A Multi Wavelength Survey of Early-Type Galaxies

Details A Multi Wavelength Survey of Early-Type Galaxies A Multi Wavelength Survey of Early-Type Galaxies

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21910206s&link_type=abstract

American Astronomical Society, AAS Meeting #219, #102.06

Astronomy and Astrophysics

Astronomy

Scientific paper

The emission weighted metal abundance of the hot gas in early-type galaxies are known to be surprisingly lower than the theory expectation and varies between galaxies of similar optical luminosities, which predicts some missing factor in the enrichment process. With Chandra, XMM-Newton and Suzaku, we studied more than 40 early-type galaxies with the span of X-ray luminosities up to 4 orders of magnitude. We find some correlations in relationships between LX, LK, temperature and abundance, with a large scatter and a dichotomy between X-ray faint and X-ray bright galaxies. We compared the measured abundance of X-ray faint galaxies and their neutral gas mass to examine the scenario that the measured low abundance of X-ray faint galaxies is the result of the dilution of remaining hot gas by such pristine neutral gas.

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