标题： 中子星上的山脉：吸积的与非吸积的地壳 显示英文标题

标题： Mountains on Neutron Stars: Accreted vs. Non-Accreted crusts

摘要： 本文的目的是比较两种情况下的孤立中子星，一种是未吸积地壳的中子星，另一种是具有吸积地壳的吸积中子星，并试图估计哪一种更可能成为引力波的良好来源。 为了做到这一点，我们必须评估在这两种情况下地壳所能承受的最大“山峰”。 我们首先使用Ushomirsky、Cutler和Bildsten（2000）的形式理论进行计算，发现两种情况下的最大四极矩非常相似，非吸积地壳所能承受的“山峰”稍大一些。 然后我们为这个问题开发了一种扰动形式理论，这使我们能够放弃Cowling近似并更好地控制边界条件。 使用这种形式理论确认了两种情况之间差异不大，但得出的结果比Ushomirsky、Cutler和Bildsten（2000）的形式理论得到的结果大约高一个数量级。 显示英文摘要

摘要： The aim of this paper is to compare the two cases of an isolated neutron star, with a non-accreted crust, and that of an accreting neutron star, with an accreted crust, and try to estimate which one of the two would make a better source of gravitational waves. In order to do this we must evaluate the maximum ``mountain'' that the crust can sustain in these two cases. We first do this using the formalism of Ushomirsky, Cutler and Bildsten (2000) and find that the maximum quadrupole is very similar in the two cases, with the non-accreted crust sustaining a slightly larger mountain. We then develop a perturbation formalism for the problem, that allows us to drop the Cowling approximation and have more control over the boundaries. The use of this formalism confirms that there is not much difference between the two cases, but leads to results approximately one order of magnitude larger than those we obtain with the formalism of Ushomirsky, Cutler and Bildsten (2000).