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Clusters of Galaxies: Beyond the Thermal View

E-BookPDF1 - PDF WatermarkE-Book
418 Seiten
Englisch
Springer New Yorkerschienen am01.05.20082008
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).

sronl.nl.-kaastra/ 
Jelle Kaastra studied astrophysics at Utrecht University. He obtained his Ph.D. in astronomy in 1985 with a thesis on Solar flares. After that he joined the Netherlands Institute for Space Research SRON, first in Leiden, and from 1994 in Utrecht, where he currently is employed as a senior scientist. He is an expert on high-resolution X-ray spectroscopy and currently works on a variety of topics in this field, including clusters of galaxies.
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Produkt

KlappentextThe 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).

sronl.nl.-kaastra/ 
Jelle Kaastra studied astrophysics at Utrecht University. He obtained his Ph.D. in astronomy in 1985 with a thesis on Solar flares. After that he joined the Netherlands Institute for Space Research SRON, first in Leiden, and from 1994 in Utrecht, where he currently is employed as a senior scientist. He is an expert on high-resolution X-ray spectroscopy and currently works on a variety of topics in this field, including clusters of galaxies.
Details
Weitere ISBN/GTIN9780387788753
ProduktartE-Book
EinbandartE-Book
FormatPDF
Format Hinweis1 - PDF Watermark
FormatE107
Erscheinungsjahr2008
Erscheinungsdatum01.05.2008
Auflage2008
Seiten418 Seiten
SpracheEnglisch
IllustrationenIV, 418 p.
Artikel-Nr.1424311
Rubriken
Genre9200

Inhalt/Kritik

Inhaltsverzeichnis
Clusters of Galaxies: Beyond the Thermal View.- Clusters of Galaxies: Setting the Stage.- FUV and X-Ray Absorption in the Warm-Hot Intergalactic Medium.- Soft X-Ray and Extreme Ultraviolet Excess Emission from Clusters of Galaxies.- Nonthermal Phenomena in Clusters of Galaxies.- Observations of Extended Radio Emission in Clusters.- Cosmological Shock Waves.- Equilibration Processes in the Warm-Hot Intergalactic Medium.- Thermal Radiation Processes.- Nonthermal Radiation Mechanisms.- Particle Acceleration Mechanisms.- Simulation Techniques for Cosmological Simulations.- Thermodynamical Properties of the ICM from Hydrodynamical Simulations.- Numerical Simulations of the Warm-Hot Intergalactic Medium.- Non-Thermal Processes in Cosmological Simulations.- Observations of Metals in the Intra-Cluster Medium.- Metal Enrichment Processes.- The Chemical Enrichment of the ICM from Hydrodynamical Simulations.- Future Instrumentation for the Study of the Warm-Hot Intergalactic Medium.mehr

Autor

sronl.nl.~kaastra/
Jelle Kaastra studied astrophysics at Utrecht University. He obtained his Ph.D. in astronomy in 1985 with a thesis on Solar flares. After that he joined the Netherlands Institute for Space Research SRON, first in Leiden, and from 1994 in Utrecht, where he currently is employed as a senior scientist. He is an expert on high-resolution X-ray spectroscopy and currently works on a variety of topics in this field, including clusters of galaxies.