| Strange Stars： Can Their Crust Reach the Neutron Drip Density？ |
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| 作者姓名： | Hai Fu and Yong-Feng Huang |
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| 作者单位： | Hai Fu and Yong-Feng Huang
Department of Astronomy，Nanjing University，Nanjing 210093; |
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| 基金项目： | Supported by the National Natural Science Foundation of China |
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| 摘 要： | The electrostatic potential of electrons near the surface of static strange stars at zero temperature is studied within the frame of the MIT bag model. We find that for QCD parameters within rather wide ranges, if the nuclear crust on the strange star is at a density leading to neutron drip, then the electrostatic potential will be insufficient to establish an outwardly directed electric field, which is crucial for the survival of such a crust. If a minimum gap width of 200 fm is brought in as a more stringent constraint, then our calculations will completely rule out the possibility of such crusts. Therefore, our results argue against the existence of neutron-drip crusts in nature.
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| 关 键 词： | 简化三轴坐标系统 中子 密度 静电学 电子 核子 静电粒子 |
Strange Stars: Can Their Crust Reach the Neutron Drip Density? |
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| Hai Fu and Yong-Feng Huang.Strange Stars: Can Their Crust Reach the Neutron Drip Density?[J].Chinese Journal of Astronomy and Astrophysics,2003,3(6):535-542. |
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| Authors: | Hai Fu Yong-Feng Huang |
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| Institution: | DepartmentofAstronomy,NanjingUniversity,Nanjing210093; |
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| Abstract: | The electrostatic potential of electrons near the surface of static strange stars at zero temperature is studied within the frame of the MIT bag model. We find that for QCD parameters within rather wide ranges, if the nuclear crust on the strange star is at a density leading to neutron drip, then the electrostatic potentialwill be insufficient to establish an outwardly directed electric field, which is crucial for the survival of such a crust. If a minimum gap width of 200 fm is brought in as a more stringent constraint, then our calculations will completely rule out the possibility of such crusts. Therefore, our results argue against the existence of neutron-drip crusts in nature. |
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| Keywords: | dense matter - elementary particles - stars: neutron |
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