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arXiv 2104.11705gr-qc
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有效单体形式体系中偏心自旋排列双星的辐射反作用力和多极波形

Radiation-reaction force and multipolar waveforms for eccentric, spin-aligned binaries in the effective-one-body formalism

Mohammed Khalil, Alessandra Buonanno, Jan Steinhoff, Justin Vines

摘要:

虽然大多数双星在进入LIGO/Virgo频段之前预计已经循环,但这些双星中的一小部分可能具有不可忽略的轨道偏心率,这取决于它们的形成通道。因此,重要的是要准确地模型偏心率的影响,用于检测这些二进制的波形模型,推断其属性,并阐明其天体物理环境。我们发展了一个多极有效单体(EOB)偏心波形模型,其组件的自旋与轨道角动量对齐或反对齐的紧凑双星。波形模型包含辐射-反作用力和引力模式的偏心效应,通过第二后牛顿(PN)顺序,包括尾部效应,自旋-轨道和自旋-自旋耦合。我们以因式分解的形式重铸了PN扩展的偏心辐射反作用力和模式,以便新导出的项可以直接包含在目前用于LIGO/Virgo分析的最先进的准圆形轨道EOB模型中(即,SEOBNRv 4 HM模型)。

英文摘要:

While most binary inspirals are expected to have circularized before they enter the LIGO/Virgo frequency band, a small fraction of those binaries could have non-negligible orbital eccentricity depending on their formation channel. Hence, it is important to accurately model eccentricity effects in waveform models used to detect those binaries, infer their properties, and shed light on their astrophysical environment. We develop a multipolar effective-one-body (EOB) eccentric waveform model for compact binaries whose components have spins aligned or anti-aligned with the orbital angular momentum. The waveform model contains eccentricity effects in the radiation-reaction force and gravitational modes through second post-Newtonian (PN) order, including tail effects, and spin-orbit and spin-spin couplings. We recast the PN-expanded, eccentric radiation-reaction force and modes in factorized form so that the newly derived terms can be directly included in the state-of-the-art, quasi-circular--orbit EOB model currently used in LIGO/Virgo analyses (i.e., the SEOBNRv4HM model).

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