2004/01/12 by L. Zappacosta, R. Maiolino, Zappacosta, L. +10
Engineering · Physics and Astronomy · #Adaptive optics and wavefront sensing #Astronomical Observations and Instrumentation #Astrophysics (astro-ph) #FOS: Physical sciences #Superconducting and THz Device Technology #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0401202
6 pages, 4 figures, to be published in proceedings of the workshop "Modelling the Intergalactic and Intracluster Media", Vulcano Island (Messina), Italy, October 1-4 2003
arxiv created 2004/01/12 · openalex publication_date 2004/01/12 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Several popular cosmological models predict that most of the baryonic mass in the local universe is located in filamentary and sheet-like structures associated with groups and clusters of galaxies. This gas is expected to be gravitationally heated to ~106 K and therefore emitting in the soft X-rays. We have investigated three fields with large scale structures of galaxies at redshifts 0.1, 0.45, 0.79 and found signatures of warm-hot thermal emission (kT< 1 keV) correlated with the distribution of galaxies for the first two. The correlation and the properties of both X-ray and galaxy distribution strongly suggest that the diffuse X-ray flux is due to extragalactic emission by the Warm-Hot Intergalactic Medium (WHIM) predicted by cosmological models.