THE COSMIC GAMMA-RAY BACKGROUND FROM TYPE IA SUPERNOVAE

被引：38

作者：

THE, LS

LEISING, MD

CLAYTON, DD

机构：

[1] Department of Physics, Clemson University, Clemson

来源：

ASTROPHYSICAL JOURNAL | 1993年 / 403卷 / 01期

关键词：

COSMOLOGY; THEORY; DIFFUSE RADIATION; GAMMA-RAYS; NUCLEAR REACTIONS; NUCLEOSYNTHESIS; ABUNDANCES; SUPERNOVAE; GENERAL;

D O I：

10.1086/172180

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present an improved calculation of the cumulative gamma-ray spectrum of Type Ia supernovae during the history of the universe. We follow Clayton & Ward (1975) in using a few Friedmann models and two simple histories of the average galaxian nucleosynthesis rate, but we improve their calculation by modeling the gamma-ray scattering in detailed numerical models of SN Ia's. The results confirm that near 1 MeV the SN Ia background may dominate, and that it is potentially observable, with high scientific importance. A very accurate measurement of the cosmic background spectrum between 0.1 and 1.0 MeV may reveal the turn-on time and the evolution of the rate of Type Ia supernova nucleosynthesis in the universe.

引用

页码：32 / 36

页数：5

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