Published in Space Science Reviews, Volume 134, Issue
1-4, pp. 51-70
For a PDF version of the article, click here.
astro-ph/0801.0977
Abstract. 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.
Key words: Galaxies: clusters X-ray: spectra
Table of Contents