论文标题
原子核的有限大小对中子恒星剪切模量和扭转振荡的影响
Effects of finite sizes of atomic nuclei on shear modulus and torsional oscillations in neutron stars
论文作者
论文摘要
中子恒星物质的剪切模量是确定中子恒星扭转振荡的重要特性之一。我们考虑了球形核的有限大小对剪切模量的影响，并检查了地壳扭转振荡的频率。剪切模量由于有限尺寸效应而降低，这又降低了扭转振荡的频率。特别是，有限大小的效应对于具有较大方位角量子数和核对称能量较弱的中子星模型的振荡变得更加至关重要。实际上，当人们从中子恒星中识别出磁效应可忽略的中子恒星的准周期振荡时，具有地壳扭转振荡时，在高于$ \ sim 100 $ hz的频率下，有限尺寸的效应可能更为重要。
The shear modulus of neutron star matter is one of the important properties for determining torsional oscillations in neutron stars. We take into account the effects of finite sizes of spherical nuclei on the shear modulus and examine the frequencies of crustal torsional oscillations. The shear modulus decreases owing to the finite-size effect, which in turn decreases the frequencies of torsional oscillations. In particular, the finite-size effect becomes more crucial for oscillations with a larger azimuthal quantum number and for neutron star models with a weaker density dependence of nuclear symmetry energy. In practice, when one identifies the quasi-periodic oscillations from a neutron star, where the magnetic effect is negligible, with crustal torsional oscillations, the finite-size effect can be more significant at frequencies higher than $\sim 100$ Hz.
