Braking indices of pulsars obtained in the presence of an effective force

Braking indices of pulsars obtained in the presence of an effective force

Author Magalhães, Nadja Simão Autor UNIFESP Google Scholar
Okada, Anderson Seiji Autor UNIFESP Google Scholar
Frajuca, Carlos Google Scholar
Abstract Braking indices of pulsars present a scientific challenge as their theoretical calculation is still an open problem. In this paper, we report results of a study regarding such calculation which adapts the canonical model (which admits that pulsars are rotating magnetic dipoles) basically by introducing a compensating component in the energy conservation equation of the system. This component would correspond to an effective force that varies with the first power of the tangential velocity of the pulsar's crust. We test the proposed model using data available and predict braking indices values for different stars. We comment on the high braking index recently measured of the pulsar J1640-4631.
Keywords stars: fundamental parameters
stars: magnetic field
stars: massive
pulsars: general
pulsars: individual: PSR B0531+21, PSR B1509-58, PSR B0540-69, PSR B0833-45, PSR J1119-6127, PSR J1846-0258, PSR J1640-4631
xmlui.dri2xhtml.METS-1.0.item-coverage Oxford
Language English
Sponsor Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
National Institute of Science and Technology in Astrophysics (INCT-A, Brazil)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Grant number CNPq: 309295/2009-2
CNPq: 149107/2010-2
CNPq: 312906/2013-7
FAPESP: 13/26258-4
Date 2016
Published in Monthly Notices Of The Royal Astronomical Society. Oxford, v. 461, n. 4, p. 3993-3996, 2016.
ISSN 0035-8711 (Sherpa/Romeo, impact factor)
Publisher Oxford Univ Press
Extent 3993-3996
Origin http://dx.doi.org/10.1093/mnras/stw1636
Access rights Closed access
Type Article
Web of Science ID WOS:000383514900049
URI https://repositorio.unifesp.br/handle/11600/57037

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