E-viri
Recenzirano
Odprti dostop
-
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, B. E.; Fujikawa, B. K.; Learned, J. G.; Maricic, J.; Axani, S. N.; Winslow, L. A.; Fu, Z.; Smolsky, J.; Efremenko, Y.; Karwowski, H. J.; Markoff, D. M.; Tornow, W.; Li, A.; Detwiler, J. A.; Enomoto, S.; Decowski, M. P.; Grant, C.; Song, H.; O’Donnell, T.; Dell’Oro, S.
The Astrophysical journal, 07/2022, Letnik: 934, Številka: 1Journal Article
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 <(17.5–22.7) M ⊙ yr −1 with a 90% confidence level.
