The Metallicity of Hot Gas in X-ray Faint Galaxies

Details The Metallicity of Hot Gas in X-ray Faint Galaxies The Metallicity of Hot Gas in X-ray Faint Galaxies

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006xmm..prop...16i&link_type=abstract

XMM-Newton Proposal ID #05006601

Other

Galaxies, Galactic Surveys, Ngc1380, Xmm-Newton Proposal 05006601

Scientific paper

The metallicity of the hot interstellar medium (ISM) of early-type galaxies has been vigorously debated over the years, but recent studies by XMM-Newton and Chandra seem to be converging on a metallicity value consistent with solar, at least for X-ray bright ellipticals. However, our analysis of a lower-temperature, X-ray faint elliptical finds that the metallicity of the gas is substantially sub-solar, challenging our notions of the origins of the hot gas. We propose moderate length observations of two other nearby X-ray faint galaxies (NGC 1380 and NGC 4382) with a lower-temperature (~0.3-0.4 keV) ISM to confirm this result.

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