Do current astronomical observations exclude the existence of nonstrange quark stars?
文献类型：期刊论文
| 作者 | Zhao, Tong; Zheng, Wei2; Wang, Fei; Li, Cheng-Ming; Yan, Yan4; Huang, Yong-Feng; Zong, Hong-Shi |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2019 |
| 卷号 | 100期号:4页码:43018 |
| ISSN号 | 2470-0010 |
| 关键词 | EQUATION-OF-STATE NEUTRON-STAR BAG CONSTANT MODEL DENSITY |
| DOI | 10.1103/PhysRevD.100.043018 |
| 英文摘要 | As is pointed out in a recent work [Phys. Rev. Lett. 120, 222001 (2018)], quark matter may not be strange. Inspired by this argument, we use a new self-consistent mean field approximation method to study the equation of state of cold dense matter within the framework of the two-flavor NJL model. Then the mass-radius relationship of two-flavor pure quark stars is studied. In the new self-consistent mean field approximation method we introduced, there is a free parameter a, which reflects the weight of different interaction channels. In principle, a should be determined by experiments rather than the self-consistent mean field approximation itself. In this paper, thus, the influence of the variation of a on the critical chemical potential of chiral phase transition and the stiffness of the equation of state (EOS) are thoroughly explored. The stiffness of the EOS can be increased greatly to support a two-solar-mass pure quark star when a is greater than 0.9, because the contribution from the vector term is retained by the Fierz transformation. Our result is also within the constraints on the radius from the recent data analysis of the tidal deformability. This means that the current theoretical calculations and astronomical observations cannot rule out the possibility of a two-flavor pure quark star. |
| 学科主题 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/26957]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 作者单位 | 1.Changzhou Univ, Sch Math & Phys, Changzhou 213164, Jiangsu, Peoples R China 2.Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China 3.Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China 4.Yangzhou Univ, Coll Phys Sci & Technol, Yangzhou 225009, Jiangsu, Peoples R China 5.Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Jiangsu, Peoples R China 6.Nanjing Univ, Dept Astron, Nanjing 210093, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Tong,Zheng, Wei,Wang, Fei,et al. Do current astronomical observations exclude the existence of nonstrange quark stars?[J]. PHYSICAL REVIEW D,2019,100(4):43018. |
| APA | Zhao, Tong.,Zheng, Wei.,Wang, Fei.,Li, Cheng-Ming.,Yan, Yan.,...&Zong, Hong-Shi.(2019).Do current astronomical observations exclude the existence of nonstrange quark stars?.PHYSICAL REVIEW D,100(4),43018. |
| MLA | Zhao, Tong,et al."Do current astronomical observations exclude the existence of nonstrange quark stars?".PHYSICAL REVIEW D 100.4(2019):43018. |
入库方式： OAI收割
来源：理论物理研究所
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