Velocity distributions in clusters of galaxies
نویسندگان
چکیده
منابع مشابه
Internal Velocity and Mass Distributions in Clusters of Galaxies for a Variety of Cosmogonic Models
The mass and velocity distributions in the outskirts (0.5 − 3.0hMpc) of clusters of galaxies are examined for a suite of cosmogonic models utilizing largescale Particle-Mesh (PM) simulations (500 cells, 250 particles and box size of 100hMpc, giving a nominal resolution of 0.2hMpc with the true resolution about 0.5hMpc). Through a series of model computations, designed to isolate the different e...
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Context. Some previous investigations have found that the fraction (fAGN ) of active galactic nuclei (AGNs) is lower in clusters than in the field. This can result from the suppression of galaxy-galaxy mergers in high-velocity dispersion (σv) clusters, if the formation and/or fueling of AGNs is directly related to the merging process. Aims. We investigate the existence of a relation between fAG...
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This Letter presents the color distributions of the globular cluster (GC) systems of 12 Virgo elliptical galaxies, measured using data from the Hubble Space Telescope. Bright galaxies with large numbers of detected GC’s show two distinct cluster populations with mean V − I colors near 1.01 and 1.26. The GC population of M86 is a clear exception; its color distribution shows a single sharp peak ...
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Context. Thermal X-ray spectra of clusters of galaxies and other sources are commonly calculated assuming Maxwellian electron distributions. There are situations where this approximation is not valid, for instance near interfaces of hot and cold gas and near shocks. Aims. The presence of non-thermal electrons affects the X-ray spectrum. To study the role of these electrons in clusters and other...
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The shape of the line-of-sight velocity distribution (LOSVD) is measured for a sample of 14 elliptical galaxies, predominantly low-luminosity ellipticals. The sample is dominated by galaxies in the Virgo cluster but also contains ellipticals in nearby groups and low density environments. The parameterization of the LOSVD due to Gerhard and van der Marel & Franx is adopted, which measures the as...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2006
ISSN: 0035-8711,1365-2966
DOI: 10.1111/j.1365-2966.2006.10421.x