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Paper: Intergalactic Matter around Isolated Galaxies
Volume: 421, Galaxies in Isolation: Exploring Nature Versus Nurture
Page: 61
Authors: Soltan, A. M.
Abstract: Gravitational potential of individual galaxies generates inflow of primordial intergalactic matter. Due to the interaction of the in-falling gas with galactic wind, galaxies are surrounded with halos of moderately hot and dense plasma known as Warm-Hot Intergalactic Medium (WHIM). Hydrodynamic simulations indicate that the WHIM halos emit soft X-rays. In the present work, the diffuse X-ray emission in the vicinity of isolated galaxies is investigated using a large sample of the Chandra X-ray Observatory exposures. High angular resolution of the Chandra telescope allows us to separate the genuine diffuse WHIM emission from the X-ray flux produced by sources within galaxies, as well as to examine the WHIM cosmic evolution up to redshift ∼ 0.3.
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