Gamma-ray lines from type IB/IC supernovae and SN 1987A

Details Gamma-ray lines from type IB/IC supernovae and SN 1987A Gamma-ray lines from type IB/IC supernovae and SN 1987A

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aipc..232..236n&link_type=abstract

IN: Gamma-ray line astrophysics; Proceedings of the International Symposium, Paris, France, Dec. 10-13, 1990 (A92-43619 18-90).

Astronomy and Astrophysics

Astrophysics

9

Gamma Ray Spectra, Line Spectra, Nuclear Astrophysics, Pulsars, Supernova 1987A, Binary Stars, Helium, Light Curve, Stellar Evolution, Stellar Mass, Stellar Models

Scientific paper

Gamma-ray lines expected from helium star models for type IB/IC supernovae (SN IB/IC) are presented. Summarized are: (1) presupernova evolution that may lead to the difference between SN IB and SN IC; (2) nucleosynthesis and isotopic abundances in the exploding helium stars with 3-8 solar masses, and their mass dependence; (3) 2D hydrodynamical simulations of Rayleigh-Taylor instabilities and mixing; (4) optical light curves of these helium stars, and the dependencies on the stellar mass and the degree of mixing; and (5) X-ray/gamma-ray spectra and gamma-ray line light curves originated from radioactive decays, their dependencies on the stellar mass and mixing. The possibilities that INTEGRAL and GRO detect gamma-ray lines and hard X-rays from nearby SNe IB/IC are discussed. Also discussed are the implications of recent change in the bolometric light curve of SN 1987A as well as the updated comparison between the calculated X/gamma-ray line light curves and observations.

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