The LISA-Taiji Network: Precision Localization of Coalescing Massive Black Hole Binaries.

The LISA-Taiji Network: Precision Localization of Coalescing Massive Black Hole Binaries.
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DOI:
10.34133/2021/6014164
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发表时间:
2021
期刊:
Research (Washington, D.C.)
影响因子:
--
通讯作者:
Cai RG
Cai RG
中科院分区:
其他
文献类型:
--
作者:
Ruan WH;Liu C;Guo ZK;Wu YL;Cai RG

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我们探索了一种潜在的LISA-Taiji网络来快速准确地定位合并的大质量黑洞双星。对于红移为1、总质量为105M⊙的等质量双星,LISA-Taiji网络在源定位区域上比单个探测器提高了近4个数量级。通过引力波信号对天空位置的精确测量,可以在最终黑洞合并之前完全识别出具有低红移的宿主星系。这种宿主星系的识别对于双星合并成新黑洞时环双星盘电磁发射的后续变化至关重要,并使合并的大质量黑洞双星成为探索宇宙膨胀历史的标准信号。
We explore a potential LISA-Taiji network to fast and accurately localize the coalescing massive black hole binaries. For an equal-mass binary located at redshift of 1 with a total intrinsic mass of 105M⊙, the LISA-Taiji network may achieve almost four orders of magnitude improvement on the source localization region compared to an individual detector. The precision measurement of sky location from the gravitational-wave signal may completely identify the host galaxy with low redshifts prior to the final black hole merger. Such identification of the host galaxy is vital for the follow-up variability in electromagnetic emissions of the circumbinary disc when the binary merges to a new black hole and enables the coalescing massive black hole binaries to be used as a standard siren to probe the expansion history of the Universe.
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