Soft X-ray and extreme ultraviolet excess emission from clusters of galaxies

Details Soft X-ray and extreme ultraviolet excess emission from clusters of galaxies Soft X-ray and extreme ultraviolet excess emission from clusters of galaxies

2008-01-07

arxiv.org/abs/0801.0977v1

Astronomy and Astrophysics

Astrophysics

21 pages, 5 figures, accepted for publication in Space Science Reviews, special issue "Clusters of galaxies: beyond the therma

Scientific paper

10.1007/s11214-008-9313-8

An excess over the extrapolation to the extreme ultraviolet and soft X-ray ranges of the thermal emission from the hot intracluster medium has been detected in a number of clusters of galaxies. We briefly present each of the satellites (EUVE, ROSAT PSPC and BeppoSAX, and presently XMM-Newton, Chandra and Suzaku) and their corresponding instrumental issues, which are responsible for the fact that this soft excess remains controversial in a number of cases. We then review the evidence for this soft X-ray excess and discuss the possible mechanisms (thermal and non-thermal) which could be responsible for this emission.

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