HEAO 3 limits on the Ti-44 yield in Galactic supernovae

Details HEAO 3 limits on the Ti-44 yield in Galactic supernovae HEAO 3 limits on the Ti-44 yield in Galactic supernovae

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...387..314m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 387, March 1, 1992, p. 314-319.

Statistics

Computation

19

Heao 3, Nuclear Astrophysics, Supernovae, Titanium, Abundance, Computational Astrophysics, Gamma Ray Astronomy, Monte Carlo Method, Stellar Models

Scientific paper

Data fron the high-resolution gamma-ray spectroscopy experiment on HEAO 3 have been searched for line emission from the decay of Ti-44 created in recent, as yet unobserved, Galactic supernova explosions, where the ages and locations are unknown. Because the 78 yr mean life of Ti-44 is comparable to the average time between Galactic supernovae, the gamma-ray line emission from its decay should appear as Galactic point sources. No evidence was found for such emission from a point source anywhere in the Galactic plane, with a 1-sigma limit of 8.3 x 10 exp -5 photons/sq cm per sec. Detailed models were developed to simulate the Galactic gamma-ray emission from the decay of Ti-44 produced in both type I and type II supernovae. These models were used with the measured gamma-ray line limits to constrain the supernova yields and recurrence periods.

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