SHORTEST RECURRENCE PERIODS OF NOVAE

SHORTEST RECURRENCE PERIODS OF NOVAE
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DOI:
10.1088/0004-637x/793/2/136
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发表时间:
2014-04
期刊:
The Astrophysical Journal
影响因子:
--
通讯作者:
M. Kato;H. Saio;I. Hachisu;K. Nomoto
M. Kato;H. Saio;I. Hachisu;K. Nomoto
中科院分区:
其他
文献类型:
--
作者:
M. Kato;H. Saio;I. Hachisu;K. Nomoto

文献摘要

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受最近发现的周期为1年的新星M31 N 2008- 12 a的激励,我们研究了质量吸积白色矮星(WD)上氢壳闪光的最短重现周期。我们讨论的机制,产生一个有限的最小复发期为一个给定的WD质量。通过计算不同WD质量和质量吸积率的不稳定闪光,我们确定了一个非旋转的1.38 M WD的最短重现期约为两个月,质量吸积率为3.6 × 10−7 M年。对于具有非常高的吸积速率(1.5 × 10−7 M yr−1)的超大质量(1.3 M返)WDs,可以实现1年的重现周期。我们修正了氢壳燃烧的稳定性极限,这将有助于计算Ia型超新星的双星演化。
Stimulated by the recent discovery of the 1 yr recurrence period nova M31N 2008-12a, we examined the shortest recurrence periods of hydrogen shell flashes on mass-accreting white dwarfs (WDs). We discuss the mechanism that yields a finite minimum recurrence period for a given WD mass. Calculating the unstable flashes for various WD masses and mass accretion rates, we identified a shortest recurrence period of about two months for a non-rotating 1.38 M☉ WD with a mass accretion rate of 3.6 × 10−7 M☉ yr−1. A 1 yr recurrence period is realized for very massive (≳ 1.3 M☉) WDs with very high accretion rates (≳ 1.5 × 10−7 M☉ yr−1). We revised our stability limit of hydrogen shell burning, which will be useful for binary evolution calculations toward Type Ia supernovae.