SN 1991T - Gamma-Ray Observatory's first supernova?

Details SN 1991T - Gamma-Ray Observatory's first supernova? SN 1991T - Gamma-Ray Observatory's first supernova?

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...379l...7b&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 379, Sept. 20, 1991, p. L7-L11. Research supported by Margaret Cu

Astronomy and Astrophysics

Astronomy

13

Gamma Ray Astronomy, Stellar Evolution, Supernovae, Astronomical Observatories, Radioactive Decay, White Dwarf Stars

Scientific paper

Consideration is given to the explosion of the Type Ia supernova SN 1991T in the nearby galaxy NGC 4527 detected in gamma-ray lines by the recently launched GRO. The dominant gamma-line and continuum features of the new 'delayed detonation' model FDEFA1 are calculated and compared to those for standard deflagration models W7 and cdtg7. It is shown that there are many useful hard photon discriminants of the Type Ia explosion mechanism that can, in principle, be detected by the OSSE and COMPTEL instruments on the GRO. Either SN 1991T, if bright enough, or one of the several Type Ia supernovae expected to be within the GRO's range during its active life, may make it possible to settle the detonation/deflagration debate, verify the generic thermonuclear white dwarf model of Type Ia explosions, and calibrate the Type Ia B(max)/847 keV line flux ratio.

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