Results 131 to 140 of about 60,555 (229)
Brightest cluster galaxies as standard candles
The Astrophysical Journal, 1995 We investigate the use of brightest cluster galaxies (BCGs) as standard candles for measuring galaxy peculiar velocities on large scales. We have obtained precise large-format CCD surface photometry and redshifts for an all-sky, volume-limited (z less than or = 0.05) sample of 199 BCG. We reinvestigate the Hoessel (1980) relationship between the metric
Marc Postman, Tod R. Lauer
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Spectroscopic and X-ray Modeling of the Strong Lensing Galaxy Cluster MACS J0138.0-2155
The Open Journal of AstrophysicsWe model the total mass and galactic substructure in the strong lensing galaxy cluster MACS J0138.0-2155 using a combination of Chandra X-ray data, Multi-Unit Spectroscopic Explorer (MUSE) spectroscopy, and Hubble Space Telescope imaging.
Abigail Flowers +4 more
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PEARLS: Globular Clusters and Ultracompact Dwarfs in the El Gordo Galaxies at z = 0.87
The Astrophysical JournalJWST/NIRCam 0.9 to 2.0 μ m images reveal a population of point sources around the major galaxies in the El Gordo cluster at redshift z = 0.87. Their distribution in the color–magnitude diagrams shows a narrow sequence well separated from field-galaxy ...
William E. Harris +13 more
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Brightest Cluster Galaxies & Cooling Flows [PDF]
Proceedings of the International Astronomical Union, 2012 AbstractIn the absence of any form of feedback heating, the gas in the central regions of massive relaxed cluster should cool and initiate a cooling flow. The presence/efficiency of an additional heating and the ultimate fate of the cooling gas is the subject of an extensive debate.
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Spectral variations in brightest cluster galaxies
The Astrophysical Journal, 1978 Multichannel-spectrometer scans of 56 of the brightest galaxies in faint clusters have been examined for evidence of color evolution. The dispersion introduced into the sample by some 25% of the galaxies which have unusual spectra is shown to be sufficient to obscure evolutionary variations.
A. Wilkinson, J. B. Oke
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The Astrophysical JournalWe use the L-GALAXIES semianalytic model to investigate the evolution of brightest cluster galaxies (BCGs) found in clusters at z ∼ 0. BCGs are typically located in the central region of galaxy clusters, near the bottom of the potential well, exposing ...
Marcelo C. Vicentin +5 more
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XRISM Reveals Low Nonthermal Pressure in the Core of the Hot, Relaxed Galaxy Cluster A2029
The Astrophysical Journal LettersWe present XRISM Resolve observations of the core of the hot, relaxed galaxy cluster Abell 2029 (A2029). We find that the line-of-sight bulk velocity of the intracluster medium (ICM) within the central 180 kpc is at rest with respect to the brightest ...
XRISM Collaboration +138 more
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Kinematics, abundances and origin of brightest cluster galaxies
Monthly Notices of the Royal Astronomical Society, 1999 21 pages, accepted for publication in ...
Carter, D, Bridges, TJ, Hau, GKT
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Weak-lensing Characterization of the Dark Matter in 29 Merging Clusters that Exhibit Radio Relics
The Astrophysical Journal Supplement SeriesWe present a multiwavelength analysis of 29 merging galaxy clusters that exhibit radio relics. For each merging system, we perform a weak-lensing analysis on Subaru optical imaging.
Kyle Finner +7 more
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Warm and Cold Molecular Gas in the Cluster Center of MACS 1931−26 with JWST and ALMA
The Astrophysical JournalWe perform one of the first spatially resolved studies of warm (>100 K) and cold (10–100 K) molecular gas in the circumgalactic medium (CGM), focusing on the brightest cluster galaxy (BCG) of a cool-core galaxy cluster, MACS 1931−26, at z = 0.35.
L. Ghodsi +11 more
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