Supernovae Types Ia/II and Intracluster Medium Enrichment

Details Supernovae Types Ia/II and Intracluster Medium Enrichment Supernovae Types Ia/II and Intracluster Medium Enrichment

1997-06-15

arxiv.org/abs/astro-ph/9706138v1

Astronomy and Astrophysics

Astrophysics

6 pages (incl 1 PostScript figure), LaTeX, also available at http://msowww.anu.edu.au/~gibson/publications.html, MNRAS, in pre

Scientific paper

We re-examine the respective roles played by supernovae (SNe) Types Ia and II in enriching the intracluster medium (ICM) of galaxy clusters, in light of the recent downward shift of the ASCA abundance ratios of alpha-elements to iron favoured by Ishimaru & Arimoto (1997, PASJ, 49, 1). Because of this shift, Ishimaru & Arimoto conclude that >50% of the ICM iron must have originated from within Type Ia SNe progenitors. A point not appreciated in their study, nor in most previous analyses, is the crucial dependence of such a conclusion upon the adopted massive star physics. Employing several alternative Type II SN yield compilations, we demonstrate how uncertainties in the treatment of convection and mass-loss can radically alter our perception of the relative importance of Type Ia and II SNe as ICM polluters. If mass-loss of the form favoured by Maeder (1992, A&A, 264, 105) or convection of the form favoured by Arnett (1996, Supernovae and Nucleosynthesis) is assumed, the effect upon the oxygen yields would lead us to conclude that Type Ia SNe play no part in polluting the ICM, in contradiction with Ishimaru & Arimoto. Apparent dichotomies still exist (e.g. the mean ICM neon-to-iron ratio implies a 100% Type II Fe origin, while the mean sulphur ratio indicates a 100% Type Ia origin) that cannot be reconciled with the currently available yield tables.

Affiliated with

Also associated with

No associations

Rating

Supernovae Types Ia/II and Intracluster Medium Enrichment does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Supernovae Types Ia/II and Intracluster Medium Enrichment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Supernovae Types Ia/II and Intracluster Medium Enrichment will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-635793