Results 111 to 120 of about 60,555 (229)
The Astrophysical JournalRecent studies have highlighted the potential of intracluster light (ICL) as a dark matter tracer. Moreover, ICL coevolves with the brightest cluster galaxy (BCG) and the host cluster, making it a valuable tool for understanding cluster dynamics. In this
Jaewon Yoo +6 more
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The shapes of brightest cluster galaxies
The Astrophysical Journal, 1993 The mean isophotal axis ratios are computed for a complete sample of 119 brightest cluster galaxies (BCGs) in Abell clusters. The cumulative distribution function F(q) of axis ratios for the BCGs differs from F(q) for a sample of ordinary elliptical galaxies at only the P=0.14 probability level, as measured by a Kolmogorov Smirnov test.
Barbara S. Ryden +2 more
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STAR FORMATION ACTIVITY IN CLASH BRIGHTEST CLUSTER GALAXIES [PDF]
The Astrophysical Journal, 2015 The CLASH X-ray selected sample of 20 galaxy clusters contains ten brightest cluster galaxies (BCGs) that exhibit significant ($>$5 $ $) extinction-corrected star formation rates (SFRs). Star formation activity is inferred from photometric estimates of UV and H$ $+[\ion{N}{2}] emission in knots and filaments detected in CLASH HST ACS and WFC3 ...
Kevin Fogarty +4 more
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Logarithmic and Strong Coupling Models in Weyl‐Type f(Q,T)$f(Q,T)$ Gravity
Annalen der Physik, Volume 538, Issue 1, January 2026.This work explores Weyl‐type f(Q,T) gravity using recent observational datasets — CC, Pantheon+, Union 3.0, and DESI DR2. Through MCMC analysis of logarithmic and strong coupling models, the study reveals a transition from deceleration to acceleration, quintessence‐to‐phantom dynamics, and late‐time consistency with LCDM, offering a geometry‐driven ...
Rahul Bhagat, S. K. Tripathy, B. Mishra
wiley +1 more source
The Astrophysical JournalWe 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 +3 more
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Witnessing the Hierarchical Assembly of the Brightest Cluster Galaxy in a Cluster at z = 1.26 [PDF]
, 2002 We have obtained a new high-resolution K′-band image of the central region of the rich X-ray cluster RX J0848.9+4452 at z = 1.26. We found that the brightest cluster galaxy (BCG) in the cluster is clearly separated into two distinct objects.
T. Yamada +7 more
semanticscholar +1 more source
Astronomische Nachrichten, Volume 347, Issue 1, January 2026.ABSTRACT Isochrones, equal‐age curves, are widely used in astrophysics to estimate stellar ages. Classical stellar parameters are, however, very limited in their usability for main sequence stars because of their weak age‐dependence. Here, rotation period measurements provide complementary information.
David Gruner, Sydney A. Barnes
wiley +1 more source
KINEMATICS OF 13 BRIGHTEST CLUSTER GALAXIES
The Astrophysical Journal, 1995 Velocity dispersion profiles and rotation curves have been determined for a sample of 13 brightest duster galaxies (BCGs) in order to study their internal stellar kinematics and investigate their relationship to ellipticals. We find that BCGs generally display velocity dispersion profiles with gradients similar to those found in normal bright ...
FISHER, D, ILLINGWORTH, G, FRANX, M
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The Astrophysical JournalThe 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 +33 more
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Astronomy & AstrophysicsWe present a physically interpretable framework to quantify dynamical disturbances in galaxy clusters using projected two-dimensional phase-space information.
Kong Chuiyang, Dell’Antonio Ian
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