X-ray Emission from the Warm-Hot Intergalactic Medium

Details X-ray Emission from the Warm-Hot Intergalactic Medium X-ray Emission from the Warm-Hot Intergalactic Medium

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jkas...37..375k&link_type=abstract

Journal of the Korean Astronomical Society, vol. 37, no. 5, pp. 375-379

Astronomy and Astrophysics

Astronomy

2

Clusters Of Galaxies, X-Rays

Scientific paper

In this paper I give an overview of the detection of emission from the warm-hot intergalactic medium (WHIM) in the outer parts of clusters of galaxies. The evidence for the presence of soft excess X-ray emission in 7 out of 21 clusters is summarized, and it is demonstrated that several of these clusters show the signatures of thermal emission in the outer parts. A strong signature is the presence of redshifted O VII emission at 0.57 keV. In the central parts, several clusters show also a soft excess, but in this case the observations cannot well discriminate between a thermal or non-thermal origin of the soft X-ray excess.

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