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30 May 2022 to 4 June 2022
Virtual Seoul
Asia/Seoul timezone

MeV Neutrinos from Astrophysical Sources

Not scheduled
5m
Virtual Seoul

Virtual Seoul

Poster Astrophysical neutrinos Poster

Speaker

Kyujin Kwak (Ulsan National Institute of Science and Technology)

Description

Many astrophysical sources can emit neutrinos in the energy below a few to several MeVs. Detecting such neutrinos will provide us with valuable information on the physical processes that govern their evolution and structure. So far, neutrinos only from the Sun and a single event of supernova (SN 1987A) have been observed. However, as the size of neutrino observatories keep increasing and the detector technology keep improving, astrophysical neutrinos, other than from the Sun and nearby supernovae including oxygen or silicon burning stars near supernovae, will be eventually observable, opening the era of the neutrino astronomy. In this work, we search for possibilities to observe astrophysical neutrinos from various sources, but we focus more on red supergiant (RSG) stars as our primary candidate, which are expected to emit the amount of neutrinos much larger than the Sun. We calculated neutrino luminosities along the evolutionary tracks of massive stars of 15 - 25 $M_{sun}$ with metallicity 0.01 – 1 $Z_{sun}$, using MESA, a publicly available stellar evolution code. We then calculated the energy spectra of neutrinos emitted through various production processes. We present the fluxes of such neutrinos from nearby RSGs on the Earth, and discuss the prospect of detecting them in current and future neutrino observatories.

Collaboration Hyper-Kamiokande

Primary author

Kyujin Kwak (Ulsan National Institute of Science and Technology)

Co-authors

Mr Gwangeon Seong (Ulsan National Institute of Science and Technology) Dr Bok-Kyun Shin (Ulsan National Institute of Science and Technology) Mr Chang Hee Son (Ulsan National Institute of Science and Technology) Prof. Dongsu Ryu (Ulsan National Institute of Science and Technology)

Presentation Materials