Cosmophysics Seminar (Mr. Hirokazu Sasaki)

CategoryCosmophysics Seminar
Start2019/02/07(木)15:30
End2019/02/07(木)16:30
VenueKenkyu-Honkan 3F, Seminar Room
TitleNeutrino oscillations in core-collapse supernovae and their effects on nucleosynthesis
SpeakerMr. Hirokazu Sasaki (The University of Tokyo)
Language英語/English
Contactteradat-AT-post.kek.jp
Website
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Abstract

Neutrinos are produced inside astrophysical sites such as the Sun, core-collapse supernovae, blazars and neutron-star mergers. Such neutrinos would change their flavors significantly owing to refractive effects of background electrons and neutrinos themselves. In core-collapse supernovae, large numbers of neutrinos are produced and emitted from the proto-neutron star after core-bounce. It is considered that collective neutrino oscillations are caused by self-interacting neutrinos near the proto-neutron star (~100 km). Such refractive effect increases energetic (anti)electron neutrinos, which is expected to affect supernova explosion and nucleosynthesis. We show a numerical result of neutrino oscillations in core-collapse supernovae and mention how collective neutrino oscillations enhance nucleosynthesis in neutrino-driven winds. Our result would be helpful to more realistic studies to reveal the origin of solar-system isotopic abundances of p-nuclei.

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