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arXiv 1302.0837astro-ph.HEastro-ph.SR
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二元总体合成和SNIa比率

Binary population synthesis and SNIa rates

S. Toonen, G. Nelemans, M. Bours, S. Portegies Zwart

摘要:

尽管Ia型超新星(SNeIa)在天体物理学的许多领域都具有重要意义,但SNeIa缺乏理论解释。我们调查的潜在贡献的SNeIa率从最常见的祖通道使用二进制人口合成(BPS)代码SeBa。利用SeBa,我们的目标是约束二元过程,如共同的包络相和质量保持效率的白矮星吸积。我们发现,模拟率是不足以解释所观察到的利率。此外,我们还发现白矮星吸积的质量保持效率对吸积速率有显著影响,但不能解释不同BPS程序模拟的吸积速率之间的差异。

英文摘要:

Despite the significance of type Ia supernovae (SNeIa) in many fields in astrophysics, SNeIa lack a theoretical explanation. We investigate the potential contribution to the SNeIa rate from the most common progenitor channels using the binary population synthesis (BPS) code SeBa. Using SeBa, we aim constrain binary processes such as the common envelope phase and the efficiency of mass retention of white dwarf accretion. We find that the simulated rates are not sufficient to explain the observed rates. Further, we find that the mass retention efficiency of white dwarf accretion significantly influences the rates, but does not explain all the differences between simulated rates from different BPS codes.

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