Abstract
view Abstract Citations (50) References (33) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Heavy Element Abundance in the Hot Corona of the Bright Elliptical Galaxy NGC 4472 Forman, W. ; Jones, C. ; David, L. ; Franx, M. ; Makishima, K. ; Ohashi, T. Abstract From a 25 ks ROSAT PSPC observation of the elliptical galaxy NGC 4472, we measured the iron abundance with arcminute spatial resolution to a radial distance of 16' (74 kpc) in the hot corona. The heavy element abundance is roughly constant at approximately 1-2 [Fe/H]_sun_ from 4' to 16'. A comparison of these measurements to models of the heavy element enrichment of hot galactic coronae around elliptical galaxies provides new insights and constraints for the evolution with time of the Type Ia supernova rate and for its present epoch value. In particular, the near-solar value of the iron abundance and its constancy throughout the corona suggest a relatively constant supernova rate over time with a present epoch value at the low end of the range derived by van den Bergh & Tammann. Publication: The Astrophysical Journal Pub Date: December 1993 DOI: 10.1086/187115 Bibcode: 1993ApJ...418L..55F Keywords: GALAXIES: ABUNDANCES; GALAXIES: ISM; GALAXIES: INDIVIDUAL NGC NUMBER: NGC 4472; X-RAYS: GALAXIES full text sources ADS | data products SIMBAD (4) NED (1) HEASARC (1)
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