Gravitational waves from coalescing binary black holes encode the evolution of their spins prior to merger. In the post-Newtonian regime and on the precession timescale, this evolution has one of three morphologies, with the spins either librating around one of two fixed points ("resonances") or circulating freely. In this work we perform full parameter estimation on resonant binaries with fixed masses and spin magnitudes, changing three parameters: a conserved "projected effective spin" $ξ$ and resonant family $ΔΦ=0,π$ (which uniquely label the source), the inclination $θ_{JN}$ of the binary's total angular momentum with respect to the line of sight (which determines the strength of precessional effects in the waveform), and the signal amplitude. We demonstrate that resonances can be distinguished for a wide range of binaries, except for highly symmetric configurations where precessional effects are suppressed. Motivated by new insight into double-spin evolution, we introduce new variables to characterize precessing black hole binaries which naturally reflects the timescale separation of the system and therefore better encode the dynamical information carried by gravitational waves.
Distinguishing between Black Holes and Neutron Stars within a Population of Weak Tidal Measurements
University of Greifswald（格赖夫斯瓦尔德大学）；Canadian Institute for Theoretical Astrophysics, University of Toronto（多伦多大学加拿大理论天体物理研究所）；University of Toronto（多伦多大学）
Periodic Orbits and Gravitational Wave Signatures around the Bonanno--Reuter Regular Black Hole
School of Physics, Damghan University（达姆甘大学物理学院）；Center for Theoretical Physics, Khazar University（哈扎尔大学理论物理中心）；Department of Physics, Faculty of Basic Sciences, University of Mazandaran（马赞德兰大学基础科学学院物理学系）
Periodic Orbits and Their Gravitational-Wave Signatures around a Rotating Black Hole Surrounded by Perfect Fluid Dark Matter
Zhejiang University of Technology（浙江工业大学）；United Center for Gravitational Wave Physics (UCGWP), Zhejiang University of Technology（引力波物理联合中心（UCGWP），浙江工业大学）；Bahauddin Zakariya University, Vehari Campus（巴哈丁·扎卡里亚大学，韦哈里校区）；Khazar University（哈扎尔大学）
Distinguishing gravity theories with networks of space-based gravitational-wave detectors
International Centre for Theoretical Physics Asia-Pacific, University of Chinese Academy of Sciences（国际理论物理中心亚太分 centre，中国科学院大学）；Taiji Laboratory for Gravitational Wave Universe, University of Chinese Academy of Sciences（引力波宇宙太极实验室，中国科学院大学）；Institute of Theoretical Physics, Chinese Academy of Sciences（中国科学院理论物理研究所）；School of Physical Sciences, University of Chinese Academy of Sciences（中国科学院大学物理科学学院）；School of Fundamental Physics and Mathematical Sciences, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences（中国科学院大学杭州高等研究院基础物理与数学学院）
