| Population Synthesis for the Symbiotic Stars with Main-sequence Accretors |
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| 作者姓名： | Guo-Liang Lü |
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| 作者单位： | Guo-Liang Lu，Chun-Hua Zhu，Bin Wu and Zhan-Wen Han National Astronomical Observatories / Yunnan Observatory，Chinese Academy of Sciences，Kunming 650011; Graduate School of Chinese Academy of Sciences，Beijing 100049 Department of Physics，Xinjiang University，Urumqi 830046 |
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| 基金项目： | Supported by the National Natural Science Foundation of China. |
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| 摘 要： | Using a population synthesis code, we have investigated the formation of symbiotic systems in which the hot component is a main-sequence star that is accreting matter from the cool component via Roche lobe overflow (RLOF). The RLOF can be divided into two cases: dynamically unstable and stable. In the first case, the birthrate of symbiotic stars is 0.056 yr-1 or 0.045 yr-1 depending on different assumptions; in the stable RLOF case, it is 0.002 yr-1 or 0.005 yr-1. The number of symbiotic stars with main-sequence accretors and unstable RLOF in our galaxy is about 5, that with stable RLOF is about 60 to 280. Comparison between our results with those of Yungelson et al. shows that symbiotic stars with MS accretors make only a small contribution ((?) 8%) to the whole population of symbiotic stars in the Galaxy.
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| 关 键 词： | 共生 二进位 天体 吸积现象 序列 |
Population Synthesis for the Symbiotic Stars with Main-sequence Accretors |
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| Chun-Hua Zhu,Bin Wu,Zhan-Wen Han.Population Synthesis for the Symbiotic Stars with Main-sequence Accretors[J].Chinese Journal of Astronomy and Astrophysics,2006,6(4):447-454. |
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| Authors: | Chun-Hua Zhu Bin Wu Zhan-Wen Han |
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| Abstract: | Using a population synthesis code, we have investigated the formation of symbiotic systems in which the hot component is a main-sequence star that is accreting matter from the cool component via Roche lobe overflow (RLOF). The RLOF can be divided into two cases: dynamically unstable and stable. In the first case, the birthrate of symbiotic stars is 0.056 yr-1 or 0.045 yr-1 depending on different assumptions; in the stable RLOF case, it is 0.002 yr-1 or 0.005 yr-1. The number of symbiotic stars with main-sequence accretors and unstable RLOF in our galaxy is about 5, that with stable RLOF is about 60 to 280. Comparison between our results with those of Yungelson et al. shows that symbiotic stars with MS accretors make only a small contribution ((?) 8%) to the whole population of symbiotic stars in the Galaxy. |
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| Keywords: | binaries: symbiotic - accretion: accretion disks - stars: evolution - main-sequence star |
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