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arXiv 0911.3535astro-ph.HEgr-qc
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中子星的潮汐形变与实际状态方程及其在双星内旋中的引力波特征

Tidal deformability of neutron stars with realistic equations of state and their gravitational wave signatures in binary inspiral

Tanja Hinderer, Benjamin D. Lackey, Ryan N. Lang, Jocelyn S. Read

摘要:

中子星吸入的引力波信号的早期部分可能产生关于核物质状态方程的可靠信息。恒星内部结构对波形的影响由一个参数表征:潮汐变形能力λ,它测量恒星对伴星扰动潮汐场的四极形变。我们计算了一个广泛的状态方程的lambda,并发现lambda的值跨越一个数量级的状态方程模型考虑的范围。中子星状态方程与引力波观测的早期部分的inspiral之间的区别的可行性分析表明,在λ的测量误差急剧增加的总质量的二进制。将误差与λ的预期范围进行比较,我们发现,在100 Mpc的距离上对双星进行的高级LIGO观测只能探测异常僵硬的状态方程,而拟议中的爱因斯坦望远镜可能会看到一个干净的潮汐信号。

英文摘要:

The early part of the gravitational wave signal of binary neutron star inspirals can potentially yield robust information on the nuclear equation of state. The influence of a star's internal structure on the waveform is characterized by a single parameter: the tidal deformability lambda, which measures the star's quadrupole deformation in response to the companion's perturbing tidal field. We calculate lambda for a wide range of equations of state and find that the value of lambda spans an order of magnitude for the range of equation of state models considered. An analysis of the feasibility of discriminating between neutron star equations of state with gravitational wave observations of the early part of the inspiral reveals that the measurement error in lambda increases steeply with the total mass of the binary. Comparing the errors with the expected range of lambda, we find that Advanced LIGO observations of binaries at a distance of 100 Mpc will probe only unusually stiff equations of state, while the proposed Einstein Telescope is likely to see a clean tidal signature.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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