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arXiv 1803.01437nucl-th
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典型质量中子星的半径与手征有效场论

The radius of a typical-mass neutron star and chiral effective field theory

Francesca Sammarruca, Randy Millerson

摘要:

我们利用最近得到的高质量手征核子-核子势(直到手征展开的五阶)和手征三核子力,从物态方程出发计算了中子星的质量和半径。我们的重点是半径为1.4 M_{Sun}中子星,我们报告的预测是一致的,与最近的限制。我们还显示了完整的M(R)关系,直到它们各自的最大质量。除了微观预测来自手征力的密度,状态方程通过多方延拓得到。然而,1.4 M_{Sun}中子星的半径对高密度外推几乎不敏感。

英文摘要:

We calculate neutron star masses and radii from equations of state based on recent high-quality chiral nucleon-nucleon potentials up to fifth order of the chiral expansion and the leading chiral three- nucleon force. Our focus is on the radius of a 1.4 M_{Sun} neutron star, for which we report predictions that are consistent with the most recent constraints. We also show the full M(R) relations up to their respective maximum masses. Beyond the densities for which microscopic predictions are derived from chiral forces, the equations of state are obtained via polytropic continuations. However, the radius of a 1.4 M_{Sun} neutron star is nearly insensitive to the high-density extrapolation.

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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