On detecting stellar binary black holes via the LISA-Taiji network  

作　　者：Ju Chen Chang-Shuo Yan You-Jun Lu Yue-Tong Zhao Jun-Qiang Ge 陈举;闫昌硕;陆由俊;赵悦同;葛均强(National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China [2]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Research in Astronomy and Astrophysics》2021年第11期139-147,共9页天文和天体物理学研究（英文版）

基　　金：partly supported by the National Key R&D Program of China (Grant Nos. 2020YFC2201400, 2020SKA0120102, and 2016YFA0400704);the National Natural Science Foundation of China (Grant Nos. 11690024, 11873056, and 11991052);the Strategic Priority Program of the Chinese Academy of Sciences (Grant No. XDB 23040100);the Beijing Municipal Natural Science Foundation (Grant No. 1204038)

摘　　要：The detection of gravitational waves(GWs)by ground-based laser interferometer GW observatories(LIGO/Virgo)reveals a population of stellar binary black holes(sBBHs)with(total)masses up to~150 M⊙,which are potential sources for space-based GW detectors,such as LISA and Taiji.In this paper,we investigate in details on the possibility of detecting sBBHs by the LISA-Taiji network in future.We adopt the sBBH merger rate density constrained by LIGO/VIRGO observations to randomly generate mock sBBHs samples.Assuming an observation period of 4 years,we find that the LISA-Taiji network may detect several tens(or at least several)sBBHs with signal-to-noise ratio(SNR)>8(or>15),a factor 2-3 times larger than that by only using LISA or Taiji observations.Among these sBBHs,no more than a few that can merge during the 4-year observation period.If extending the observation period to 10 years,then the LISA-Taiji network may detect about one hundred(or twenty)sBBHs with SNR>8(or>15),among them about twenty(or at least several)can merge within the observation period.Our results suggest that the LISA-Taiji network may be able to detect at least a handful to twenty or more sBBHs even if assuming a conservative SNR threshold(15)for"detection",which enables multi-band GW observations by space and ground-based GW detectors.We also further estimate the uncertainties in the parameter estimations of the sBBH systems"detected"by the LISA-Taiji network.We find that the relative errors in the luminosity distance measurements and sky localization are mostly in the range of 0.05-0.2 and 1-100 deg2,respectively,for these sBBHs.

关 键 词：gravitational waves instrumentation:interferometers methods:data analysis 

分 类 号：P145.8[天文地球—天体物理]