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A multi-instrument comparison of the hot ISM in elliptical galaxies

Published online by Cambridge University Press:  21 October 2010

Joel N. Bregman
Joel N. Bregman*
Affiliation:
Department of Astronomy, University of Michigan, Ann Arbor, Michigan, USA email: jbregman@umich.edu
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Abstract

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Consistent metallicities are now obtained in X-ray bright galaxies, using the Chandra ACIS and XMM PN, MOS and RGS detectors. With two temperature models, the Fe metallicity of the gas is typically solar, similar to Mg, Si, and S, but the O abundance is about half solar. These values are in conflict with models, which predict a metallicity 3-5 times higher and a Fe to O ratio near unity. This suggests that a significant fraction of metals are not becoming mixed into the hot galactic atmosphere.

Keywords

X-rays: galaxiesgalaxies: ISM
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Highlights H15: Highlights of Astronomy , November 2009 , pp. 280
Copyright
Copyright © International Astronomical Union 2010