arXiv · 2404.09920
Combined Pre-Supernova Alert System with Kamland and Super-Kamiokande
Abstract
Preceding a core-collapse supernova, various processes produce an increasing amount of neutrinos of all flavors characterized by mounting energies from the interior of massive stars. Among them, the electron antineutrinos are potentially detectable by terrestrial neutrino experiments such as KamLAND and Super-Kamiokande via inverse beta decay interactions. Once these pre-supernova neutrinos are observed, an early warning of the upcoming core-collapse supernova can be provided. In light of this, KamLAND and Super-Kamiokande, both located in the Kamioka mine in Japan, have been monitoring pre-supernova neutrinos since 2015 and 2021, respectively. Recently, we performed a joint study between KamLAND and Super-Kamiokande on pre-supernova neutrino detection. A pre-supernova alert system combining the KamLAND detector and the Super-Kamiokande detector was developed and put into operation, which can provide a supernova alert to the astrophysics community. Fully leveraging the complementary properties of these two detectors, the combined alert is expected to resolve a pre-supernova neutrino signal from a 15 M$_{\odot}$ star within 510 pc of the Earth, at a significance level corresponding to a false alarm rate of no more than 1 per century. For a Betelgeuse-like model with optimistic parameters, it can provide early warnings up to 12 hours in advance.
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KamLAND, Super-Kamiokande Collaborations, :, Seisho Abe, Minori Eizuka, Sawako Futagi, Azusa Gando, Yoshihito Gando, Shun Goto, Takahiko Hachiya, Kazumi Hata, Koichi Ichimura, Sei Ieki, Haruo Ikeda, Kunio Inoue, Koji Ishidoshiro, Yuto Kamei, Nanami Kawada, Yasuhiro Kishimoto, Masayuki Koga, Maho Kurasawa, Tadao Mitsui, Haruhiko Miyake, Daisuke Morita, Takeshi Nakahata, Rika Nakajima, Kengo Nakamura, Rikuo Nakamura, Ryo Nakamura, Jun Nakane, Hideyoshi Ozaki, Keita Saito, Taichi Sakai, Itaru Shimizu, Junpei Shirai, Kensuke Shiraishi, Ryunosuke Shoji, Atsuto Suzuki, Atsuto Takeuchi, Kyoko Tamae, Hiroko Watanabe, Kazuho Watanabe, Sei Yoshida, Saori Umehara, Ken-Ichi Fushimi, Kenta Kotera, Yusuke Urano, Bruce E. Berger, Brian K. Fujikawa, John G. Larned, Jelena Maricic, Zhenghao Fu, Joseph Smolsky, Lindley A. Winslow, Yuri Efremenko, Hugon J. Karwowski, Diane M. Markoff, Werner Tornow, Stefano Dell'Oro, Thomas O'Donnell, Jason A. Detwiler, Sanshiro Enomoto, Michal P. Decowski, Kelly M. Weerman, Christopher Grant, Hasung Song, Aobo Li, Spencer N. Axani, Miles Garcia, Ko Abe, Christophe Bronner, Yoshinari Hayato, Katsuki Hiraide, Keishi Hosokawa, Kei Ieki, Motoyasu Ikeda, June Kameda, Yuki Kanemura, Ryota Kaneshima, Yuri Kashiwagi, Yousuke Kataoka, Shintaro Miki, Shunichi Mine, Makoto Miura, Shigetaka Moriyama, Masayuki Nakahata, Yuuki Nakano, Shoei Nakayama, Yohei Noguchi, Kazufumi Sato, Hiroyuki Sekiya, Hayato Shiba, Kotaro Shimizu, Masato Shiozawa, Yutaro Sonoda, Yoichiro Suzuki, Atsushi Takeda, Yasuhiro Takemoto, Hidekazu K. Tanaka, Takatomi Yano. 2024-04-15. Combined Pre-Supernova Alert System with Kamland and Super-Kamiokande. https://doi.org/10.3847/1538-4357%2Fad5fee
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