Active-Sterile Neutrino Oscillations in Neutrino-driven Winds: Implications for Nucleosynthesis
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-con...
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| Veröffentlicht in: | The Astrophysical journal 2019-08, Vol.880 (2), p.81 |
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| creator | Xiong, Zewei Wu, Meng-Ru Qian, Yong-Zhong |
| description | 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 s of ∼1 eV in mass, we observe interesting features of oscillations due to various feedback. For the higher s 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_str_mv | 10.3847/1538-4357/ab2870 |
| format | Article |
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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 s of ∼1 eV in mass, we observe interesting features of oscillations due to various feedback. For the higher s 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. 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| subjects | abundances – stars: mass-loss – stars: neutron – supernovae: general Astronomy & Astrophysics ASTRONOMY AND ASTROPHYSICS Astrophysics Neutrinos neutrinos – nuclear reactions Nuclear fusion nuclear reactions, nucleosynthesis, abundances nucleosynthesis Oscillations stars: mass-loss stars: neutron Steady state models Stellar winds Supernova supernovae: general Wind Wind effects Wind speed Wind velocities Zirconium isotopes |
| title | Active-Sterile Neutrino Oscillations in Neutrino-driven Winds: Implications for Nucleosynthesis |
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