Results 131 to 140 of about 88,791 (299)

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

The ACS Nearby Galaxy Survey Treasury. X. Quantifying the Star Cluster Formation Efficiency of Nearby Dwarf Galaxies

, 2012
We study the relationship between the field star formation and cluster formation properties in a large sample of nearby dwarf galaxies. We use optical data from the Hubble Space Telescope and from ground-based telescopes to derive the ages and masses of ...
Anil C. Seth, Bastian, Bertelli, Billett, Boselli, Bressan, Bressert, Buat, Chandar, Chandar, Chandar, Charles W. Engelbracht, da Silva, Dalcanton, Dale, Dale, Daniel A. Dale, Daniel R. Weisz, David O. Cook, Dohm-Palmer, Evans, Fall, Fall, Fioc, Fouesneau, Fumagalli, Gieles, Girardi, Goddard, Groenewegen, Hunter, Hunter, Hunter, Hénon, Julianne J. Dalcanton, Karachentsev, Kennicutt, Knut A. G. Olsen, Kroupa, L. Clifton Johnson, Larsen, Larsen, Lee, Lee, Leroy, Marble, Maíz Apellániz, McCrady, McQuinn, Meurer, Morgan Fouesneau, Moustakas, Muñoz-Mateos, Popescu, Porras, Schlegel, Weisz, Weisz, Weisz, Whitmore, Whitmore, Zhang   +61 more
core   +1 more source

The link between morphology and structure of brightest cluster galaxies: automatic identification of cDs [PDF]

, 2015
We study a large sample of 625 low-redshift brightest cluster galaxies (BCGs) and link their morphologies to their structural properties. We derive visual morphologies and find that ∼57 per cent of the BCGs are cD galaxies, ∼13 per cent are ellipticals ...
Dongyao Zhao, A. Arag'on-Salamanca, C. Conselice   +2 more
semanticscholar   +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

The Growth in Size and Mass of Cluster Galaxies since z=2

, 2013
We study the formation and evolution of Brightest Cluster Galaxies starting from a $z=2$ population of quiescent ellipticals and following them to $z=0$.
Gao, Liang, Laporte, Chervin F. P., Naab, Thorsten, White, Simon D. M.   +3 more
core   +1 more source

The luminosity function of cluster galaxies. II. Data reduction procedures applied to the cluster Abell 496 [PDF]

, 1999
We initiated a large project aimed to estimate the Luminosity Function of galaxies in clusters and to evaluate its relation to cluster morphology. With this paper we deem necessary to outline the general procedures of the data reduction and details of ...
Chincarini, G., De Grandi, S., Molinari, E., Moretti, A.   +3 more
core   +2 more sources

The accretion histories of brightest cluster galaxies from their stellar population gradients [PDF]

, 2015
We analyse the spatially-resolved stellar populations of 9 local (z 10 11:3 M ) from the ATLAS 3D survey (median [Z/H] = 0:04 0:07, [Z/H] = 0:19 0:1). However, massive early-type galaxies from ATLAS 3D have consistently old ages (median Age = 12:0 3:8 ...
P. Oliva-Altamirano, S. Brough, Jimmy, K. Tran, W. Couch, R. McDermid, C. Lidman, A. V. D. Linden, Rob Sharp Centre for AstrophysicsSupercomputing, P. SwinburneUniversityofTechnology.AustralianAstronom, C. M. S. I. F. T. Physics, Astronomy, D. Physics, T. F. D. O. PhysicsAstronomy, Macquarie University. Dark Cosmology Centre, Niels Bohr Institute, U. O. O. Astrophysics, Cosmology, S. W. S. O. Physics, S. A. I. O. AstronomyAstrophysics, Australian National University   +20 more
semanticscholar   +1 more source

Deep Space Network Radio Science and Ground‐Based Planetary Radar in the Next Decade

Radio Science, Volume 60, Issue 7, July 2025.
Abstract The Deep Space Network (DSN) has been a core operational element of NASA's crewed and robotic exploration of the Solar System since the early 1960s. The primary role of the DSN has been to acquire telemetry and navigation data, but over the years, its radiometric and radar capabilities have expanded to form a system for obtaining unique ...
R. S. Park, J. E. Riedel, N. Rodriguez‐Alvarez, M. Brozovic, L. A. M. Benner, P. Vergados, D. Buccino, C. S. Jacobs, L. S. Locke, S. W. Asmar, R. Castano, T. J. W. Lazio, J. Jao, C. Lee   +13 more
wiley   +1 more source

The Intracluster Light of Abell 3667: Unveiling an Optical Bridge in LSST Precursor Data

The Astrophysical Journal Letters
Intracluster light (ICL), the diffuse glow of stars stripped from galaxies during a cluster’s formation, is an established tracer of a cluster’s dynamical history. The upcoming Vera C.
Anthony M. Englert, Ian Dell’Antonio, Mireia Montes   +2 more
doaj   +1 more source