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arXiv 1105.0080nucl-th
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致密星的核物质及其性质

Nuclear Matter for compact stars and its properties

Partha Roy Chowdhury

摘要:

利用密度相关的有效核子相互作用,确定了β平衡电荷中性中子星(NS)物质的纯核子物态方程。这EoS被发现,以满足从所观察到的中子星的质量半径和流量数据从重离子碰撞的约束。J1614-2230毫秒脉冲双星的最新观测。Demorest等人[1]认为质量在(1.97 \pm 0.04)M_ \odot(M_ \odot,太阳质量)范围内。大多数涉及奇异物质的EoS,如K介子凝聚或超子,倾向于预测远低于2.0 M_ \odot的最大质量,因此被排除在外。我们能够再现旋转和静态NS的测量质量-半径关系。我们保证恒星的自转速度不超过r模不稳定性所限定的频率时,最大质量约为1.95 M_ \odot,半径约为10 km。

英文摘要:

A pure nucleonic equation of state (EoS) for beta equilibrated charge neutral neutron star (NS) matter is determined using density dependent effective NN interaction. This EoS is found to satisfy both the constraints from the observed mass-radius of neutron stars and flow data from heavy-ion collisions. Recent observations of the binary millisecond pulsar J1614-2230 by P. B. Demorest et al. [1] suggest that the masses lie within (1.97\pm 0.04) M_\odot (M_\odot, solar mass). Most EoS involving exotic matter, such as kaon condensates or hyperons, tend to predict maximum masses well below 2.0M_\odot and are therefore ruled out. We are able to reproduce the measured mass-radius relationship for rotating and static NS. We ensure that the star rotating not faster than the frequency limited by r-mode instability gives the maximum mass about 1.95M_\odot with radius about 10 kilometer.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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