走向真正的中子星地震学：解释弹性和超流性
Towards real neutron star seismology: Accounting for elasticity and superfluidity
摘要：
研究了弹性地壳对超流中子星振荡谱的影响。在两个流体形式主义，我们考虑牛顿恒星模型，包括一个成熟的中子星的相关成分。地核是由超流中子和带电粒子的混合物形成的，而地壳内部则是由超流中子渗透的原子核晶格描述的。我们线性化的泊松和非旋转超流星的守恒方程和研究的弹性，夹带和成分分层的剪切和声学模式的影响。在地核和地壳中，卷吸都是从核子有效质量的最新结果导出的。作为一个本征值问题求解的扰动方程，我们发现，在地壳中的超流中子和它们的大的有效质量的存在可能有显着的影响，对恒星的振荡谱。
英文摘要：
We study the effects of an elastic crust on the oscillation spectrum of superfluid neutron stars. Within the two fluid formalism, we consider Newtonian stellar models that include the relevant constituents of a mature neutron stars. The core is formed by a mixture of superfluid neutrons and a conglomerate of charged particles, while the inner crust is described by a lattice of nuclei permeated by superfluid neutrons. We linearise the Poisson and the conservation equations of nonrotating superfluid stars and study the effects of elasticity, entrainment and composition stratification on the shear and acoustic modes. In both the core and the crust, the entrainment is derived from recent results for the nucleon effective mass. Solving the perturbation equations as an eigenvalue problem, we find that the presence of superfluid neutrons in the crust and their large effective mass may have significant impact on the star's oscillation spectrum.
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