White Dwarf Pulsars and Very Massive Compact Ultra Magnetized White Dwarfs

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Otoniel, Edson ; Lobato, R. V. ; Malheiro, M. ; Franzon, Bruno ; Schramm, Stefan ; Weber, Fridolin ; DosSantos, AL ; Vasconcellos, CAZ ; DaSilva, DT ; Hadjimichef, D ; Weber, F ; Machado, MVT ; DaSilva, MLL ; Xu, R ; Greiner, W

• Document type: Journal article
• Source: PROCEEDINGS OF THE 7TH INTERNATIONAL WORKSHOP ON ASTRONOMY AND RELATIVISTIC ASTROPHYSICS (IWARA 2016); v. 45, p. 9-pg., 2017-01-01.

Abstract

In this work, we discuss white dwarf pulsars found recently making also reference of the possibility of some SGRs/AXPs being part of this class of pulsars. We also study the properties of very massive compact ultra magnetized white dwarfs that could be the progenitors candidates of super luminous type Ia supernovae, and also a previous stage of these white dwarf pulsars before the magnetic field decay. The structure of this ultra magnetized white dwarfs is obtained by solving the Einstein -Maxwell equations with a poloidal magnetic field in a fully general relativistic approach. The stellar interior is composed of a regular crystal lattice made of carbon ions immersed in a degenerate relativistic electron gas. We find that magnetized white dwarfs violate the standard Chandrasekhar mass limit significantly. We obtain a maximum white dwarf mass of around 2.12 M-circle dot with an equatorial radius R similar to 1596 Km, a central magnetic field of B-c = 1.74 x 10(14) G and B-s = 3.6 x 1013 G at the stellar surface. (AU)

• FAPESP's process: 13/26258-4 - Superdense matter in the universe
• Grantee: Manuel Máximo Bastos Malheiro de Oliveira
• Support Opportunities: Research Projects - Thematic Grants