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Tracing the warm–hot intergalactic medium in the local Universe
Article first published online: 26 MAY 2005
DOI: 10.1111/j.1365-2966.2005.09097.x
Issue
Monthly Notices of the Royal Astronomical Society
Volume 360, Issue 3, pages 1110–1122, July 2005
Additional Information
How to Cite
Viel, M., Branchini, E., Cen, R., Ostriker, J. P., Matarrese, S., Mazzotta, P. and Tully, B. (2005), Tracing the warm–hot intergalactic medium in the local Universe. Monthly Notices of the Royal Astronomical Society, 360: 1110–1122. doi: 10.1111/j.1365-2966.2005.09097.x
Publication History
- Issue published online: 26 MAY 2005
- Article first published online: 26 MAY 2005
- Accepted 2005 April 10. Received 2005 April 10; in original form 2004 December 21
- Abstract
- Article
- References
- Cited By
Keywords:
- intergalactic medium;
- quasars: absorption lines;
- cosmology: theory;
- large-scale structure of Universe
ABSTRACT
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 ∼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.