Results 121 to 130 of about 68,025 (275)

Filaments of galaxies and Voronoi diagrams

Open Astronomy, 2018
The intersections between a spherical shell and the faces of Voronoi polyhedrons are numerically evaluated. The nodes of these intersections are the points that share the same distances from three nuclei.
Zaninetti Lorenzo
doaj   +1 more source

Chandra Studies of the X-ray Gas Properties of Fossil Systems

, 2015
We study ten galaxy groups and clusters suggested in the literature to be "fossil system (FS)" based on \chandra\ observations. According to the $M_{500}-T$ and $L_{\rm X}-T$ relations, the gas properties of FSs are not physically distinct from ordinary ...
Qin, Zhenzhen
core   +1 more source

Star Clusters in Local Group Galaxies [PDF]

Symposium - International Astronomical Union, 1995
In this paper I will try to give the flavor of two different concepts of stellar population, namely, the population of cluster systems within galaxies, and the stellar populations within individual clusters. I hope to show, in concert with other papers in this volume, that a generic vision of Population I and II has been outdated for a long time.
openaire   +2 more sources

A comprehensive picture of baryons in groups and clusters of galaxies [PDF]

Astronomy & Astrophysics, 2013
(Abridged) Based on XMM-Newton, Chandra and SDSS data, we investigate the baryon distribution in groups and clusters and its use as a cosmological constraint. For this, we considered a sample of 123 systems, with total masses in the mass range M500 = ~ 10^13 - 4 x 10^15 h_70^-1 Msun. The gas masses and total masses are derived from X-ray data under the
Laganá, T., Martinet, N., Durret, F., Lima Neto, G., Maughan, B., Zhang, Y.-Y.   +5 more
openaire   +5 more sources

Some Properties of Galaxy Structures

Open Astronomy, 2011
We analysed some properties of galaxies structures based on the PF catalog of galaxy structures (Panko & Flin 2006) and the Tully NBG catalog (Tully 1988).
Flin Piotr, Biernacka Monika, Godłowski Włodzimierz, Panko Elena, Piwowarska Paulina   +4 more
doaj   +1 more source

LoCuSS: Luminous infrared galaxies in the merging cluster Abell 1758 at z=0.28 [PDF]

, 2009
We present the first galaxy evolution results from the Local Cluster Substructure Survey (LoCuSS), a multi-wavelength survey of 100 X-ray selected galaxy clusters at 0 ...
Bai, Baldwin, Ball, Bertin, Biviano, Boselli, Bruzual, Butcher, Butcher, Böhringer, C. P. Haines, Caldwell, Calzetti, Casali, Coia, Coia, Cowie, Czoske, David, De Propris, Desai, Dressler, Dressler, Dressler, Driver, Duc, Duc, E. Egami, Ebeling, Ebeling, Egami, Fadda, G. P. Smith, Gallazzi, Geach, Gehrels, Gordon, Haines, Haines, Hickox, Holden, K. Umetsu, Kennicutt, Kneib, La Barbera, Lawrence, Le Floc'h, Le Fèvre, Lewis, Limousin, Lonsdale, M. Takada, Marcillac, Martini, Metcalfe, Metcalfe, Miller, Miller, Miyazaki, Moran, Muzzin, N. Okabe, Navarro, Okabe, Owen, Poggianti, Postman, R. S. Ellis, Rieke, Roettiger, S. M. Moran, Saintonge, Silverman, Smail, Smith, Smith, Swinbank, Tanaka, Tomita, Tonnesen, Tremonti, Treu, Werner, Wolf, Zhang   +84 more
core   +3 more sources

Infalling groups and galaxy transformations in the cluster A2142 [PDF]

Astronomy & Astrophysics, 2018
Context.Superclusters of galaxies provide dynamical environments for the study of the formation and evolution of structures in the cosmic web from galaxies, to the richest galaxy clusters, and superclusters themselves.Aims.We study galaxy populations and search for possible merging substructures in the rich galaxy cluster A2142 in the collapsing core ...
Elmo Tempel, Elmo Tempel, Boris Deshev, Boris Deshev, Enn Saar, Enn Saar, Mirt Gramann, Heidi Lietzen, Changbom Park, Pekka Heinämäki, Jaan Einasto, Jaan Einasto, Maret Einasto, Rain Kipper   +13 more
openaire   +4 more sources

Discovering Large-scale Structure at 2 < z < 5 in the C3VO Survey

The Astrophysical Journal
The Charting Cluster Construction with VUDS and ORELSE (C3VO) survey is an ongoing imaging and spectroscopic campaign aiming to map out the growth of structure up to z  ∼ 5 and was born from the combination of the Visible Multi-Object Spectrograph Ultra ...
Denise Hung, Brian C. Lemaux, Olga Cucciati, Ben Forrest, Ekta A. Shah, Roy R. Gal, Finn Giddings, Derek Sikorski, Emmet Golden-Marx, Lori M. Lubin, Nimish Hathi, Giovanni Zamorani, Lu Shen, Sandro Bardelli, Letizia P. Cassarà, Gabriella De Lucia, Fabio Fontanot, Bianca Garilli, Lucia Guaita, Michaela Monika Hirschmann, Kyoung-Soo Lee, Andrew B. Newman, Vandana Ramakrishnan, Daniela Vergani, Lizhi Xie, Elena Zucca   +25 more
doaj   +1 more source

Extended Radio Emission in the Perhipheral Regions of the Shapley Concentration Core

Galaxies, 2017
The Shapley Concentration (SC) is a galaxy supercluster (few tens of degrees) in the Local Universe (<z>∼0.048) which is currently undergoing cluster mergers and group accretion.
Tiziana Venturi, Sandro Bardelli, Daniele Dallacasa, Gabriella Di Gennaro, Fabio Gastaldello, Simona Giacintucci, Mariachiara Rossetti   +6 more
doaj   +1 more source

Simulations of AGN Feedback in Galaxy Clusters and Groups [PDF]

AIP Conference Proceedings, 2009
4 pages, 2 figures, To appear in proceedings of the conference "The Monster's Fiery Breath: Feedback in Galaxies, Groups, and Clusters", June 2009, Madison ...
Ewald Puchwein, Debora Sijacki, Volker Springel, Sebastian Heinz, Eric Wilcots   +4 more
openaire   +3 more sources