Results 141 to 150 of about 91,719 (307)

Powerful Yet Lonely: Is 3C 297 a High-redshift Fossil Group?

The Astrophysical Journal Supplement Series, 2022
The environment of the high-redshift ( z = 1.408), powerful radio-loud galaxy 3C 297 has several distinctive features of a galaxy cluster. Among them, a characteristic halo of hot gas revealed by Chandra X-ray observations.
Valentina Missaglia, Juan P. Madrid, Mischa Schirmer, Francesco Massaro, Alberto Rodríguez-Ardila, Carlos J. Donzelli, Martell Valencia, Alessandro Paggi, Ralph P. Kraft, Chiara Stuardi, Belinda J. Wilkes   +10 more
doaj   +1 more source

Lopsidedness of cluster galaxies in modified gravity

, 2010
We point out an interesting theoretical prediction for elliptical galaxies residing inside galaxy clusters in the framework of modified Newtonian dynamics (MOND), that could be used to test this paradigm.
A. Knebe, Benoit Famaey, C. Llinares, F. Combes, F. Donato ., G. Gentile, G.W. Angus, H. Zhao, HongSheng Zhao, L. Ciotti, P. Londrillo, P.J.E. Peebles, S.S. McGaugh, Xufen Wu   +13 more
core   +2 more sources

Properties of the Brightest Cluster Galaxy and Its Host Cluster [PDF]

, 2002
We investigate the relation between the properties of brightest cluster galaxies (BCGs) and those of their host clusters. To quantify the properties of cluster hot gas, we employ the parameter Z of the fundamental plane of X-ray clusters.
H. Katayama, K. Hayashida, F. Takahara, Y. Fujita   +3 more
semanticscholar   +1 more source

Reassessing the Relationship Between Meteor Radio Afterglows and Optical Persistent Trains

Journal of Geophysical Research: Space Physics, Volume 130, Issue 9, September 2025.
Abstract Meteor radio afterglows (MRAs) and optical persistent trains (PTs) are two types of long‐lived phenomena which are occasionally observed following the occurrence of a meteor. Both phenomena are thought to be produced by intrinsic emission mechanisms; PTs have been associated with chemiluminescent reactions between meteoric metals and ...
L. E. Cordonnier, K. S. Obenberger, G. B. Taylor, J. M. Holmes, J. Dowell, D. Vida   +5 more
wiley   +1 more source

Selecting Clusters and Protoclusters via Stellar Mass Density. I. Method and Tests on Mock HSC-SSP Catalogs

The Astrophysical Journal
We present an algorithm designed to identify galaxy (proto)clusters in wide-area photometric surveys by first selecting their dominant galaxy—i.e., the brightest cluster galaxy (BCG) or protoBCG—through the local stellar mass density traced by massive ...
Marcelo C. Vicentin, Pablo Araya-Araya, Laerte Sodré Jr., Michael A. Strauss   +3 more
doaj   +1 more source

Two Micron‐Size Dark Dimensions

Fortschritte der Physik, Volume 73, Issue 8, August 2025.
Abstract Two extra dimensions of micron scale might simultaneously address the gauge and cosmological hierarchy problems. In this paper various observational bounds in scenarios with one and two large extra dimensions are examined, to see if they are compatible with the micron scale.
Luis A. Anchordoqui, Ignatios Antoniadis, Dieter Lüst   +2 more
wiley   +1 more source

The luminosity–halo mass relation for brightest cluster galaxies [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2008
Abstract We examine the central galaxy luminosity–host halo mass relation for 54 brightest group galaxies (BGGs) and 92 brightest cluster galaxies (BCGs) at z < 0.1 and present the first measurement of this relation for a sample of known BCGs at .
Brough, S., Couch, W. J., Collins, Chris A., Jarrett, Thomas H., Burke, Douglas J., Mann, Robert G.   +5 more
openaire   +3 more sources

LoVoCCS. II. Weak Lensing Mass Distributions, Red-sequence Galaxy Distributions, and Their Alignment with the Brightest Cluster Galaxy in 58 Nearby X-Ray-luminous Galaxy Clusters

The Astrophysical Journal
The Local Volume Complete Cluster Survey is an ongoing program to observe nearly a hundred low-redshift X-ray-luminous galaxy clusters (redshifts 0.03 < z < 0.12 and X-ray luminosities in the 0.1–2.4 keV band L _X500c > 10 ^44 erg s ^−1 ) with the Dark ...
Shenming Fu, Ian Dell’Antonio, Zacharias Escalante, Jessica Nelson, Anthony Englert, Søren Helhoski, Rahul Shinde, Julia Brockland, Philip LaDuca, Christelyn Larkin, Lucca Paris, Shane Weiner, William K. Black, Ranga-Ram Chary, Douglas Clowe, M. C. Cooper, Megan Donahue, August Evrard, Mark Lacy, Tod Lauer, Binyang Liu, Jacqueline McCleary, Massimo Meneghetti, Hironao Miyatake, Mireia Montes, Priyamvada Natarajan, Michelle Ntampaka, Elena Pierpaoli, Marc Postman, Jubee Sohn, David Turner, Keiichi Umetsu, Yousuke Utsumi, Gillian Wilson   +33 more
doaj   +1 more source

Cross-correlation Weak Lensing of SDSS galaxy Clusters II: Cluster Density Profiles and the Mass--Richness Relation [PDF]

, 2007
We interpret and model the statistical weak lensing measurements around 130,000 groups and clusters of galaxies in the Sloan Digital Sky Survey presented by Sheldon et al. 2007 (Paper I).
Annis, James, Becker, Matthew R., Evrard, August E., Frieman, Joshua A., Johnston, David E., Koester, Benjamin P., McKay, Timothy A., Rozo, Eduardo, Sheldon, Erin S., Wechsler, Risa H.   +9 more
core   +3 more sources

Revisiting Brightest Cluster Galaxy Evolution with the Las Campanas Distant Cluster Survey [PDF]

, 2001
We investigate the influence of environment on brightest cluster galaxy (BCG) evolution using a sample of 63 clusters at 0.3 ≤ z ≤ 0.9 drawn primarily from the Las Campanas Distant Cluster Survey and follow-up V, I, and K' photometry.
A. Nelson, Anthony H. Gonzalez, D. Zaritsky, J. Dalcanton   +3 more
semanticscholar   +1 more source