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arXiv 0710.0418astro-ph
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中子星地壳质量分数

Neutron Star Crustal Mass Fractions

Kelsey L. Hoffman, Jeremy S. Heyl

摘要:

我们正在研究一颗中子星冷却一年后仍然存在的地壳的质量分数。我们使用的冷却曲线对应于中子星刚形成后的不同密度或深度。为了计算中子星的温度随时间的变化,我们假设修改后的Urca过程主导了恒星外层的能量收支。利用一个直到锝的核反应网络,我们计算了在中子星地壳的不同深度处原子核的分布是如何淬灭的。最初的结果表明,$^{28}$ Si是冷却一年后在表面上光学厚度最轻的同位素。

英文摘要:

We are investigating mass fractions on the crust of a neutron star which would remain after one year of cooling. We use cooling curves corresponding with various densities, or depths, of the neutron star just after its formation. We assume the modified Urca process dominates the energy budget of the outer layers of the star in order to calculate the temperature of the neutron star as a function of time. Using a nuclear reaction network up to technetium, we calculate how the distribution of nuclei quenches at various depths of the neutron star crust. The initial results indicate that $^{28}$Si is the lightest isotope to be optically thick on the surface after one year of cooling.

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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