| What Can the Redshift Observed in EXO 0748-676 Tell Us？ |
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| 作者姓名： | Ren-Xin Xu |
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| 作者单位： | Ren-Xin XuDepartment of Astronomy，School of Physics，Peking University，Beijing 100871; rxxu@bac.pku.edu.cn |
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| 基金项目： | Supported by the National Natural Science Foundation of China. |
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| 摘 要： | The mass-radius relations for bare and crusted strange stars are calculated with the bag model. Comparing these relations with the observed one derived from the redshift of EXO 0748-676, we come to the conclusion that it is incorrect to say that EXO 0748 676 cannot be a strange star. Various strange star models can show that EXO 0748-676 could have a mass of (1.3 - 1.7)M⊙ and a radius of(8.4 - 11.4) km. It is proposed that a proportion of nascent strange stars could be bare and have masses - 0.1 M⊙, and their masses increased over a long period of accretion.
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| 关 键 词： | 恒星 密度物质 中子 模型参数 |
What Can the Redshift Observed in EXO 0748-676 Tell Us? |
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| Ren-Xin Xu.What Can the Redshift Observed in EXO 0748-676 Tell Us?[J].Chinese Journal of Astronomy and Astrophysics,2003,3(1):33-37. |
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| Authors: | Ren-Xin Xu |
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| Institution: | DepartmentofAstronomy,SchoolofPhysics,PekingUniversity,Beijing100871 |
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| Abstract: | The mass-radius relations for bare and crusted strange stars are calculated with the bag model. Comparing these relations with the observed one derived from the redshift of EXO 0748-676, we come to the conclusion that it is incorrect to say that EXO 0748-676 cannot be a strange star. Various strange star models can show that EXO 0748-676 could have a mass of (1.3 - 1.7) M and a radius of (8.4 - 11.4) km. It is proposed that a proportion of nascent strange stars could be bare and have masses - 0.1M, and their masses increased over a long period of accretion. |
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| Keywords: | stars: fundamental parameters - dense matter - stars: neutron |
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