Missing Baryons and the Warm-Hot Intergalactic Medium

Abstract

Stars and gas in galaxies, hot intracluster medium, and intergalactic photo-ionized gas make up at most half of the baryons that are expected to be present in the universe. The majority of baryons are still missing and are expected to be hidden in a web of warm-hot intergalactic medium. This matter was shock-heated during the collapse of density perturbations that led to the formation of the relaxed structures that we see today. Finding the missing baryons and thereby producing a complete inventory of possibly the only detectable component of the energy-mass budget of the universe is crucial to validate or invalidate our standard cosmological model.

14 pages, accepted for publication in Science (to appear as a Perspective Article in a Januray 2008 special issue of Science)

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Cited by in corpus (49)

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• Probing the missing baryons with the Sunyaev-Zel'dovich effect from filaments
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• The Commensal Real-time ASKAP Fast Transients (CRAFT) survey
• Mapping the Dark Side with DEIMOS: Globular Clusters, X-ray Gas, and Dark Matter in the NGC 1407 Group
• The Heidelberg compact electron beam ion traps
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• Thermal instabilities in cooling galactic coronae: fuelling star formation in galactic discs
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• Missing baryons traced by the galaxy luminosity density in the large-scale WHIM filaments
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• Gravitational Instability of Exotic Compact Objects
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• Applied Nanofabrication for X-ray Grating Spectroscopy