Space gravitational-wave antennas DECIGO and B-DECIGO

• DOI: 10.1142/s0218271818450013
• Publication Date: 2018-05-07T09:44:21Z
• Authors: Seiji Kawamura; Takashi Nakamura; Masaki Ando; Naoki Seto; Tomotada Akutsu; Ikkoh Funaki; Kunihito Ioka; Nobuyuki Kanda; Isao Kawano; Mitsuru Musha; Kazuhiro Nakazawa; Shuichi Sato; Takeshi Takashima; Takahiro Tanaka; Kimio Tsubono; Jun'ichi Yokoyama; Kazuhiro Agatsuma; Koh-suke Aoyanagi; Koji Arai; Akito Araya; Naoki Aritomi; Hideki Asada; Yoichi Aso; Dan Chen; Takeshi Chiba; Toshikazu Ebisuzaki; Satoshi Eguchi; Yumiko Ejiri; Motohiro Enoki; Yoshiharu Eriguchi; Masa-Katsu Fujimoto; Ryuichi Fujita; Mitsuhiro Fukushima; Toshifumi Futamase; Rina Gondo; Tomohiro Harada; Tatsuaki Hashimoto; Kazuhiro Hayama; Wataru Hikida; Yoshiaki Himemoto; Hisashi Hirabayashi; Takashi Hiramatsu; Feng-Lei Hong; Hideyuki Horisawa; Mizuhiko Hosokawa; Kiyotomo Ichiki; Takeshi Ikegami; Kaiki T. Inoue; Hideki Ishihara; Takehiko Ishikawa; Hideharu Ishizaki; Hiroyuki Ito; Yousuke Itoh; Kiwamu Izumi; Shinya Kanemura; Nobuki Kawashima; Fumiko Kawazoe; Naoko Kishimoto; Kenta Kiuchi; Shiho Kobayashi; Kazunori Kohri; Hiroyuki Koizumi; Yasufumi Kojima; Keiko Kokeyama; Wataru Kokuyama; Kei Kotake; Yoshihide Kozai; Hiroo Kunimori; Hitoshi Kuninaka; Kazuaki Kuroda; Sachiko Kuroyanagi; Kei-ichi Maeda; Hideo Matsuhara; Nobuyuki Matsumoto; Yuta Michimura; Osamu Miyakawa; Umpei Miyamoto; Shinji Miyoki; Mutsuko Y. Morimoto; Toshiyuki Morisawa; Shigenori Moriwaki; Shinji Mukohyama; Shigeo Nagano; Kouji Nakamura; Hiroyuki Nakano; Kenichi Nakao; Shinichi Nakasuka; Yoshinori Nakayama; Erina Nishida; Atsushi Nishizawa; Yoshito Niwa; Taiga Noumi; Yoshiyuki Obuchi; Naoko Ohishi; Masashi Ohkawa; Kenshi Okada; Norio Okada; Koki Okutomi; Kenichi Oohara; Norichika Sago; Motoyuki Saijo; Ryo Saito; Masaaki Sakagami; Shin-ichiro Sakai; Shihori Sakata; Misao Sasaki; Takashi Sato; Masaru Shibata; Kazunori Shibata; Ayumi Shimo-oku; Hisaaki Shinkai; Ayaka Shoda; Kentaro Somiya; Hajime Sotani; Aru Suemasa; Naoshi Sugiyama; Yudai Suwa; Rieko Suzuki; Hideyuki Tagoshi; Fuminobu Takahashi; Kakeru Takahashi; Keitaro Takahashi; Ryutaro Takahashi; Ryuichi Takahashi; Hirotaka Takahashi; Takamori Akiteru; Tadashi Takano; Nobuyuki Tanaka; Keisuke Taniguchi; Atsushi Taruya; Hiroyuki Tashiro; Yasuo Torii; Morio Toyoshima; Shinji Tsujikawa; Akitoshi Ueda; Ken-ichi Ueda; Takafumi Ushiba; Masayoshi Utashima; Yaka Wakabayashi; Kent Yagi; Kazuhiro Yamamoto; Toshitaka Yamazaki; Chul-Moon Yoo; Shijun Yoshida; Taizoh Yoshino
• Keywords: Fabry–Perot Michelson interferometer; Gravitational-wave; 0103 physical sciences; inflation; multimessenger astronomy; 530; 7. Clean energy; 01 natural sciences

DECi-hertz Interferometer Gravitational-wave Observatory (DECIGO) is a future Japanese space gravitational-wave antenna. The most important objective of DECIGO, among various sciences to be aimed at, is to detect gravitational waves coming from the inflation of the universe. DECIGO consists of four clusters of spacecraft, and each cluster consists of three spacecraft with three Fabry–Perot Michelson interferometers. As a pathfinder mission of DECIGO, B-DECIGO will be launched, hopefully in the 2020s, to demonstrate technologies necessary for DECIGO as well as to lead to fruitful multimessenger astronomy. B-DECIGO is a small-scale or simpler version of DECIGO with the sensitivity slightly worse than that of DECIGO, yet good enough to provide frequent detection of gravitational waves.