Lost Baryons at Low Redshift

Details Lost Baryons at Low Redshift Lost Baryons at Low Redshift

2007-08-13

arxiv.org/abs/0708.1761v1

Astronomy and Astrophysics

Astrophysics

To appear in the proceedings of IAU 244 "Dark Galaxies and Lost Baryons", J. Davis and M. Disney, Eds

Scientific paper

10.1017/S1743921307013816

We review our attempts to discover lost baryons at low redshift with ``X-ray forest'' of absorption lines from the warm-hot intergalactic medium. We discuss the best evidence to date along the Mrk 421 sightline. We then discuss the missing baryons in the Local Group and the significance of the z=0 absorption systems in X-ray spectra. We argue that the debate over the Galactic vs. extragalactic origin of the z=0 systems is premature as these systems likely contain both components. Observations with next generation X-ray missions such as Constellation-X and XEUS will be crucial to map out the warm-hot intergalactic medium.

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