流夸克质量对混合星性质的影响

流夸克质量对混合星性质的影响

包特木尔巴根¹,², 杨兴强¹

1. 南阳师范学院物理与电子工程学院, 河南省南阳 473061; 2. 吉林大学物理学院, 长春 130021

收稿日期:2006-11-29 修回日期:1900-01-01 出版日期:2007-07-26 发布日期:2007-07-26
通讯作者: 包特木尔巴根

Influences of Current Quark Masses on the Properties of Hybrid Stars

BAO Tmurbagan¹,², YANG Xing qiang¹

1. School of Physics and Electronics Engineering, Nanyang Normal University, Nanyang 473061, Henan Province, China; 2.College of Physics, Jilin University, Changchun 130021, China

Received:2006-11-29 Revised:1900-01-01 Online:2007-07-26 Published:2007-07-26
Contact: BAO Tmurbagan

摘要/Abstract

摘要： 利用强子物质的相对论平均场理论和夸克物质的有效质量口袋模型, 研究流夸克质量的选取对混合星性质的影响. 结果表明, 随着流夸克质量的增大, 强子\|夸克相变使密度变大, 超子种类变多, 混合相区域的状态方程变硬, 中子星的最大质量及半径变大. 当奇异流夸克质量由90 MeV增到200 MeV时, 混合星最大质量由1.4 M⊙增至1.63 M⊙（M⊙=1.99×1030kg为太阳质量）, 半径由10.24 km增至11.64 km. 

关键词: 流夸克质量, 混合星, 状态方程, 质量-半径关系

Abstract: The influences of different current quark masses on the properties of hybrid stars were studied via the relativistic mean field theory and the effective mass bag model. The numerical analysis shows that with the increase of the current quark mass the phase transition density increases, the equation of state for the mixed phase region stiffens, the maximum mass and the corresponding radius increase. The maximum mass of the star increases from 1.4 M⊙ to 1.63M⊙ （M ⊙=1.99×1030 kg is the mass of the sun）, and the corresponding radius of the star ranges from 10.24 km to 11.64 km with the increase of the current mass of the strange quark from 90 MeV to 200 MeV.

Key words: current quark mass, hybrid star, equation of state, mass-radius relations

中图分类号:

O413.3

包特木尔巴根,, 杨兴强. 流夸克质量对混合星性质的影响[J]. J4, 2007, 45(04): 629-633.

BAO Tmurbagan,, YANG Xing qiang. Influences of Current Quark Masses on the Properties of Hybrid Stars[J]. J4, 2007, 45(04): 629-633.

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