23–27 Oct 2017
Havana, Cuba
America/Havana timezone

On the effects of magnetic fields and slow rotation in white dwarfs

25 Oct 2017, 13:55
25m
Room "Jose L. Franco"

Room "Jose L. Franco"

Parallel Talk High Energy Physics, Astrophysics and Cosmology (covering Hadron Structure, Phases of Nuclear Matter, QCD, Precision Measurements with Nuclei, Fundamental Interactions and Neutrinos) Parallel Sessions - HEP

Speaker

D. Alvear Terrero (Departamento de Física Teórica, Instituto de Cibernética Matemática y Física, Cuba.)

Description

We use Hartle's formalism to study the effects of rotation in the structure of magnetized white dwarfs within the framework of general relativity. The inner matter is described by means of an equation of state for electrons under the action of a constant magnetic field, which breaks the SO(3) symmetry and introduces a splitting of the pressure into one parallel and other perpendicular to the magnetic field. Solutions correspond to typical densities of white dwarfs and values of magnetic field below 10$^{13}$G, considering perpendicular and parallel pressures independently, as if associated to two different equations of state.
Rotation effects obtained accounts for an increase of the maximum mass for both, magnetized and non-magnetized stable configurations, up to about 1.5 M$_⊙$. Further effects studied include the deformation of the stars, which become oblate spheroids and the solutions for other quantities of interest, such as the moment of inertia, quadrupolar momentum and eccentricity. In all cases, rotation effects are dominant with respect to those of the magnetic field.

Primary authors

D. Alvear Terrero (Departamento de Física Teórica, Instituto de Cibernética Matemática y Física, Cuba.) D. Manreza Paret (Facultad de Física, Universidad de la Habana, Cuba & Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, México.) A. Perez Martinez (Departamento de Física Teórica, Instituto de Cibernética Matemática y Física, Cuba.)

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