X-raying the Star Formation History of the Universe

Abstract

The current models of early star and galaxy formation are based upon the hierarchical growth of dark matter halos, within which the baryons condense into stars after cooling down from a hot diffuse phase. The latter is replenished by infall of outer gas into the halo potential wells; this includes a fraction previously expelled and preheated, due to momentum and energy fed back by the SNe which follow the star formation. We identify such an implied hot phase with the medium known to radiate powerful X-rays in clusters and in groups of galaxies. We show that the amount of the hot component required by the current star formation models is enough to be observable out to redshifts $z\approx 1.5$ in forthcoming deep surveys from {\it Chandra} and {\it XMM}, especially in case the star formation rate is high at such and earlier $z$. These X-ray emissions constitute a necessary counterpart, and will provide a much wanted probe of the SF process itself (in particular, of the SN feedback), to parallel and complement the currently debated data from optical and IR observations of the young stars.

13 pages, 2 figures, accepted for publicatin in ApJL

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Cited by in corpus (15)

• Iron Gradients in Cooling Flow Galaxies and Groups
• The Impact of Galaxy Formation on the X-ray Evolution of Clusters
• The X-Ray Derived Cosmological Star Formation History and the Galaxy X-Ray Luminosity Functions in the Chandra Deep Fields North and South
• The Formation of the First Massive Black Holes
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• The Chandra Deep Field North Survey. IX. Extended X-ray Sources
• Entropy Evolution in Galaxy Groups and Clusters; A Comparison of External and Internal Heating
• Herschel/HerMES: The X-ray - Infrared correlation for star-forming galaxies at z~1
• Sunyaev-Zeldovich Effect from Quasar-driven Blast-waves
• Heating of the Hot Intergalactic Medium by Powerful Radio Galaxies and Associated High Energy Gamma-Ray Emission
• X-ray properties of Lyman Break Galaxies in the Hubble Deep Field North region
• The Formation and Evolution of the First Massive Black Holes
• Probing the warm Inter-Galactic Medium through absorption against Gamma Ray Bursts X-ray afterglows
• The SZ Effect as a Probe of Non-Gravitational Entropy in Groups and Clusters of Galaxies
• Cosmic star formation history associated with QSO activity: an approach using the black hole to bulge mass correlation