论文标题
星号学：具有现实状态方程的中子星的径向振荡
Asteroseismology: radial oscillations of neutron stars with realistic equation of state
论文作者
论文摘要
我们研究了四维一般相对论中非旋转中子星（NSS）的径向振荡。 NS的内部在最近提出的状态（EOS）的多组分逼真方程（IST）中建模。特别是，我们考虑了具有两组模型参数的IST EOS，它们都重现了正常核物质的所有已知特性，对质子流量约束，在核核核粉中产生的强子多重性提供了高质量的描述，与天体物理学观察值和NS-NS合并的观测数据一致。 我们计算了12个最低的径向振荡模式，它们的频率和相应的本征函数，以及两个不同模型集的六个选定的基准NS（具有不同的半径和1.2、1.5和1.9太阳能肿块）的较大频率分离。计算出的频率显示了它们的持续生长，而NS中央巴属密度的增加。此外，我们发现针对基本模式计算的第一个本本函数的行为，绝热指数和声音轮廓的速度，可用于探测NSS的内部结构，并使用Asterosealosology数据探测NSS的内部结构。
We study radial oscillations of non-rotating neutron stars (NSs) in four-dimensional General Relativity. The interior of the NS was modelled within a recently proposed multicomponent realistic equation of state (EoS) with the induced surface tension (IST). In particular, we considered the IST EoS with two sets of model parameters, that both reproduce all the known properties of normal nuclear matter, give a high quality description of the proton flow constraint, hadron multiplicities created in nuclear-nuclear collisions, consistent with astrophysical observations and the observational data from the NS-NS merger. We computed the 12 lowest radial oscillation modes, their frequencies and corresponding eigenfunctions, as well as the large frequency separation for six selected fiducial NSs (with different radii and masses of 1.2, 1.5 and 1.9 solar masses) of the two distinct model sets. The calculated frequencies show their continuous growth with an increase of the NS central baryon density. Moreover, we found correlations between the behaviour of first eigenfunction calculated for the fundamental mode, the adiabatic index and the speed of sound profile, which could be used to probe the internal structure of NSs with the asteroseismology data.
