학술논문
Search for Supernova Neutrinos and Constraint on the Galactic Star Formation Rate with the KamLAND Data
Document Type
article
Author
Abe, S; Asami, S; Eizuka, M; Futagi, S; Gando, A; Gando, Y; Gima, T; Goto, A; Hachiya, T; Hata, K; Hosokawa, K; Ichimura, K; Ieki, S; Ikeda, H; Inoue, K; Ishidoshiro, K; Kamei, Y; Kawada, N; Kishimoto, Y; Koga, M; Kurasawa, M; Maemura, N; Mitsui, T; Miyake, H; Nakahata, T; Nakamura, K; Nakamura, R; Ozaki, H; Sakai, T; Sambonsugi, H; Shimizu, I; Shirai, J; Shiraishi, K; Suzuki, A; Suzuki, Y; Takeuchi, A; Tamae, K; Watanabe, H; Yoshida, Y; Obara, S; Ichikawa, A; Yoshida, S; Umehara, S; Fushimi, K; Kotera, K; Urano, Y; Berger, BE; Fujikawa, BK; Learned, JG; Maricic, J; Axani, SN; Winslow, LA; Fu, Z; Smolsky, J; Efremenko, Y; Karwowski, HJ; Markoff, DM; Tornow, W; Li, A; Detwiler, JA; Enomoto, S; Decowski, MP; Grant, C; Song, H; O’Donnell, T; Dell’Oro, S
Source
The Astrophysical Journal. 934(1)
Subject
Language
Abstract
We present the results of a search for core-collapse supernova neutrinos, using long-term KamLAND data from 2002 March 9 to 2020 April 25. We focus on the electron antineutrinos emitted from supernovae in the energy range of 1.8-111 MeV. Supernovae will make a neutrino event cluster with the duration of ∼10 s in the KamLAND data. We find no neutrino clusters and give the upper limit on the supernova rate to be 0.15 yr−1 with a 90% confidence level. The detectable range, which corresponds to a >95% detection probability, is 40-59 kpc and 65-81 kpc for core-collapse supernovae and failed core-collapse supernovae, respectively. This paper proposes to convert the supernova rate obtained by the neutrino observation to the Galactic star formation rate. Assuming a modified Salpeter-type initial mass function, the upper limit on the Galactic star formation rate is