Energy source for the magnetic field growth in magnetars driven by the electron-nucleon interaction
| Autor: | Maxim Dvornikov, Victor B. Semikoz |
|---|---|
| Přispěvatelé: | Томский государственный университет Физический факультет Научные подразделения ФФ |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
High Energy Astrophysical Phenomena (astro-ph.HE)
Physics Nuclear and High Energy Physics нейтронные звезды Magnetic energy Neutron magnetic moment FOS: Physical sciences Magnetic reconnection Magnetic field Nuclear physics Neutron star Magnetization High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Magnetic helicity магнитные поля электрон-нуклонные взаимодействия Energy source Astrophysics - High Energy Astrophysical Phenomena |
| Zdroj: | Physical Review D. 2015. Vol. 92, № 8. P. 083007-1-083007-7 |
| Popis: | We study the magnetic field generation in a neutron star within the model based on the magnetic field instability in the nuclear matter owing to the electron-nucleon parity violating interaction. We suggest that the growing magnetic field takes the energy from thermal background fermions in the neutron star matter. The system of kinetic equations for the spectra of the magnetic helicity density and magnetic energy density as well as the chiral imbalance are solved numerically accounting for this energy source. We obtain that, for the initial conditions corresponding to a typical neutron star, the large scale magnetic field $\sim 10^{15}\thinspace\text{G}$ is generated during $(10^4-10^5)\thinspace\text{yr}$. We suggest that the proposed model describes strong magnetic fields observed in magnetars. 7 pages in Revtex4.1, two columns, 8 eps figures; paper was significantly revised, the description of the magnetic helicity evolution is added; matches the version published in Phys.Rev.D |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|