Si to Fe Abundance Ratio in the Hot ISM of Early Type Galaxies

Details Si to Fe Abundance Ratio in the Hot ISM of Early Type Galaxies Si to Fe Abundance Ratio in the Hot ISM of Early Type Galaxies

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009xmm..prop...73k&link_type=abstract

XMM-Newton Proposal ID #06519102

Computer Science

Galaxies, Galactic Surveys, Ngc 4382

Scientific paper

We propose deep XMM-Newton observations of young, post-merger elliptical galaxies to determine Si to Fe abundance ratios in the hot ISM and to compare with those of typical old elliptical galaxies. Accurate measurement of Fe to alpha element abundance ratios is critical to understand the metal enrichment history from SNe Type Ia and II ejecta. Because the LX/LB ratios are low among the proposed ellipticals, measurements of individual element abundances are uncertain and often controversial. However, the Si to Fe abundance ratio can be tightly constrained by analyzing the proposed XMM-Newton data, in conjunction with available Chandra data to constrain the LMXB contribution to the XMM spectra. These results can constrain different evolutionary scenarios.

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