Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 360, Issue 3, Pages 1110-1122Publisher
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-2966.2005.09097.x
Keywords
intergalactic medium; quasars : absorption lines; cosmology : theory; largescale structure of Universe
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We present a simple method for tracing the spatial distribution and predicting the physical properties of the Warm-Hot Intergalactic Medium ( WHIM), from the map of galaxy light in the Local Universe. Under the assumption that biasing is local and monotonic we map the similar to 2 h(-1) Mpc smoothed density field of galaxy light into the mass-density field, from which we infer the spatial distribution of the WHIM in the Local Supercluster. Taking into account the scatter in the WHIM density-temperature and density-metallicity relation, extracted from the z = 0 outputs of high-resolution and large-box-size hydrodynamical cosmological simulations, we are able to quantify the probability of detecting WHIM signatures in the form of absorption features in the X-ray spectra, along arbitrary directions in the sky. To illustrate the usefulness of this semi-analytical method we focus on the WHIM properties in the Virgo cluster region.
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