Resonant-plane locking and spin alignment in stellar-mass black-hole binaries: a diagnostic of compact-binary formation
Davide Gerosa, Michael Kesden, Emanuele Berti, Richard O'Shaughnessy, Ulrich Sperhake
备注：
26 pages, 11 figures, 3 tables, accepted in Physical Review D. 4 movies illustrating resonance locking are available online: for links, see footnote 8 of the paper
We study the influence of astrophysical formation scenarios on the precessional dynamics of spinning black-hole binaries by the time they enter the observational window of second- and third-generation gravitational-wave detectors, such as Advanced LIGO/Virgo, LIGO-India, KAGRA and the Einstein Telescope. Under the plausible assumption that tidal interactions are efficient at aligning the spins of few-solar mass black-hole progenitors with the orbital angular momentum, we find that black-hole spins should be expected to preferentially lie in a plane when they become detectable by gravitational-wave interferometers. This "resonant plane" is identified by the conditions ΔΦ=0° or ΔΦ=+/-180°, where ΔΦis the angle between the components of the black-hole spins in the plane orthogonal to the orbital angular momentum. If the angles ΔΦcan be accurately measured for a large sample of gravitational-wave detections, their distribution will constrain models of compact binary formation. In particular, it will tell us whether tidal interactions are efficient and whether a mechanism such as mass transfer, stellar winds, or supernovae can induce a mass-ratio reversal (so that the heavier black hole is produced by the initially lighter stellar progenitor). Therefore our model offers a concrete observational link between gravitational-wave measurements and astrophysics. We also hope that it will stimulate further studies of precessional dynamics, gravitational-wave template placement and parameter estimation for binaries locked in the resonant plane.
The diverse morphology of gravitational wave signals from merging neutron-star white-dwarf binaries
State Key Laboratory of Radio Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences（中国科学院国家天文台射电天文与技术重点实验室）；CAS Key Laboratory for Computational Astrophysics, National Astronomical Observatories, Chinese Academy of Sciences（中国科学院国家天文台计算天体物理重点实验室）；School of Astronomy and Space Sciences, University of Chinese Academy of Sciences（中国科学院大学天文与空间科学学院）；Armagh Observatory and Planetarium（阿马赫天文台和天文馆）；National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences（中国科学院国家天文台/云南天文台）；School of Physical Science and Technology, Lanzhou University（兰州大学物理科学与技术学院）；School of Physics and Technology, Wuhan University（武汉大学物理科学与技术学院）
Inferring host environment properties and gravitational-wave decay time from the eccentricity measurement of dynamically captured binaries
Chennai Mathematical Institute（金奈数学研究所）；Cardiff University（卡迪夫大学）；Montclair State University（蒙克莱尔州立大学）；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））；Leibniz Universität Hannover（汉诺威莱布尼茨大学）
Joint inference of line-of-sight acceleration and orbital eccentricity in neutron-star--black-hole binaries
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（爱因斯坦研究所））；University of Maryland, College Park（马里兰大学帕克分校）
Can a regular black hole be observationally distinguished from singular black holes as spinning lens partner in PSR-BH binaries?
Zel’dovich International Center for Astrophysics, Bashkir State Pedagogical University（别尔哥罗德语国际天体物理中心，巴什基尔国立师范大学）；Institute of Molecule and Crystal Physics, Ufa Federal Research Centre, Russian Academy of Sciences（俄罗斯科学院乌法联邦研究中心分子与晶体物理研究所）；Department of Physics & Astronomy, Bashkir State University（巴什基尔国立大学物理与天文学系）；High Energy Cosmic Ray Research Center, University of North Bengal（北孟加拉大学高能宇宙射线研究中心）
Detection of Gravitational Anomaly at Low Acceleration from a Highest-quality Sample of 36 Wide Binaries with Accurate 3D Velocities
Sejong University（世宗大学）；Korea Astronomy and Space Science Institute（韩国天文与空间科学研究所）；Universidad Nacional Autónoma de México, Instituto de Astronomía（墨西哥国立自治大学天文研究所）；Yonsei University（延世大学）；University of Pittsburgh（匹兹堡大学）
