Publication Date:
2011-08-24
Description:
We present our analysis of ASCA PV phase observations of the elliptical galaxies NGC 1404 and NGC 4374 (M84). The average metallicities in the hot gas derived from the SIS spectra are exceptionally low, Z approximately 0.15 solar, while the temperatures are 'typical,' kT approximately 0.75 keV. We also place upper limits on intrinsic column densities. The low abundances lend support to the theory of Fe enrichment of intracluster media by protogalactic Type II supernova-driven winds and raise the possibility of a fundamental connection between baryon fraction, dissipation, and abundances in elliptical galaxies.
Keywords:
ASTROPHYSICS
Type:
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X); 436; 1; p. L75-L78
Format:
text
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