Sky location of massive black hole binaries in the foreground of Galactic white dwarf binaries  

作　　者：Pan Guo Hong-Bo Jin Cong-Feng Qiao Yue-Liang Wu 

机构地区：[1]The International Centre for Theoretical Physics Asia-Pacific,University of Chinese Academy of Sciences,Beijing 100190,China [2]Institute for Frontiers in Astronomy and Astrophysics,Beijing Normal University,Beijing 102206,China [3]National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China [4]The School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [5]Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100190,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2025年第1期93-104,共12页中国科学:物理学、力学、天文学(英文版)

基　　金：supported by the Fundamental Research Funds for the Central Universities,the National Key Research and Development Program of China(Grant No.2020YFC2201500);the National Natural Science Foundation of China(Grant Nos.12147103,11821505,11975236,and 12235008);the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB23030100)。

摘　　要：For space-based gravitational wave(GW)detection,the main noise source for massive black hole binaries(MBHBs)is attributed to approximately 107 double white dwarf binaries in the foreground.For a GW source,the amplitude of the detector response,recorded by a space-based gravitational wave detector,exhibits a modulation effect with a year period when observing the source from various orbital positions.Under the adverse conditions mentioned above,where there is a strong foreground noise and annual modulation in the signals,we employed the wavelet transform and the strong-amplitude relevant orbital position search methods,which allows the weak MBHB sources to achieve higher locating accuracy.In detail,for two MBHB sources of lower intensity,the precision of luminosity distance,represented by the ratioΔD_(L)/D_(L) at the 95%confidence level,is enhanced by factors of∼2.The angular resolutions,denoted byΔΩs,are enhanced by a factor of∼20.These improvements increase the number of detectable GW sources,facilitate multi-messenger follow-up observations and provide constraints on the cosmological constant.

关 键 词：space-based gravitational wave detection gravitational waves massive black hole binaries 

分 类 号：P15[天文地球—天文学]