arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2602.23646astro-ph.HEgr-qcnucl-th
收藏

现实状态方程指导中子星并合后引力波频率

Realistic Equations of State Informing Neutron Star Post-Merger Gravitational-Wave Frequencies

Monash University(莫纳什大学);OzGrav: The ARC Centre of Excellence for Gravitational-wave Discovery(OzGrav:ARC引力波发现卓越中心);Inter-University Centre for Astronomy and Astrophysics, Pune University Campus(天文学与天体物理学跨大学中心,浦那大学校区)

Spencer J. Magnall, Nilaksha Barman, Debarati Chatterjee, Paul D. Lasky, Simon Goode

AI总结:

研究利用现实状态方程计算中子星并合后引力波频率分布,揭示需宽带探测器以测量残骸特性。

摘要:

双中子星并合被认为是产生高温、高速旋转的中子星,其质量可能远超Tolman-Oppenheimer-Volkoff质量。此类残骸的引力波辐射为测量核方程状态在地球实验无法达到的密度和温度提供了独特机会。当前探测器设计受中子星并合的广义相对论流体动力学模拟的引力波信号影响,通常采用混合热处理的方程状态,即冷方程状态通过添加热成分进行修改。我们使用基于相对平均场模型的现实方程状态,一致处理热效应,计算预期峰值引力波频率分布。在方程状态和前体中子星质量上进行边际化,我们显示发射峰值频率范围从约2.5到4 kHz。该分布宽度表明需要具有kHz灵敏度的宽带探测器,并对所谓的并合后优化配置提出质疑。我们显示所提出的KAGRA高频设计相比KAGRA宽带设计更适用于测量并合后残骸。

英文摘要:

Binary neutron star mergers are thought to produce hot, rapidly rotating neutron stars with masses that can far exceed their Tolman-Oppenheimer-Volkoff mass. The gravitational-wave emission from such remnants provides a unique opportunity to measure the nuclear equation of state at densities and temperatures not available to terrestrial experiments. Current detector design is informed by gravitational-wave signals from general relativistic hydrodynamics simulations of neutron star mergers, typically with hybrid thermal treatments for the equation of state, where a cold equation of state is modified by adding a thermal component. We use realistic equations of state based on the relativistic mean field model with consistent treatment of thermal effects to compute the distribution of expected peak gravitational-wave frequencies. Marginalising over equation of state and progenitor neutron star masses, we show the peak frequency of emission ranges from $\sim2.5$ to 4 kHz. The width of this distribution suggests the need for broadband observatories with kHz sensitivity, and calls into question some of the so-called post-merger optimised configurations. We show the proposed KAGRA high-frequency design is well-suited to measuring post-merger remnants when compared to the KAGRA broadband design.

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。

↑