Gamma-producing radioactivities from supernovae

Details Gamma-producing radioactivities from supernovae Gamma-producing radioactivities from supernovae

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aipc..170...98w&link_type=abstract

AIP Conference Proceedings, Volume 170, pp. 98-109 (1988).

Astronomy and Astrophysics

Astronomy

26

Supernovae, Stellar Structure, Interiors, Evolution, Nucleosynthesis, Ages

Scientific paper

The production of three isotopes critical to astronomical γ-ray spectroscopy, 44Ti, 56Co, and 57Co, is briefly reviewed along with the information each contains. Emphasis is placed on SN 1987A, the only Type II supernova likely to be seen in γ-lines for decases to come. The 847 keV line from 56Co decay in this supernova should peak approximately 400 days after its explosion with a flux of about 1×10-3 cm-2 s-1. For comparison, the second best candidate, a Type Ia in the Virgo cluster (20 Mpc) gives a peak flux 100 times smaller than this 100 days after the explosion. 57Co decay in SN 1987A will also present a potentially detectable signal ~1×10-4 cm-2 s-1 in 1989 through 1991. 44Ti, chiefly from Type I supernovae, is a wild card, but may be responsible for the diffuse pair background.

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