X-Ray Clusters of Galaxies: What to Plot Against X-Ray Luminosities?
نویسندگان
چکیده
منابع مشابه
X-ray observations of Clusters of Galaxies
In the standard CDM (Cold Dark Matter) cosmological scenario, initial density fluctuations, generated in the early Universe, grow under the influence of gravity. The Universe gets more and more structured with time. At large scale, the matter density distribution exhibits a web-like topology with expanding voids surrounded by contracting sheets and filaments. Massive clusters of galaxies, locat...
متن کاملX{ray emission from Clusters of Galaxies
In the last eight years, the Chandra and XMM–Newton satellites changed significantly our view of X–ray clusters of galaxies. In particular, several complex phenomena have been directly observed: interactions between cluster galaxies and the Intra Cluster Medium (ICM), cold fronts in the ICM, hot bubbles due to relativistic jets from radio loud AGN, the lack of cold gas in “cool–cores”, and non–...
متن کاملX-ray Selected Clusters of Galaxies
Three topics will be presented in this paper: 1) study of the clusters and groups of galaxies found serendipitously in the North Ecliptic Pole (NEP) region of the ROSAT all-sky survey; 2) the highest redshift clusters found in the EMSS and the cosmological implications of their very existence; 3) the gravitational lensing in the EMSS X-ray selected clusters of galaxies observed by the Hubble Sp...
متن کاملX-ray emission from clusters of galaxies
Clusters of galaxies are gravitationally bound configurations containing typically hundreds of galaxies in a region about 10 cm in size. They range from irregular clusters, with strong subclustering, no strong central concentration, and mainly spiral galaxies, to regular clusters, with smooth and centrally condensed galaxy distributions containing few spiral galaxies. Observations of these clus...
متن کاملClusters of Galaxies: An X-ray Perspective
There has been extensive recent progress in X-ray observations of clusters of galaxies with the analysis of the entire ASCA database and recent new results from Beppo-SAX, Chandra, and XMM-Newton. The temperature profiles of most clusters are isothermal from 0.05– 0.6 Rviral, contrary to theoretical expectations and early results from ASCA. Similarly, the abundance profiles of Fe are roughly co...
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ژورنال
عنوان ژورنال: Highlights of Astronomy
سال: 1977
ISSN: 1539-2996
DOI: 10.1017/s1539299600002707