Neutrino-driven Instability of Ion Acoustic Waves in an Ultrarelativistic Degenerate Plasma

The coupling between ion acoustic waves (IAWs) and a neutrino beam undergoing flavor oscillations in a dense, relativistically degenerate plasma is analyzed. The neutrino-driven streaming instability of the IAWs is investigated with relevance to plasma conditions at the last stage of stellar evoluti...

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Bibliographic Details
Published in:The Astrophysical journal 2019-10, Vol.884 (1), p.27
Main Authors: Ghai, Yashika, Saini, N. S., Eliasson, B.
Format: Article
Language:English
Subjects:
Acoustic coupling
Acoustic waves
Astrophysics
Core-collapse supernovae
Degenerate matter
Flavors
Instability
Ion acoustic waves
Neutrino beams
Neutrino oscillations
Neutrinos
Oscillations
Plasma physics
Relativistic fluid dynamics
Resonant frequencies
Stability
Stability analysis
Stellar evolution
Supernova
Supernova neutrinos
Supernovae
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Summary:The coupling between ion acoustic waves (IAWs) and a neutrino beam undergoing flavor oscillations in a dense, relativistically degenerate plasma is analyzed. The neutrino-driven streaming instability of the IAWs is investigated with relevance to plasma conditions at the last stage of stellar evolution in a massive supernova progenitor. The influence of neutrino beam parameters such as the energy of the incident neutrino beam and eigenfrequency of the neutrino flavor oscillations on the instability growth rate is obtained numerically. It is observed that the neutrino flavor oscillations significantly affect the neutrino-driven instability of the IAWs. Our results also indicate that the time period for the onset of the streaming neutrino-driven instability is shorter than the typical time period of a core-collapse supernova explosion. The findings of this investigation may shed new light on the understanding of the underlying physical mechanism responsible for the core-collapse supernova.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/ab3e0c