Soft X-ray Transmission Spectroscopy of Warm/Hot Intergalactic Medium with XEUS

Details Soft X-ray Transmission Spectroscopy of Warm/Hot Intergalactic Medium with XEUS Soft X-ray Transmission Spectroscopy of Warm/Hot Intergalactic Medium with XEUS

2005-04-27

arxiv.org/abs/astro-ph/0504594v2

Astronomy and Astrophysics

Astrophysics

34 pages, 17 figures. Substantial revision. PASJ, in press (2006, vol.58, August 25 issue)

Scientific paper

We discuss the detectability of Warm/Hot Intergalactic medium (WHIM) via the absorption lines toward bright point sources with a future X-ray satellite mission, XEUS. While we consider bright QSOs as specific examples, the methodology can be applied to bright GRB afterglows. We create mock absorption spectra for bright QSOs (more than 20 QSOs over the all sky) using a light-cone output of a cosmological hydrodynamic simulation. We assume that WHIM is under collisional and photo-ionization equilibrium. If WHIM has a constant metallicity of $Z=0.1Z_\odot$, approximately 2 O{\sc vii} absorption line system with $>3\sigma$ will be detected on average along a random line-of-sight toward bright QSOs up to $z=0.3$ for 30 ksec exposure.

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