Results 71 to 80 of about 67,335 (316)

Entropy Evolution in Galaxy Groups and Clusters: a Comparison of External and Internal Heating [PDF]

, 2001
The entropy in hot, X-ray-emitting gas in galaxy groups and clusters is a measure of past heating events, except for the entropy lost by radiation from denser regions.
F. Brighenti, W. Mathews
semanticscholar   +1 more source

X-RAY EMISSION AND ORIENTATION OF SELECTED PF GALAXY CLUSTERS

Odessa Astronomical Publications, 2016
X-ray counterparts for 35 galaxy clusters contained in the PF catalogue of galaxy clusters and groups were found in XMM-Newton archive. 22 ones (all from ACO catalogue) have extended elliptic X-ray haloes appropriate for determination of orientation ...
A. V. Tugay, S. S. Dylda, E. A. Panko
doaj   +1 more source

HEATING THE HOT ATMOSPHERES OF GALAXY GROUPS AND CLUSTERS WITH CAVITIES: THE RELATIONSHIP BETWEEN JET POWER AND LOW-FREQUENCY RADIO EMISSION [PDF]

, 2011
We present scaling relations between jet power and radio power measured using the Giant Metrewave Radio Telescope (GMRT), Chandra, and XMM-Newton, for a sample of nine galaxy groups combined with the Bîrzan et al. sample of clusters. Cavity power is used
E. O’Sullivan, S. Giacintucci, L. David, M. Gitti, J. Vrtilek, Somak Raychaudhury, T. Ponman   +6 more
semanticscholar   +1 more source

Galaxy Superclusters Detected in the Modified PF-Catalog Using the FOF Method

Open Astronomy, 2011
The Modified Catalog of Galaxy Clusters and Groups (Panko & Flin 2006, PF), covering an area of 5000 square degrees in the southern sky, was used as the input for the search of galaxy superclusters.
Panko E.
doaj   +1 more source

The galaxy environment in GAMA G3C groups using the Kilo Degree Survey Data Release 3 [PDF]

, 2018
We aim to investigate the galaxy environment in GAMA Galaxy Groups Catalogue (G3C) using a volume-limited galaxy sample from the Kilo Degree Survey Data Release 3.
Bilicki, M., Brouwer, M. M., Buddelmeijer, H., Costa-Duarte, M. V., de Jong, J. T. A., Getman, F., Grado, A., Kleijn, G. V., Kuijken, K., Molino, A., Napolitano, N., Puddu, E., Radovich, M., Sodré Jr., L., Vakili, M., Viola, M.   +15 more
core   +5 more sources

Mock Observations: Formation and Evolution of Diffuse Light in Galaxy Groups and Clusters in the IllustrisTNG Simulations

The Astrophysical Journal, 2023
In this paper, by analyzing mock images from the IllustrisTNG100-1 simulation, we examine the properties of diffuse light and compare them to those of central and satellite galaxies.
Lin Tang, Weipeng Lin, Yang Wang, Jing Li, Yanyao Lan   +4 more
doaj   +1 more source

Radio galaxy feedback in X-ray selected groups from COSMOS: the effect on the ICM [PDF]

, 2010
We quantify the importance of the mechanical energy released by radio-galaxies inside galaxy groups. We use scaling relations to estimate the mechanical energy released by 16 radio-AGN located inside X-ray detected galaxy groups in the COSMOS field.
A. Finoguenov, A. M. Koekemoer, A. Oklopčić, Bîrzan, Bîrzan, Condon, D. B. Sanders, D. Pierini, D. Thompson, De Young, Donahue, Drory, Dunkley, E. Schinnerer, Finoguenov, G. W. Pratt, G. Zamorani, Giodini, Gitti, H. Boehringer, Heinz, Ilbert, J. S. Kartaltepe, L. Bîrzan, Leauthaud, Lin, M. Salvato, Markevitch, Peterson, Pratt, Puchwein, R. Massey, Reiprich, S. Giodini, Salvato, Schinnerer, Scoville, Short, Skrutskie, Smolčić, Smolčić, Sun, V. Smolčić, Voit, Wright   +44 more
core   +4 more sources

Shell-like structures in our cosmic neighbourhood

, 2016
Signatures of the processes in the early Universe are imprinted in the cosmic web. Some of them may define shell-like structures characterised by typical scales.
Arnalte-Mur, P., Einasto, J., Einasto, M., Heinämäki, P., Hurtado-Gil, L., Liivamägi, L. J., Martinez, V. J., Nurmi, P., Saar, E.   +8 more
core   +1 more source

Mind the Gap: Tightening the Mass-Richness Relation with Magnitude Gaps [PDF]

, 2013
We investigate the potential to improve optical tracers of cluster mass by exploiting measurements of the magnitude gap, m12, defined as the difference between the r-band absolute magnitude of the two brightest cluster members.
Abazajian, Allen, Andreas A. Berlind, Andrew P. Hearin, Andrew R. Zentner, Becker, Behroozi, Berlind, Blanton, Conroy, D'Onghia, Gladders, Hearin, Jeffrey A. Newman, Jones, Klypin, Koester, Kravtsov, Newman, Paranjape, Proctor, Reyes, Riebe, Rozo, Rozo, Rykoff, Skibba, Tinker, Trujillo-Gomez, Watson, Weinberg, Wu, Yang, Zentner   +33 more
core   +1 more source

Physical Implications of the X-ray Properties of Galaxy Groups and Clusters [PDF]

, 2001
Within the standard framework of structure formation, where clusters and groups of galaxies are built up from the merging of smaller systems, the physical properties of the intracluster medium, such as the gas temperature and the total X-ray luminosity ...
A. Babul, M. Balogh, G. Lewis, G. Poole
semanticscholar   +1 more source