Chiral plasma instability and inverse cascade from nonequilibrium left-handed neutrinos in core-collapse supernovae
| Autor: | Jin Matsumoto, Naoki Yamamoto, Di-Lun Yang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
High Energy Astrophysical Phenomena (astro-ph.HE)
Nuclear Theory (nucl-th) High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Nuclear Theory Astrophysics::High Energy Astrophysical Phenomena High Energy Physics::Phenomenology FOS: Physical sciences Astrophysics - High Energy Astrophysical Phenomena |
| Popis: | We show that the backreaction of left-handed neutrinos out of equilibrium on the matter sector induces an electric current proportional to a magnetic field even without a chiral imbalance for electrons in core-collapse supernovae. We derive the transport coefficient of this effect based on the recently formulated chiral radiation transport theory for neutrinos. This chiral electric current generates a strong magnetic field via the so-called chiral plasma instability, which could provide a new mechanism for the strong and stable magnetic field of magnetars. We also numerically study the physical origin of the inverse cascade of the magnetic energy in the magnetohydrodynamics including this current. Our results indicate that incorporating the chiral effects of neutrinos would drastically modify the hydrodynamic evolutions of supernovae, which may also be relevant to the explosion dynamics. 8 pages, 6 figures; v2: added figure 2 on the time evolution of magnetic helicity, minor revisions, published version |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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