Lost Baryons at Low Redshift
Astrophysics
2009-11-13 v1
Abstract
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.
Cite
@article{arxiv.0708.1761,
title = {Lost Baryons at Low Redshift},
author = {Smita Mathur and Fabrizio Nicastro and Rik J. Williams},
journal= {arXiv preprint arXiv:0708.1761},
year = {2009}
}
Comments
To appear in the proceedings of IAU 244 "Dark Galaxies and Lost Baryons", J. Davis and M. Disney, Eds