XMM-Newton Discovery of O VII Emission from Warm Gas in Clusters of Galaxies [chapter]

Jelle S. Kaastra, R. Lieu, T. Tamura, F. B. S. Paerels, J. W. A. den Herder
2004 Astrophysics and Space Science Library  
XMM-Newton recently discovered O VII line emission from ~2 million K gas near the outer parts of several clusters of galaxies. This emission is attributed to the Warm-Hot Intergalactic Medium. The original sample of clusters studied for this purpose has been extended and two more clusters with a soft X-ray excess have been found. We discuss the physical properties of the warm gas, in particular the density, spatial extent, abundances and temperature.
doi:10.1007/978-1-4020-2564-8_5 fatcat:hy6b3tmugrelhmkk3wulhr3j5a