arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1003.1947astro-ph.HEastro-ph.SR
收藏

中子星中密度依赖超流能隙的旋转化学加热

Rotochemical heating with a density-dependent superfluid energy gap in neutron stars

Nicolás González-Jiménez, Cristóbal Petrovich, Andreas Reisenegger

摘要:

当旋转的中子星失去角动量时,离心力的减少使其收缩。这扰动了每个流体元素,提高了局部压力并导致偏离β平衡,引起释放热量的反应(旋转化学加热)。费尔南德斯和赖森格以前曾研究过这种效应,他们研究的是非超流物质的中子星,而彼得罗维奇和赖森格研究的是超流物质,发现两种情况下的系统都达到了准稳态,对应于压缩(由于角动量的损失)和试图恢复平衡的反应之间的部分平衡。然而,Petrovich和Reisenegger假设超流体能隙的值是恒定的,而理论模型预测的是依赖于密度的能隙振幅,因此能隙取决于恒星的位置。在这项工作中,我们试图区分几个建议的差距模型,比较预测的表面温度测量值最近的毫秒脉冲星,J 0437 -4715。

英文摘要:

When a rotating neutron star loses angular momentum, the reduction of the centrifugal force makes it contract. This perturbs each fluid element, raising the local pressure and originating deviations from beta equilibrium, inducing reactions that release heat (rotochemical heating). This effect has previously been studied by Fernández and Reisenegger for neutron stars of non-superfluid matter and by Petrovich and Reisenegger for superfluid matter, finding that the system in both cases reaches a quasi-steady state, corresponding to a partial equilibration between compression, due to the loss of angular momentum, and reactions that try to restore the equilibrium. However, Petrovich and Reisenegger assumes a constant value of the superfluid energy gap, whereas theoretical models predict density-dependent gap amplitudes, and therefore gaps that depend on the location in the star. In this work, we try to discriminate between several proposed gap models, comparing predicted surface temperatures to the value measured for the nearest millisecond pulsar, J0437-4715.

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。

↑