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流夸克质量对混合星性质的影响 被引量:1

Influences of Current Quark Masses on the Properties of Hybrid Stars
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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1.4M⊙增至1.63M⊙(M⊙=1.99×1030kg为太阳质量),半径由10.24 km增至11.64 km. 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.
出处 《吉林大学学报(理学版)》 CAS CSCD 北大核心 2007年第4期629-633,共5页 Journal of Jilin University:Science Edition
基金 国家自然科学基金(批准号:1027502910675054) 南阳师范学院高层次人才科研启动基金(2006年专项基金)
关键词 流夸克质量 混合星 状态方程 质量-半径关系 current quark mass hybrid star equation of state mass-radius relations
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参考文献15

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二级参考文献27

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