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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Probing nonlinear electrodynamics in slowly rotating spacetimes through neutrino astrophysics

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Autor(es):
Mosquera Cuesta, Herman J. ; Lambiase, Gaetano ; Pereira, Jonas P.
Número total de Autores: 3
Tipo de documento: Artigo Científico
Fonte: Physical Review D; v. 95, n. 2 JAN 17 2017.
Citações Web of Science: 5
Resumo

Huge electromagnetic fields are known to be present during the late stages of the dynamics of supernovae. Thus, when dealing with electrodynamics in this context, the possibility may arise to probe nonlinear theories (generalizations of the Maxwellian electromagnetism). We firstly solve Einstein field equations minimally coupled to an arbitrary (current-free) nonlinear Lagrangian of electrodynamics (NLED) in the slow rotation regime a << M (black hole's mass), up to first order in a/M. We then make use of the robust and self-contained Born-Infeld Lagrangian in order to compare and contrast the physical properties of such NLED spacetime with its Maxwellian counterpart (a slowly rotating Kerr-Newman spacetime), especially focusing on the astrophysics of both neutrino flavor oscillations (nu(e) -> nu(mu),nu(tau)) and spin-flip (nu(l) -> nu(r), ``l{''} stands for ``left{''} and ``r{''} stands for ``right{''}, change of neutrino handedness) mass level crossings, the equivalent to gyroscopic precessions. Such analysis proves that in the spacetime of a slowly rotating nonlinear charged black hole (RNCBH), intrinsically associated with the assumption the electromagnetism is nonlinear, the neutrino dynamics in core-collapse supernovae could be significantly changed. In such an astrophysical environment, a positive enhancement (reduction of the electron fraction Y-e < 0.5) of the r-process may take place. Consequently, it might result in hyperluminous supernova explosions due to enlargement, in atomic number and amount, of the decaying nuclides. Finally, we envisage some physical scenarios that may lead to short-lived charged black holes with high charge-to-mass ratios (associated with unstable highly magnetized neutron stars) and ways to possibly disentangle theories of the electromagnetism from other black hole observables (by means of light polarization measurements). (AU)

Processo FAPESP: 15/04174-9 - Algumas consequências da microfísica de volumes e superfícies em sistemas compactos
Beneficiário:Jonas Pedro Pereira
Linha de fomento: Bolsas no Brasil - Pós-Doutorado