Type-la supernovae in semidetached binaries

被引：27

作者：

Fedorova, AV ^{[1
]}

Tutukov, AV ^{[1
]}

Yungelson, LR ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Astron, Moscow 119017, Russia

来源：

ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS | 2004年 / 30卷 / 02期

基金：

俄罗斯基础研究基金会;

关键词：

stars-structure and evolution; binaries; accretion; supernovae;

D O I：

10.1134/1.1646692

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We consider the evolutionary scenarios for close binaries that lead to the formation of semidetached systems in which a white dwarf can accumulate the Chandrasekhar mass through mass accretion from its companion, a main sequence star or a subgiant of mass M similar to 2M(circle dot). Such dwarfs probably explode as type-la supernovae or collapse to form a neutron star. The population synthesis method is used to analyze the dependence of the model rate of these events in the Galaxy on the common envelope parameter, the mass transfer rate, and the response of a main-sequence star to helium accretion at an intermediate evolutionary stage. The rate of explosions in semidetached systems of this type in the Galaxy was found to be no higher than similar or equal to0.2 X 10(-3) yr(-1), which is less than 10% of the lower level for the empirically estimated SNe Ia rate. (C) 2004 MAIK "Nauka/Interperiodica".

引用

页码：73 / 85

页数：13

共 64 条

[1] Thermohaline-mixing - binary evolution [J].