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arXiv 2507.04471gr-qcastro-ph.HEhep-th
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不考虑相对论的双星系统演化多参数展开

A multi-parameter expansion for the evolution of asymmetric binaries in astrophysical environments

Gran Sasso Science Institute (GSSI)(格兰萨索科学研究所);INFN, Laboratori Nazionali del Gran Sasso(意大利国家核物理研究所,格兰萨索国家实验室)

Sayak Datta, Andrea Maselli

AI总结:

本文提出了一种多参数方法,用于建模嵌入在一般物质分布中的非对称双星系统,能够有效描述其动力学和引力波辐射。

摘要:

具有大质量不对称性的紧致双星系统——如极端和中间质量比螺旋系统——是探测其演化环境的独特探针。它们的长寿命和复杂动力学允许精确推断源属性,前提是波形模型足够准确以捕捉轨道演化的全部复杂性。在本文中,我们开发了一种多参数形式化方法,受真空扰动理论启发,用于建模嵌入在一般物质分布中的非对称双星系统,具有径向和切向压力。在偏离Schwarzschild度规较小的区域,相关于大多数天体物理场景,该系统允许简化描述,其中度规和流体扰动可以转化为与真空情况密切相关的波动方程。该框架提供了一种实用方法,用于建模双星在现实物质分布中的动力学和引力波辐射,并可以模块化地与现有真空源结果结合。

英文摘要:

Compact binaries with large mass asymmetries - such as Extreme and Intermediate Mass Ratio Inspirals - are unique probes of the astrophysical environments in which they evolve. Their long-lived and intricate dynamics allow for precise inference of source properties, provided waveform models are accurate enough to capture the full complexity of their orbital evolution. In this work, we develop a multi-parameter formalism, inspired by vacuum perturbation theory, to model asymmetric binaries embedded in general matter distributions with both radial and tangential pressures. In the regime of small deviations from the Schwarzschild metric, relevant to most astrophysical scenarios, the system admits a simplified description, where both metric and fluid perturbations can be cast into wave equations closely related to those of the vacuum case. This framework offers a practical approach to modeling the dynamics and the gravitational wave emission from binaries in realistic matter distributions, and can be modularly integrated with existing results for vacuum sources.

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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