Intergalactic Gas in Groups of Galaxies
Title | Intergalactic Gas in Groups of Galaxies PDF eBook |
Author | Emily Elizabeth Freeland |
Publisher | |
Pages | 87 |
Release | 2009 |
Genre | |
ISBN |
Clusters of Galaxies: Beyond the Thermal View
Title | Clusters of Galaxies: Beyond the Thermal View PDF eBook |
Author | Jelle Kaastra |
Publisher | Springer Science & Business Media |
Pages | 418 |
Release | 2008-05-01 |
Genre | Science |
ISBN | 0387788751 |
The existence of soft excess emission originating from clusters of galaxies, de ned as em- sion detected below 1 keV in excess over the usual thermal emission from hot intracluster gas (hereafter the ICM) has been claimed since 1996. Soft excesses are particularly - portant to detect because they may (at least partly) be due to thermal emission from the Warm-Hot Intergalactic Medium, where as much as half of the baryons of the Universe could be. They are therefore of fundamental cosmological importance. Soft excess emission has been observed (and has also given rise to controversy) in a number of clusters, mainly raising the following questions: (1) Do clusters really show a soft excess? (2) If so, from what spatial region(s) of the cluster does the soft excess or- inate? (3) Is this excess emission thermal, originating from warm-hot intergalactic gas (at 6 temperatures of?10 K), or non-thermal, in which case several emission mechanisms have been proposed. Interestingly, some of the non-thermal mechanisms suggested to account for soft excess emission can also explain the hard X-ray emission detected in some clusters, for example by RXTE and BeppoSAX (also see Petrosian et al. 2008—Chap. 10, this issue; Rephaeli et al. 2008—Chap. 5, this issue).
Motion of a Galaxy Through the Viscous Intergalactic Gas in Clusters of Galaxies
Title | Motion of a Galaxy Through the Viscous Intergalactic Gas in Clusters of Galaxies PDF eBook |
Author | Alexander Kashlinsky |
Publisher | |
Pages | 56 |
Release | 1979 |
Genre | Galaxies |
ISBN |
Photoionization of Intergalactic Gas and Cooling Flows in Clusters of Galaxies
Title | Photoionization of Intergalactic Gas and Cooling Flows in Clusters of Galaxies PDF eBook |
Author | Megan E. Donahue |
Publisher | |
Pages | 352 |
Release | 1990 |
Genre | Galaxies |
ISBN |
The Interaction of Gas and Galaxies Within Galaxy Clusters
Title | The Interaction of Gas and Galaxies Within Galaxy Clusters PDF eBook |
Author | Jill Cornell Tarter |
Publisher | |
Pages | 576 |
Release | 1975 |
Genre | Galaxies |
ISBN |
Galaxy Groups
Title | Galaxy Groups PDF eBook |
Author | Stephen Ewing Schneider |
Publisher | |
Pages | 234 |
Release | 1985 |
Genre | Galaxies |
ISBN |
Gas Flow in Galaxies and Clusters
Title | Gas Flow in Galaxies and Clusters PDF eBook |
Author | James Christopher Baker |
Publisher | |
Pages | 462 |
Release | 1973 |
Genre | Galaxies |
ISBN |