HEAO-3 LIMITS ON THE TI-44 YIELD IN GALACTIC SUPERNOVAE

被引：20

作者：

MAHONEY, WA ^{[1
]}

LING, JC ^{[1
]}

WHEATON, WA ^{[1
]}

HIGDON, JC ^{[1
]}

机构：

[1] CLAREMONT COLL,JOINT SCI DEPT,CLAREMONT,CA 91711

来源：

ASTROPHYSICAL JOURNAL | 1992年 / 387卷 / 01期

关键词：

GAMMA-RAYS OBSERVATIONS; NUCLEAR REACTIONS; NUCLEOSYNTHESIS; ABUNDANCES; STARS ABUNDANCES; STARS SUPERNOVAE;

D O I：

10.1086/171083

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Data from 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(-5) photons cm-2 s-1. 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.

引用

页码：314 / 319

页数：6

共 48 条

[1] HALF-LIVES OF TI-44 AND BI-207 [J].