X-ray emission of galaxies with emission lines
نویسندگان
چکیده
منابع مشابه
Emission Lines in X-ray Spectra of Clusters of Galaxies
Emission lines in X–ray spectra of clusters of galaxies reveal the presence of heavy elements in the diffuse hot plasma (the Intra Cluster Medium, or ICM) in virial equilibrium in the dark matter potential well. The relatively simple physical state of the ICM allows us to estimate, with good accuracy, its thermodynamical properties and chemical abundances. These measures put strong constraints ...
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 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 کاملX-ray Emission from Clusters of Galaxies
We present a summary of X-ray spectral observations of 30 clusters of galaxies from HEAO-1. There exists strong correlations between X-ray luminosity, Lx , and temperature kT in the form L xaT2 ' 3 . This result combined with the Lx vs central galaxy density relation and the virial theorem indicates that the core radius of the gas should be roughly independent of Lx or KT and that more luminous...
متن کاملEmission Mechanisms in X-Ray Faint Galaxies
Hot gas dominates the emission in X-ray luminous early-type galaxies, but in relatively X-ray faint systems, integrated X-ray emission from discrete stellar-like sources is thought to be considerable, although the amount of the contribution is controversial. To help resolve this issue, we examine the radial X-ray surface brightness distribution of 17 X-ray faint galaxies observed with the ROSAT...
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ژورنال
عنوان ژورنال: Astronomical School’s Report
سال: 2011
ISSN: 2411-6602,1607-2855
DOI: 10.18372/2411-6602.07.1114