标题： 中子星中具有夸克的准正则g模 显示英文标题

标题： Quasi-normal g-modes of neutron stars with quarks

摘要： 中子星的准正则振荡模式为利用引力波天文学探测其内部组成提供了一种手段。 我们利用广义相对论的线性化摄动方程计算含有夸克物质的中子星的成分依赖的核心g模的频率和阻尼时间。 我们发现，如同Cowling近似中那样忽略由于振荡流体引起的背景度规扰动，会对高质星的g模频率产生高达10%的低估，具体取决于核状态方程的参数以及混合相是如何构建的。 对于核子（混合）中子星，g模频率与中心轻子（或结合轻子和夸克）分数呈良好的线性比例关系。 我们的研究结果表明，有无夸克的中子星在准正则g模谱方面明显不同，因此可能在将来对合并中子星的引力波观测中被区分开来。 显示英文摘要

摘要： Quasi-normal oscillation modes of neutron stars provide a means to probe their interior composition using gravitational wave astronomy. We compute the frequencies and damping times of composition-dependent core g-modes of neutron stars containing quark matter employing linearized perturbative equations of general relativity. We find that ignoring background metric perturbations due to the oscillating fluid, as in the Cowling approximation, underestimates the g-mode frequency by up to 10% for higher mass stars, depending on the parameters of the nuclear equation of state and how the mixed phase is constructed. The g-mode frequencies are well-described by a linear scaling with the central lepton (or combined lepton and quark) fraction for nucleonic (hybrid) stars. Our findings suggest that neutron stars with and without quarks are manifestly different with regards to their quasi-normal g-mode spectrum, and may thus be distinguished from one another in future observations of gravitational waves from merging neutron stars.