In preparation for future space-borne gravitational-wave (GW) detectors, should the modelling effort focus on high-precision vacuum templates or on the astrophysical environment of the sources? We perform a systematic comparison of the phase contributions caused by 1) known environmental effects in both gaseous and stellar matter backgrounds, or 2) high-order post-Newtonian {(PN)} terms in the evolution of mHz GW sources {during the inspiral stage of massive binaries}. We use the accuracy of currently available analytical waveform models as a benchmark {value, finding} the following trends: the largest unmodelled phase contributions are likely environmental rather than PN for binaries lighter than $\sim 10^7/(1+z)^2$~M$_{\odot}$, where $z$ is the redshift. Binaries heavier than $\sim 10^8/(1+z)$~M$_{\odot}$ do not require more accurate {inspiral} waveforms due to low signal-to-noise ratios (SNRs). For high-SNR sources, environmental {phase contributions} are relevant at low redshift, while high-order vacuum templates are required at $z > 4$. Led by these findings, we argue that including environmental effects in waveform models should be prioritised in order to maximize the science yield of future mHz detectors.
Self-supervised reconstruction of transients in data from space-borne gravitational-wave detectors
Center for Gravitational Wave Experiment, National Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences（中国科学院力学研究所微重力实验室引力波实验中心）；Taiji Laboratory for Gravitational Wave Universe (Beijing/Hangzhou), University of Chinese Academy of Sciences (UCAS)（中国科学院大学太极引力波宇宙实验室（北京/杭州））
pespace: A new tool of GPU-accelerated and auto-differentiable response generation and likelihood evaluation for space-borne gravitational wave detectors
University of Science and Technology of China（中国科学技术大学）；Guizhou University（贵州大学）
Probing the Spins of Supermassive Black Holes with Gravitational Waves from Surrounding Compact Binaries
合并的致密黑洞（BH）双星可能存在于超大质量黑洞（SMBH）周围的核星团中，如Sgr A $^\ast$。它们也可能形成于活动星系核的吸积盘中。这种紧凑的双星可以发射低频带（0.001-1 Hz）的引力波（GW），可以被几个计划中的星载GW天文台探测到。我们表明，紧凑的二进制的轨道轴可能会经历显着的变化，由于与SMBH的自旋的帧拖动效应。轨道轴的动力学行为可以被理解为一种共振现象。我们表明，二进制轨道轴的变化率编码的SMBH的自旋信息。因此，从SMBH周围的致密双星中探测GW，特别是与双星轨道轴变化相关的波形调制，可以为SMBH的自旋提供新的探测。
Gravitational waveforms from periodic orbits around Gauss-Bonnet black holes
Chongqing Normal University（重庆师范大学）；Fuyang University of Technology（阜阳职业技术学院）；Universidade Federal de Campina Grande（坎皮纳格兰德联邦大学）；Universidade de São Paulo（圣保罗大学）
Hierarchical Parameter Estimation for Intrinsic Parameters of Extreme-mass-ratio Inspirals Using Deep Learning
Huai’an University（淮阴大学）；Shanghai Astronomical Observatory, Chinese Academy of Sciences（中国科学院上海天文台）；Hangzhou Institute for Advanced Study, UCAS（中国科学院大学杭州高等研究院）；Key Laboratory of Radio Astronomy and Technology, Chinese Academy of Sciences（中国科学院射电天文技术重点实验室）；Shanghai Frontiers Science Center for Gravitational Wave Detection（引力波探测上海前沿科学中心）；Center for Gravitational Wave Experiment, National Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences（中国科学院力学研究所国家微重力实验室引力波实验中心）
