Hostname: page-component-78c5997874-4rdpn Total loading time: 0 Render date: 2024-11-10T14:50:17.897Z Has data issue: false hasContentIssue false
  • English
  • Français

Lost Baryons at Low Redshift

Published online by Cambridge University Press:  01 June 2007

Smita Mathur ,
Fabrizio Nicastro  and
Rik Willimas
Smita Mathur
Affiliation:
Astronomy Department, The Ohio State University, Columbus, OH 43210 email: smita@astronomy.ohio-state.edu
Fabrizio Nicastro
Affiliation:
OAR-INAF, Rome, Italy
Rik Willimas
Affiliation:
Leiden University, Netherlands
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We review our attempts to discover lost baryons at low redshift with the “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.

Keywords

atomic processesGalaxy: formationintergalactic mediumquasars: absorption linesLocal Groupcosmology: observationsX-rays: galaxies
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S244: Dark Galaxies and Lost Baryons , June 2007 , pp. 35 - 43
Copyright
Copyright © International Astronomical Union 2008

References

Bennett, C. L., et al. 2003, ApJS 148, 1Google Scholar
Burles, S. & Tytler, D. 1998, Space Science Reviews 84, 65Google Scholar
Cen, R. & Ostriker, J. 1999, ApJ 514, 1Google Scholar
Cen, R. & Fang, T. 2006, ApJ 650, 573Google Scholar
Chen, X., Weinberg, D., Katz, N. & Dave, R. 2003, ApJ 594, 42Google Scholar
Fang, T., Bryan, G.L. & Canizares, C. 2002, ApJ 564, 604Google Scholar
Fukugita, M., Hogan, C. & Peebles, P. J. E. 1998, ApJ 503, 518Google Scholar
Kravtsov, A., Klypin, A. & Hoffman, Y. 2002 ApJ 571, 563Google Scholar
Mathur, S., Weinberg, D. & Chen, X. 2003, ApJ 582, 82Google Scholar
Mathur, S., Williams, R. & Nicastro, F. 2007, in preparationGoogle Scholar
Nicastro, F., et al. 2002 ApJ 573, 157Google Scholar
Nicastro, F., et al. 2005a Nature 433, 495Google Scholar
Nicastro, F., et al. 2005b ApJ 629, 700Google Scholar
Williams, R. J., et al. , 2005 ApJ 631, 856Google Scholar
Williams, R. J., Mathur, S. & Nicastro, F. 2006a ApJL 642, 95Google Scholar
Williams, R. J., Mathur, S. & Nicastro, F. 2006 b ApJ 645, 179Google Scholar
Williams, R. J., et al. , 2007 ApJ in press.Google Scholar