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arXiv 2108.03324nucl-thastro-ph.HE
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中子星并合条件下的β平衡

Beta equilibrium under neutron star merger conditions

Mark G. Alford, Alexander Haber, Steven P. Harris, Ziyuan Zhang

AI总结:

本研究基于IUF和SFHo相对论平均场模型,计算了中子星并合条件下1 MeV<T≲5 MeV区间β平衡的非零温度修正,发现其对Urca速率计算至关重要,忽略会导致十倍以上误差。

摘要:

我们计算了中子星并合条件下、温度范围为1 MeV < T ≲ 5 MeV时核物质中β平衡条件的非零温度修正。我们基于IUF和SFHo相对论平均场模型,采用对核物质的自洽描述改进了先前的研究工作,其中包括对核子使用相对论色散关系,我们证明这一点在这些模型中至关重要。我们发现,非零温度修正的量级可达10至20 MeV,对Urca过程速率的准确计算具有重要作用;若忽略该修正,Urca速率的计算结果可能会出现10倍及以上的偏差。

英文摘要:

We calculate the nonzero-temperature correction to the beta equilibrium condition in nuclear matter under neutron star merger conditions, in the temperature range $1\,$MeV$ < T \lesssim 5\,$MeV. We improve on previous work by using a consistent description of nuclear matter based on the IUF and SFHo relativistic mean field models. This includes using relativistic dispersion relations for the nucleons, which we show is essential in these models. We find that the nonzero-temperature correction can be of order $10$ to $20\,$MeV, and plays an important role in the correct calculation of Urca rates, which can be wrong by factors of $10$ or more if it is neglected.

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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