   +38 more
core   +2 more sources