Combined pre-supernova alert system with KamLAND and Super-Kamiokande
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
Preceding a core-collapse supernova (CCSN), 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 (SK) via inverse beta decay interactions. Once these pre-supernova (pre-SN) neutrinos are observed, an early warning of the upcoming CCSN can be provided. In light of this, KamLAND and SK, both located in the Kamioka mine in Japan, have been monitoring pre-SN neutrinos since 2015 and 2021, respectively. Recently, we performed a joint study between KamLAND and SK on pre-SN neutrino detection. A pre-SN alert system combining the KamLAND detector and the SK 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-SN neutrino signal from a 15 M⊙ 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 hr in advance.
Date Issued
2024-10-01
Date Acceptance
2024-07-02
Citation
The Astrophysical Journal: an international review of astronomy and astronomical physics, 2024, 973 (2)
ISSN
0004-637X
Publisher
IOP Publishing
Journal / Book Title
The Astrophysical Journal: an international review of astronomy and astronomical physics
Volume
973
Issue
2
Copyright Statement
© 2024. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
License URL
Identifier
https://iopscience.iop.org/article/10.3847/1538-4357/ad5fee
Subjects
ANTINEUTRINOS
Astronomy & Astrophysics
BETELGEUSE
COINCIDENCE
DISTANCE
EVOLUTION
GADOLINIUM
MASSIVE STARS
NEUTRINO BURST
Physical Sciences
Science & Technology
SEARCH
SENSITIVITY
Publication Status
Published
Article Number
140
Date Publish Online
2024-09-26