FUV and X-ray absorption in the Warm-Hot Intergalactic Medium

Details FUV and X-ray absorption in the Warm-Hot Intergalactic Medium FUV and X-ray absorption in the Warm-Hot Intergalactic Medium

2008-01-07

arxiv.org/abs/0801.0975v1

Astronomy and Astrophysics

Astrophysics

26 pages, 9 figures, accepted for publication in Space Science Reviews, special issue "Clusters of galaxies: beyond the therma

Scientific paper

10.1007/s11214-008-9325-4

The Warm-Hot Intergalactic Medium (WHIM) arises from shock-heated gas collapsing in large-scale filaments and probably harbours a substantial fraction of the baryons in the local Universe. Absorption-line measurements in the ultraviolet (UV) and in the X-ray band currently represent the best method to study the WHIM at low redshifts. We here describe the physical properties of the WHIM and the concepts behind WHIM absorption line measurements of H I and high ions such as O VI, O VII, and O VIII in the far-ultraviolet and X-ray band. We review results of recent WHIM absorption line studies carried out with UV and X-ray satellites such as FUSE, HST, Chandra, and XMM-Newton and discuss their implications for our knowledge of the WHIM.

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