Variations in the instrumental noise of the Laser Interferometer Space Antenna (LISA) over time are expected as a result of e.g. scheduled satellite operations or unscheduled glitches. We demonstrate that these fluctuations can be leveraged to improve the sensitivity to stochastic gravitational wave backgrounds (SGWBs) compared to the stationary noise scenario. This requires optimal use of data segments with downward noise fluctuations, and thus a data analysis pipeline capable of analysing and combining shorter time segments of mission data. We propose that simulation based inference is well suited for this challenge. In an approximate, but state-of-the-art, modeling setup, we show by comparison with Fisher Information Matrix estimates that the optimal information gain can be achieved in practice.
Gravitational-Wave Background from Extragalactic Double White Dwarfs for LISA
Laboratoire Lagrange, Observatoire de la Côte d'Azur, Université Côte d'Azur, CNRS(拉格朗日实验室,地中海蔚蓝海岸天文台,蔚蓝海岸大学,法国国家科学研究中心);Artemis, Observatoire de la Côte d'Azur, Université Côte d'Azur, CNRS(阿耳忒弥斯实验室,地中海蔚蓝海岸天文台,蔚蓝海岸大学,法国国家科学研究中心);INFN, Sezione di Milano-Bicocca(意大利国家核物理研究所,米兰比可卡分部)
本研究使用 COSMIC 代码评估河外双白矮星对 LISA 探测随机引力波背景的贡献,发现该信号 4 年后可被探测,且其振幅受恒星形成率和双星演化模型影响显著。
Alternative LISA-TAIJI networks: polarization separation of the stochastic gravitational wave background
Institute of Fundamental Physics and Quantum Technology, Ningbo University(宁波大学基础物理与量子技术研究院);Department of Physics, School of Physical Science and Technology, Ningbo University(宁波大学物理科学与技术学院);Department of Physics, Faculty of Arts and Sciences, Beijing Normal University(北京师范大学艺术与科学学院物理系)
Bayesian P-spline recovery of stochastic gravitational-wave backgrounds in LISA
The University of Auckland(奥克兰大学);Auckland University of Technology(奥克兰理工大学);Université Côte d’Azur(蔚蓝海岸大学);Observatoire de la Côte d’Azur(蔚蓝海岸天文台);CNRS(法国国家科学研究中心)
Spectral separation of the stochastic gravitational-wave background for LISA: galactic, cosmological and astrophysical backgrounds
在其观测波段,激光干涉仪空间天线(LISA)将同时观测不同来源的随机引力波背景(SGWB)信号;来自银河系白矮星双星的轨道调制波形,一个双星黑洞产生的背景,并可能是宇宙学产生的SGWB。我们模拟了银河系白矮星双星的引力波发射的朗伯\cite{Lamberts}分布的基础上,并确定了一个复杂的波形从银河系前景。利用LISA探测到的银河系调制信号,利用Fisher信息和马尔可夫链蒙特卡罗方法对不同信号源的LISA噪声和参数进行了估计,并提出了相应的数据分析策略。我们同时估计银河系前景,天体物理和宇宙学背景,并估计未来的LISA观测SGWB在光谱域的3个通道$ A $,$ E $和$ T $的探测限。在预期的天体物理背景和银河系前景的背景下,宇宙学背景能量密度约为$ Ω_{GW,Cosmo} \approx 8 \times 10^{-13} $可以检测到LISA与我们的光谱分离策略。
Detection of the stochastic gravitational wave background with the space-borne gravitational-wave detector network
MOE Key Laboratory of TianQin Mission, TianQin Research Center for Gravitational Physics & School of Physics and Astronomy, Frontiers Science Center for TianQin, Gravitational Wave Research Center of CNSA, Sun Yat-sen University (Zhuhai Campus)(中山大学(珠海校区)天琴任务教育部重点实验室、天琴引力物理研究中心、天琴前沿科学中心、国家航天局引力波研究中心、物理与天文学院)
Time-Averaged Template for Stochastic Gravitational-Wave Background Detection in Space-Based Interferometers
School of Astronomy and Space Science, University of Chinese Academy of Sciences(中国科学院大学天文与空间科学学院);School of Fundamental Physics and Mathematical Sciences, Hangzhou Institute for Advanced Study, UCAS(杭州高等研究院基础物理与数学学院);International Center for Theoretical Physics Asia-Pacific(亚太理论物理中心)
Implications of the LISA stochastic signal from eccentric stellar mass black hole binaries in vacuum
Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences(中国科学院紫金山天文台暗物质与空间天文重点实验室);School of Astronomy and Space Sciences, University of Science and Technology of China(中国科学技术大学天文与空间科学学院);SISSA(的里雅斯特国际高等研究学院);INFN Sezione di Trieste(意大利国家核物理研究所的里雅斯特分部);IFPU - Institute for Fundamental Physics of the Universe(宇宙基础物理研究所);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));Dipartimento di Fisica “G. Occhialini”, Università degli Studi di Milano-Bicocca(米兰比可卡大学 G. Occhialini 物理系);INFN, Sezione di Milano-Bicocca(意大利国家核物理研究所米兰比可卡分部);Institute for Gravitational Wave Astronomy & School of Physics and Astronomy, University of Birmingham(伯明翰大学引力波天文学研究所及物理与天文学学院)
研究探讨了恒星级质量黑洞双星早期 inspiral 中的非圆轨道对随机引力波背景的影响,提出改进的 SGWB 模型并分析其对 LISA 检测的启示。
Muffled Murmurs: Environmental effects in the LISA stochastic signal from stellar-mass black hole binaries
Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences(中国科学院紫金山天文台暗物质与空间天文重点实验室);School of Astronomy and Space Sciences, University of Science and Technology of China(中国科学技术大学天文与空间科学学院);IFPU - Institute for Fundamental Physics of the Universe(宇宙基础物理研究所 (IFPU));Como Lake Centre for AstroPhysics (CLAP), DiSAT, Università dell'Insubria(因苏布里亚大学 DISAT 系科莫湖天体物理中心 (CLAP))
Effect of noise characterization on the detection of mHz stochastic gravitational waves
Aristotle University of Thessaloniki(萨洛尼卡亚里士多德大学);National Observatory of Athens(雅典国家天文台);Université Paris Cité(巴黎西岱大学);CNRS, Astroparticule et Cosmologie(法国国家科学研究中心,粒子天体物理与宇宙学);CEA, Université Paris-Saclay(法国原子能与替代能源委员会,巴黎萨克雷大学);Delft University of Technology(代尔夫特理工大学)
Detection and characterization of instrumental transients in LISA Pathfinder and their projection to LISA
NASA Goddard Space Flight Center(美国宇航局戈达德太空飞行中心);IRFU, CEA, Université Paris-Saclay(法国原子能与替代能源研究所,法国原子能委员会,巴黎萨克雷大学);ARTEMIS, Observatoire de la Côte d’Azur(阿尔特米斯计划,蔚蓝海岸天文台);SYRTE, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, LNE(时间-频率和光学生物物理实验室,巴黎天文台,巴黎文理研究大学,法国国家科学研究中心,索邦大学,法国计量院);Department of Physics, University of Trento(特伦托大学物理系);Department of Physics, Aristotle University of Thessaloniki(塞萨洛尼基亚里士多德大学物理系);Jet Propulsion Laboratory, California Institute of Technology(加州理工学院喷气推进实验室)
Impact of Correlated Test-Mass Noise on Stochastic Gravitational-Wave Background Searches with Space-Based Interferometers
School of Astronomy and Space Science, University of Chinese Academy of Sciences (UCAS)(中国科学院大学天文与空间科学学院);School of Fundamental Physics and Mathematical Sciences, Hangzhou Institute for Advanced Study, UCAS(杭州高等研究院基础物理与数学学院);International Center for Theoretical Physics Asia-Pacific(亚太理论物理中心)
Distinguishing a stochastic gravitational-wave signal from correlated noise with joint parameter estimation: Fisher analysis for ground-based detectors