Structures and number-density distributions in clusters of galaxies
نویسندگان
چکیده
منابع مشابه
On the Number Density of Sunyaev-Zeldovich Clusters of Galaxies.
If the mean properties of clusters of galaxies are well described by the entropy-driven model, the distortion induced by the cluster population on the blackbody spectrum of the cosmic microwave background radiation is proportional to the total amount of intracluster gas, while temperature anisotropies are dominated by the contribution of 1014 M middle dot in circle clusters. This result depends...
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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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Using radio data at 1.4 GHz from the ATCA we identify five head-tail (HT) galaxies in the central region of the Horologium-Reticulum Supercluster (HRS). Physical parameters of the HT galaxies were determined along with substructure in the HRS to probe the relationship between environment and radio properties. Using a density enhancement technique applied to 582 spectroscopic measurements in the...
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We investigate structural properties of old, metal-poor globular clusters (GCs) formed at high redshifts (z > 6) and located inside and outside virialized galaxy-scale halos in clusters of galaxies with the total masses ofMCL based on high-resolution cosmological simulations with models of GC formation. We mainly derive the parameter dependences of physical properties of intracluster GCs (ICGCs...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1978
ISSN: 0074-1809
DOI: 10.1017/s0074180900144547