Speaker
Ms
Chinami Kato
(Tohoku univeristy)
Description
Pre-supernova (pre-SN) neutrinos are emitted from a core of massive stars, which are supposed to be progenitors of core-collapse supernovae (CCSNe). Although it was seemed to be difficult to detect pre-SN neutrinos because of their low energy, detection of pre-SN neutrinos comes into view owing to the recent development of detectors. We believe that future detection of pre-SN neutrinos will give us a big impact as much as the historical neutrino events at SN1987A. In this talk, we focus on the importance of pre-SN neutrino detection in two points of view: evidence for the theory of stellar evolution and SN alarm.
In the former, we show the luminosities and spectra of neutrinos for two types of progenitors: FeCCSN- and ECSN-progenitors, and discuss their distinguishability from observations in all flavor. In the latter, we describe the predictions of SN alarms at current and planned neutrino detectors based on the time profiles of pre-SN neutrinos. This is closely related with multi-messenger studies and the SNEWS project, in which a prompt alert of the occurrence of SN event at our Galaxy is provided for the astronomical community. We also mention a relation between pre-SN neutrinos and SN alarm.
Primary author
Ms
Chinami Kato
(Tohoku univeristy)
Co-authors
Prof.
Hideyuki Umeda
(University of Tokyo)
Dr
Hiroki Nagakura
(Princeton university)
Dr
Koh Takahashi
(Max Planck Institute)
Dr
Koji Ishidoshiro
(Tohoku university)
Prof.
Shoichi Yamada
(Waseda university)
Dr
Shun Furusawa
(Tokyo university of science)
Dr
Takashi Yoshida
(University of Tokyo)
