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).
Time-domain phenomenological multipolar waveforms for aligned-spin binary black holes in elliptical orbits
Universitat de les Illes Balears(巴利阿里群岛大学);Universität Zürich(苏黎世大学);Max Plank Institut für Gravitationsphysik (Albert Einstein Institut)(马克斯·普朗克引力物理学研究所(爱因斯坦研究所));Institut de Ciències de l’Espai (ICE, CSIC)(空间科学研究所(欧洲空间信息中心,西班牙高等科学研究委员会));Dutch National Institute for Subatomic Physics (Nikhef)(荷兰国家亚原子物理研究所(尼赫夫))
Adding higher-order spherical harmonics in non-spinning eccentric binary black hole merger waveform models
Kavli Institute for Theoretical Physics, University of California Santa Barbara(加州大学圣塔芭芭拉分校卡弗里理论物理研究所);Theoretical AstroPhysics Including Relativity and Cosmology, California Institute of Technology(加利福尼亚理工学院包括相对论和宇宙学的理论天体物理学);Department of Physics and Center for Computational Research, University of Rhode Island(罗德岛大学物理系与计算研究中心);Department of Physics, University of Massachusetts, Dartmouth(麻省大学达特茅斯分校物理系);Center for Scientific Computing and Data Science Research, University of Massachusetts, Dartmouth(麻省大学达特茅斯分校科学计算与数据科学研究中心);Department of Mathematics, University of Massachusetts, Dartmouth(麻省大学达特茅斯分校数学系)
Adding eccentricity to quasicircular binary-black-hole waveform models
从合并偏心双星黑洞的引力波信号的检测将产生前所未有的信息,在特定的情况下,如致密的星团和三体相互作用的动力学形成的致密双星的形成和演化。地面干涉仪LIGO和Virgo的引力波搜索依赖于准圆轨道上双星的分析波形模型。偏心合并的波形模型发展较少,只有少数的偏心合并的数值模拟是公开的,但几个偏心inspiral模型已经开发出后牛顿膨胀。在这里,我们提出了一种新的方法来转换的主导四极模式的任何圆形的分析双黑洞模型到偏心模型。首先,使用数值模拟,我们研究的额外的振幅和频率调制的偏心信号,不存在于他们的圆形同行。随后,我们确定了这些调制的合适的分析描述,并从指定为我们的训练数据集的12个数值模拟中插入关键参数。这使我们能够重建质量比为3和偏心率为0.2的任何波形的调制幅度和相位。我们发现,新模型与数值模拟的最小重叠约为0.98,在我们所有的测试数据集上,这些数据集以35 Hz的频率从aLIGO A+设计灵敏度开始缩放到50 M $_\odot$黑洞二进制。一个Python包\pyrex可以很容易地执行这种方法的计算。
Applying higher-modes consistency test on GW190814 : lessons on no-hair theorem, nature of the secondary compact object and waveform modeling
作为广义相对论中黑洞“无毛”定理的一个推论,合并准圆双黑洞(BBH)辐射的多极结构(即不同球谐模)完全由内禀参数(即伴黑洞的质量和自旋)决定.在参考文献中。[1,2],我们制定了一个有效的测试,称为“高模式一致性测试”,以检查所观察到的引力波(GW)信号与GR中BBH辐射的预期多极结构的一致性。GW 190814的高质量比合并的检测使得能够观察到超过主导$(\ell, m) = (2,\pm2)$模式的球谐模式;从而提供了一个独特的机会来执行“更高模式一致性测试”。使用不同的国家的最先进的波形模型(IMRPhenomXPHM,IMRPhenomXHM,IMRPhenomHM和SEONNRv4HM_ROM),我们表明,GW 190814强烈赞成“无毛”的假设,假设一般偏离多极结构的辐射的贝叶斯因子$\rm log_{e}\mathcal{B}\sim8$在GR的假设。我们进一步研究了由于不同的波形建模选择以及由于忽略许多高阶模式而产生的任何潜在的系统误差。我们发现,如果波形模型只包括$(\ell, m) = (3,\pm3)$模式在其高次谐波,相同的事件可能会拒绝“无毛”的假设在GR时,检测器的灵敏度提高了一个因素的$12.5$。因此,我们的分析提供了动机,包括尽可能多的高阶模式,在未来的波形模型。
Large-Eccentricity Asymptotics and Fast Analytic Approximation for Fourier modes of Post-Newtonian Eccentric Waveforms
Instituto de Física Téorica UAM-CSIC, Universidad Autónoma de Madrid(马德里自治大学理论物理研究所);Beijing Normal University(北京师范大学);Hangzhou Institute for Advanced Study, UCAS(中国科学院大学杭州高等研究院)
Post-Newtonian theory-inspired framework for characterizing eccentricity in gravitational waveforms
Kavli Institute for Theoretical Physics, University of California Santa Barbara(加州大学圣塔芭芭拉分校卡弗里理论物理研究所);Theoretical AstroPhysics Including Relativity and Cosmology, California Institute of Technology(加州理工学院理论天体物理学(含相对论与宇宙学));Department of Physics, University of California at Santa Barbara(加州大学圣塔芭芭拉分校物理系);International Centre for Theoretical Sciences, Tata Institute of Fundamental Research(塔塔基础研究院国际理论科学中心)
Eccentric and unbound compact binaries in the LIGO-Virgo-KAGRA catalog: parameter estimation and waveform systematics with SEOBNRv6EHM
University of Nottingham(诺丁汉大学);Max Planck Institute for Gravitational Physics (Albert Einstein Institute)(马克斯·普朗克引力物理研究所(阿尔伯特·爱因斯坦研究所));University of Maryland(马里兰大学)
Measuring Eccentricity and Addressing Waveform Systematics in GW231123
Center for Gravitational Physics, The University of Texas at Austin(德克萨斯大学奥斯汀分校引力物理中心);Center for Computational Relativity and Gravitation, Rochester Institute of Technology(罗切斯特理工学院计算相对论与引力中心)
Accurate waveforms for generic planar-orbit binary black holes: The multipolar effective-one-body model SEOBNRv6EHM
Max Planck Institute for Gravitational Physics (Albert Einstein Institute)(马克斯·普朗克引力物理研究所(爱因斯坦研究所));University of Maryland(马里兰大学);Nottingham Centre of Gravity & School of Mathematical Sciences, University of Nottingham(诺丁汉大学引力中心与数学科学学院);Cornell Center for Astrophysics and Planetary Science, Cornell University(康奈尔大学天体物理学与行星科学中心)
Universal phenomenological relations between spherical harmonic modes in non-precessing eccentric binary black hole merger waveforms
Kavli Institute for Theoretical Physics, University of California Santa Barbara(加州大学圣塔芭芭拉分校卡弗里理论物理研究所);Theoretical AstroPhysics Including Relativity and Cosmology, California Institute of Technology(加州理工学院理论天体物理学(含相对论与宇宙学)部门);Department of Physics, University of California at Santa Barbara(加州大学圣塔芭芭拉分校物理系);International Centre for Theoretical Sciences, Tata Institute of Fundamental Research(印度塔塔基础研究院国际理论科学中心)
SEOBNRv5PHM: Next generation of accurate and efficient multipolar precessing-spin effective-one-body waveforms for binary black holes
Max Planck Institute for Gravitational Physics (Albert Einstein Institute)(马克斯·普朗克引力物理研究所(爱因斯坦研究所));University of Maryland(马里兰大学);Perimeter Institute for Theoretical Physics(理论物理前沿研究所)
Black-hole - neutron-star mergers: new numerical-relativity simulations and multipolar effective-one-body model with spin precession and eccentricity
Universitat de les Illes Balears(巴利阿里群岛大学);Friedrich-Schiller-Universität Jena(耶拿弗里德里希·席勒大学);The Pennsylvania State University(宾夕法尼亚州立大学);University of California, Berkeley(加州大学伯克利分校);Università di Bologna(博洛尼亚大学)