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Title: Active–Sterile Neutrino Oscillations in Neutrino-driven Winds: Implications for Nucleosynthesis

Abstract

A protoneutron star produced in a core-collapse supernova (CCSN) drives a wind by its intense neutrino emission. We implement active–sterile neutrino oscillations in a steady-state model of this neutrino-driven wind to study their effects on the dynamics and nucleosynthesis of the wind in a self-consistent manner. Using vacuum mixing parameters indicated by some experiments for a sterile νs of ~1 eV in mass, we observe interesting features of oscillations due to various feedback. For the higher νs mass values, we find that oscillations can reduce the mass-loss rate and the wind velocity by a factor of ~1.6–2.7 and change the electron fraction critical to nucleosynthesis by a significant to large amount. In the most dramatic cases, oscillations shift nucleosynthesis from dominant production of 45Sc to that of 86Kr and 90Zr during the early epochs of the CCSN evolution.

Authors:
ORCiD logo [1];  [2]; ORCiD logo [3]
  1. Univ. of Minnesota, Minneapolis, MN (United States)
  2. Academia Sinica, Taipei (Taiwan)
  3. Univ. of Minnesota, Minneapolis, MN (United States); Tsung-Dao Lee Inst., Shanghai (China)
Publication Date:
Research Org.:
Univ. of Minnesota, Minneapolis, MN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1610094
Grant/Contract Number:  
FG02-87ER40328
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
Journal Name: The Astrophysical Journal (Online); Journal Volume: 880; Journal Issue: 2; Journal ID: ISSN 1538-4357
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Astronomy & Astrophysics; neutrinos – nuclear reactions; nucleosynthesis; abundances – stars: mass-loss – stars: neutron – supernovae: general

Citation Formats

Xiong, Zewei, Wu, Meng-Ru, and Qian, Yong-Zhong. Active–Sterile Neutrino Oscillations in Neutrino-driven Winds: Implications for Nucleosynthesis. United States: N. p., 2019. Web. https://doi.org/10.3847/1538-4357/ab2870.
Xiong, Zewei, Wu, Meng-Ru, & Qian, Yong-Zhong. Active–Sterile Neutrino Oscillations in Neutrino-driven Winds: Implications for Nucleosynthesis. United States. https://doi.org/10.3847/1538-4357/ab2870
Xiong, Zewei, Wu, Meng-Ru, and Qian, Yong-Zhong. Mon . "Active–Sterile Neutrino Oscillations in Neutrino-driven Winds: Implications for Nucleosynthesis". United States. https://doi.org/10.3847/1538-4357/ab2870. https://www.osti.gov/servlets/purl/1610094.
@article{osti_1610094,
title = {Active–Sterile Neutrino Oscillations in Neutrino-driven Winds: Implications for Nucleosynthesis},
author = {Xiong, Zewei and Wu, Meng-Ru and Qian, Yong-Zhong},
abstractNote = {A protoneutron star produced in a core-collapse supernova (CCSN) drives a wind by its intense neutrino emission. We implement active–sterile neutrino oscillations in a steady-state model of this neutrino-driven wind to study their effects on the dynamics and nucleosynthesis of the wind in a self-consistent manner. Using vacuum mixing parameters indicated by some experiments for a sterile νs of ~1 eV in mass, we observe interesting features of oscillations due to various feedback. For the higher νs mass values, we find that oscillations can reduce the mass-loss rate and the wind velocity by a factor of ~1.6–2.7 and change the electron fraction critical to nucleosynthesis by a significant to large amount. In the most dramatic cases, oscillations shift nucleosynthesis from dominant production of 45Sc to that of 86Kr and 90Zr during the early epochs of the CCSN evolution.},
doi = {10.3847/1538-4357/ab2870},
journal = {The Astrophysical Journal (Online)},
number = 2,
volume = 880,
place = {United States},
year = {2019},
month = {7}
}

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Figures / Tables:

Table 1 Table 1: Cases of Active–Sterile Neutrino Oscillations

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