Current status of space gravitational wave antenna DECIGO and B-DECIGO
Current status of space gravitational wave antenna DECIGO and B-DECIGO
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DOI：
10.1093/ptep/ptab019
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发表时间：
2021-02-22
影响因子：
3.5
通讯作者：
Zhu, Zong-Hong
中科院分区：
文献类型：
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作者：
Kawamura, Seiji;Ando, Masaki;Zhu, Zong-Hong
分赫兹干涉仪引力波观测台（DECIGO）是日本未来的一项空间使命，频带为0.1赫兹至10赫兹。DECIGO旨在探测原始引力波，这种引力波可能是在宇宙诞生后的暴胀时期产生的。DECIGO还有许多其他科学目标，包括直接测量宇宙膨胀的加速度，以及可靠和准确地预测中子星星/黑洞双星合并的时间和位置。DECIGO由置于日心轨道上的四组观测台组成。每个集群由三个航天器组成，构成三个臂长1000公里的法布里-珀罗迈克尔逊干涉仪。三个DECIGO星团将被放置在彼此远离的地方，第四个将被放置在与其他三个星团中的一个相同的位置，以获得用于探测原始引力波的相关信号。我们计划在2030年代的DECIGO之前发射B-DECIGO，这是DECIGO的科学探路者，以展示DECIGO所需的技术，并获得丰硕的科学成果，以进一步扩展多信使天文学。
The Deci-hertz Interferometer Gravitational Wave Observatory (DECIGO) is a future Japanese space mission with a frequency band of 0.1 Hz to 10 Hz. DECIGO aims at the detection of primordial gravitational waves, which could have been produced during the inflationary period right after the birth of the Universe. There are many other scientific objectives of DECIGO, including the direct measurement of the acceleration of the expansion of the Universe, and reliable and accurate predictions of the timing and locations of neutron star/black hole binary coalescences. DECIGO consists of four clusters of observatories placed in heliocentric orbit. Each cluster consists of three spacecraft, which form three Fabry-Perot Michelson interferometers with an arm length of 1000 km. Three DECIGO clusters will be placed far from each other, and the fourth will be placed in the same position as one of the other three to obtain correlation signals for the detection of primordial gravitational waves. We plan to launch B-DECIGO, which is a scientific pathfinder for DECIGO, before DECIGO in the 2030s to demonstrate the technologies required for DECIGO, as well as to obtain fruitful scientific results to further expand multi-messenger astronomy.