| The Relation between the Critical Accretion Rate of Progenitors of SNe Ia and Metallicity |
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| 作者姓名： | Christopher A. Tout |
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| 作者单位： | Centre for |
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| 基金项目： | Supported by the National Natural Science Foundation of China. |
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| 摘 要： | A carbon-oxygen white dwarf may explode in a Type Ia supernova by accreting matter from its companion via either Roche lobe overflow or from winds, but there exists a critical accretion rate of the progenitor system for the explosion. We study the relation between the critical accretion rate and the metallicity via an AGB star approach. The result indicates that the critical accretion rate depends not only on the hydrogen mass fraction and the white dwarf mass, but also on the metallicity. The effect of the metallicity is smaller than that of the white dwarf mass. We show that it is reasonable to use the model with stellar mass 1.6 M⊙for real white dwarfs.
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| 关 键 词： | 恒星 超新星 天体 吸积现象 |
The Relation between the Critical Accretion Rate of Progenitors of SNe Ia and Metallicity |
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| Christopher A. Tout.The Relation between the Critical Accretion Rate of Progenitors of SNe Ia and Metallicity[J].Chinese Journal of Astronomy and Astrophysics,2006,6(4):461-469. |
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| Authors: | Xiang-Cun Meng Xue-Fei Chen Christopher ATout Zhan-Wen Han |
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| Institution: | [1]National Astronomical Observatories / Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011 [2]Graduate School of Chinese Academy of Sciences, Beijing 100049 [3]Institute of Astronomy, The Observatories, Madingley Road, Cambridge CB3 0HA, England [4]Centre for Stellar and Planetary Astrophysics, School of Mathematics, Monash University, Clayton, Victoria 3800, Australia |
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| Abstract: | |
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| Keywords: | stars: evolution - star: AGB - star: supernova: general |
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