Pre-supernova Alert System for Super-Kamiokande



Machado, LN, Abe, K, Hayato, Y, Hiraide, K, Ieki, K, Ikeda, M, Kameda, J, Kanemura, Y, Kaneshima, R, Kashiwagi, Y
et al (show 214 more authors) (2022) Pre-supernova Alert System for Super-Kamiokande. ASTROPHYSICAL JOURNAL, 935 (1). p. 40.

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Abstract

<jats:title>Abstract</jats:title> <jats:p>In 2020, the Super-Kamiokande (SK) experiment moved to a new stage (SK-Gd) in which gadolinium (Gd) sulfate octahydrate was added to the water in the detector, enhancing the efficiency to detect thermal neutrons and consequently improving the sensitivity to low energy electron anti-neutrinos from inverse beta decay (IBD) interactions. SK-Gd has the potential to provide early alerts of incipient core-collapse supernovae through detection of electron anti-neutrinos from thermal and nuclear processes responsible for the cooling of massive stars before the gravitational collapse of their cores. These pre-supernova neutrinos emitted during the silicon burning phase can exceed the energy threshold for IBD reactions. We present the sensitivity of SK-Gd to pre-supernova stars and the techniques used for the development of a pre-supernova alarm based on the detection of these neutrinos in SK, as well as prospects for future SK-Gd phases with higher concentrations of Gd. For the current SK-Gd phase, high-confidence alerts for Betelgeuse could be issued up to 9 hr in advance of the core collapse itself.</jats:p>

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 21 Oct 2022 08:38
Last Modified: 18 Jan 2023 19:49
DOI: 10.3847/1538-4357/ac7f9c
Open Access URL: https://iopscience.iop.org/article/10.3847/1538-43...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3165679