Space gravitational wave antenna DECIGO and B-DECIGO
Space gravitational wave antenna DECIGO and B-DECIGO
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DOI：
10.1007/s12567-017-0177-1
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发表时间：
2017-11
影响因子：
1.4
通讯作者：
M. Musha;Decigo working group
中科院分区：
文献类型：
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作者：
M. Musha;Decigo working group
由于直接探测引力波将使我们对早期宇宙或恒星的生命有更深入的了解，因此已经研制出应变灵敏度高于10− 22的激光干涉引力波探测器。在日本，已经推进了名为DECi-hertz引力波观测台（DECIGO）的空间引力波探测器项目，该项目由三颗卫星组成，形成等边三角形的法布里-珀罗激光干涉仪，臂长为1000公里。DECIGO的应变灵敏度设计为2 × 10−24/kHz（0.1 Hz附近），其目标是起源于黑洞或中子星星双星的涡卷、合并以及宇宙早期暴胀的引力波，目前还没有地基引力波探测器能够进入这一观测波段。在21世纪30年代发射DECIGO之前，计划进行一项名为B-DECIGO的里程碑式使命，这是DECIGO的缩小使命。B-DECIGO除了对DECIGO进行可行性测试外，还有自己的科学目标。本文综述了DECIGO和B-DECIGO计划。
Since the direct detection of gravitational wave will give us a fruitful insight about the early universe or life of stars, laser interferometric gravitational wave detectors with the strain sensitivity of higher than 10−22have been developed. In Japan, the space gravitational wave detector project named DECi-hertz Gravitational wave Observatory (DECIGO) has been promoted which consists of three satellites forming equilateral triangle-shaped Fabry–Perot laser interferometer with the arm length of 1000 km. The designed strain sensitivity of DECIGO is 2 × 10−24/√Hz around 0.1 Hz whose targets are gravitational waves originated from the inspiral and the merger of black hole or neutron star binaries and from the inflation at the early universe, and no ground-based gravitational wave detector can access this observation band. Before launching DECIGO in 2030s, a milestone mission named B-DECIGO is planned which is a downsized mission of DECIGO. B-DECIGO also has its own scientific targets in addition to the feasibility test for DECIGO. In the present paper, DECIGO and B-DECIGO projects are reviewed.