Results 61 to 70 of about 60,718 (195)

THERMAL AND CHEMICAL EVOLUTIONS OF GALAXY CLUSTERS OBSERVED WITH SUZAKU

Acta Polytechnica, 2013
We studied the properties of the intracluster medium (ICM) of galaxy clusters to outer regions observed with Suzaku. The observed temperature dropped by about ~30% from the central region to the virial radius of the clusters.
Kosuke Sato, Kyoko Matsushita, Yoshitaka Ishisaki, Noriko Y. Yamasaki, Takaya Ohashi   +4 more
doaj   +1 more source

Calibrating Galaxy Infall Times in Groups and Clusters with IllustrisTNG Simulations

The Astrophysical Journal
The time since a galaxy first became a satellite is central to understanding how environment drives galaxy evolution, yet it cannot be measured directly.
Florine Masson, Laura C. Parker
doaj   +1 more source

Galaxy Cluster Environments of Radio Sources

, 2011
Using the Sloan Digital Sky Survey (SDSS) and the FIRST (Faint Images of the Radio Sky at Twenty Centimeters) catalogs, we examined the optical environments around double-lobed radio sources. Previous studies have shown that multi-component radio sources
Abazajian, Ascasibar, Bahcall, Blanc, Blanton, Blanton, Blanton, Blanton, Blanton, Blanton, Bower, Bradač, Brodwin, Budavári, Burns, Clarke, Condon, Croft, Csabai, Daddi, Dalton, Deltorn, Dickinson, D’Onghia, Elizabeth L. Blanton, Fanaroff, Gal, Garilli, Gladders, Gladders, Gladders, Gómez, Ivezić, Jee, Joshua D. Wing, Koester, Koester, Krick, Lin, Lin, Lin, Lumsden, Martini, McMahon, Menanteau, Miller, Oklopčić, Ostrander, Owen, Oyaizu, Proctor, Reiprich, Roettiger, Sarazin, Schlegel, Smith, Smolčić, Vanderlinde, Vikhlinin, Voges, Wen, York, Zirbel, Zwicky   +63 more
core   +1 more source

Observational Mass-to-Light Ratio of Galaxy Systems: from Poor Groups to Rich Clusters [PDF]

, 2001
We study the mass-to-light ratio of galaxy systems from poor groups to rich clusters, and present for the first time a large database for useful comparisons with theoretical predictions.
Adami C., Adami C., Andreon S., Bottinelli L., Colless M., Danese L., Durret F., Efstathiou G., Eke V. R., Fioc M., Fritsch C., Fusun Limboz, Gavazzi G., Giuliano Giuricin, Giuricin G., Gourgoulhon E., Heydon-Dumbleton N. H., Jansen R. A., Katgert P., Lumsden S. L., Maddox S. J., Marino Mezzetti, Marisa Girardi, Metcalfe N., Patrizia Manzato, Pisani A., Pisani A., Rauzy S., Rees M. J., Schaeffer R., Schindler S., Shanks T., Wamsteker W., Zwicky F.   +33 more
core   +2 more sources

The Observations of Redshift Evolution in Large-Scale Environments (ORELSE) Survey. I. The Survey Design and First Results on CL 0023+0423 at z = 0.84 and RX J1821.6+6827 at z = 0.82 [PDF]

, 2009
We present the Observations of Redshift Evolution in Large-Scale Environments (ORELSE) Survey, a systematic search for structure on scales greater than 10 h^(–1)_70 Mpc around 20 well-known clusters at redshifts of 0.6 < z < 1.3.
Gal, R. R., Kocevski, D. D., Lemaux, B. C., Lubin, L. M., Squires, G. K.   +4 more
core   +2 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

In medio stat virtus: Enrichment history in poor galaxy clusters

Astronomy & Astrophysics
The enrichment history of galaxy clusters and groups remains far from being fully understood. Recent measurements in massive clusters have revealed remarkably flat iron abundance profiles out to the outskirts, suggesting that similar enrichment processes
Riva G., Ghizzardi S., Molendi S., Balboni M., Bartalucci I., De Grandi S., Gastaldello F., Lovisari L., Rossetti M.   +8 more
doaj   +1 more source

HICOSMO - Cosmology with a complete sample of galaxy clusters: I. Data analysis, sample selection and luminosity-mass scaling-relation

, 2017
The X-ray regime, where the most massive visible component of galaxy clusters, the intra cluster medium (ICM), is visible, offers directly measured quantities, like the luminosity, and derived quantities, like the total mass, to characterize these ...
Reiprich, T. H., Schellenberger, G.
core   +1 more source

Density profiles of galaxy groups and clusters from SDSS galaxy-galaxy weak lensing [PDF]

Monthly Notices of the Royal Astronomical Society, 2006
We present results of a measurement of the shape of the density profile of galaxy groups and clusters traced by 43 335 Luminous Red Galaxies (LRGs) with spectroscopic redshifts from the Sloan Digital Sky Survey (SDSS). The galaxies are selected such that they are the brightest within a cylindrical aperture, split into two luminosity samples, and ...
Mandelbaum, Rachel, Seljak, Uros, Cool, Richard J., Blanton, Michael, Hirata, Christopher M., Brinkmann, Jonathan   +5 more
openaire   +2 more sources

Cosmological Simulations of Galaxy Groups and Clusters. III. Constraining Quasar Feedback Models with the Atacama Large Millimeter Array

The Astrophysical Journal, 2023
The thermal Sunyaev–Zeldovich (SZ) effect serves as a direct potential probe of the energetic outflows from quasars that are responsible for heating the intergalactic medium.
Avinanda Chakraborty, Suchetana Chatterjee, Mark Lacy, Soumya Roy, Samrat Roy, Rudrani Kar Chowdhury   +5 more
doaj   +1 more source