Late emission from supernovae - A window on stellar nucleosynthesis

Details Late emission from supernovae - A window on stellar nucleosynthesis Late emission from supernovae - A window on stellar nucleosynthesis

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...343..323f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 343, Aug. 1, 1989, p. 323-342.

Astronomy and Astrophysics

Astrophysics

95

Cobalt Isotopes, Emission Spectra, Nuclear Astrophysics, Radioactive Decay, Supernovae, Line Spectra, Monte Carlo Method, Stellar Interiors

Scientific paper

Monte Carlo techniques are used to study the energy deposition of gamma rays from the radioactive decay of Co-56 in Type Ib and Type II SN. It is found that above an electron fraction of about 0.1, direct excitations are negligible, and the line emission arises from thermal processes. The results indicate that the emission is dominated by neutral and singly ionized lines, including forbiden O I, forbidden Ca II, forbidden C I, and forbidden Si I. The late spectrum is shown to be useful as a diagnostic of the nucleosynthetic structure of the ejecta. The present model has been applied to observations of the Type Ib SN 1985F, and it is suggested that Type Ib SN come from stars of greater than 25 solar masses.

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