The mass of the missing baryons in the X-ray forest of the warm–hot intergalactic medium

Fabrizio Nicastro (), Smita Mathur, Martin Elvis, Jeremy Drake, Taotao Fang, Antonella Fruscione, Yair Krongold, Herman Marshall, Rik Williams and Andreas Zezas
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Fabrizio Nicastro: Harvard-Smithsonian Center for Astrophysics
Smita Mathur: The Ohio State University
Martin Elvis: Harvard-Smithsonian Center for Astrophysics
Jeremy Drake: Harvard-Smithsonian Center for Astrophysics
Taotao Fang: University of California-Berkeley
Antonella Fruscione: Harvard-Smithsonian Center for Astrophysics
Yair Krongold: Harvard-Smithsonian Center for Astrophysics
Herman Marshall: Massachusetts Institute of Technology
Rik Williams: The Ohio State University
Andreas Zezas: Harvard-Smithsonian Center for Astrophysics

Nature, 2005, vol. 433, issue 7025, 495-498

Abstract: On the trail of the missing baryons According to current cosmological models, baryons — elementary particles found in normal everyday matter — make up about 5% of the total mass density of the Universe. Observations at high redshifts support that prediction, but nearer home in space and time only half as many baryons have been detected. This has prompted a search for missing ‘normal’ (as opposed to ‘dark’) matter. Nicastro et al. report the discovery of a previously unknown source of baryons lying in a warm–hot phase of the intergalactic medium — and their mass is consistent with that of the ‘missing’ baryons

Date: 2005
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DOI: 10.1038/nature03245

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