On relative supernova rates and nucleosynthesis roles

Details On relative supernova rates and nucleosynthesis roles On relative supernova rates and nucleosynthesis roles

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...339l..25a&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 339, April 1, 1989, p. L25-L27. Research supported by NSF and NAS

Physics

53

Gravitational Collapse, Iron Compounds, Nuclear Fusion, Stellar Cores, Supernova 1987A, Light Curve, Stellar Magnitude, Stellar Physics

Scientific paper

It is shown that the Ni-56-Fe-56 observed in SN 1987A argues that core collapse supernovae may be responsible for more than 50 percent of the iron in the galaxy. Furthermore it is argued that the time averaged rate of thermonuclear driven Type I supernovae may be at least an order of magnitude lower than the average rate of core collapse supernovae. The present low rate of Type II supernovae (below their time averaged rate of approx. 1/10 yr) is either because the past rate was much higher because many core collapse supernovae are dim like SN 1987A. However, even in this latter case they are only an order of magnitude dimmer that normal Type II's due to the contribution of Ni-56 decay to the light curve.

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