A Model for the Braking Indices of Pulsars

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dc.citation.volume45
dc.contributor.authorde Oliveira, Heitor O.
dc.contributor.authorMarinho, Rubens M., Jr.
dc.contributor.authorMagalhaes, Nadja S. [UNIFESP]
dc.coverageSingapore
dc.date.accessioned2020-07-17T14:03:31Z
dc.date.available2020-07-17T14:03:31Z
dc.date.issued2017
dc.description.abstractStars known as pulsars are generally modeled as magnetized spheres made of neutrons with high rotation frequency. It is known that such stars are spinning down and this braking is measured by a parameter, n, known as braking index. For the canonical model such parameter should have a single value for all pulsars: n = 3. However, from observations it is known that n diverges from 3. In this work, differently from the canonical model, we have hypothesized the existence of a variation of the moment of inertia of the star through a time-varying radius. Using energy conservation we find the values for the variation of the radius of our pulsar sample. Our results indicate that it may be reasonable to consider that the radius of pulsars can be changing with time.en
dc.description.affiliationITA, Dept Fis, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP, Brazil
dc.description.affiliationUniv Fed Sao Paulo UNIFESP, Dept Fis, Rua Sao Nicolau 210, BR-09913030 Diadema, SP, Brazil
dc.description.affiliationUnifespUniv Fed Sao Paulo UNIFESP, Dept Fis, Rua Sao Nicolau 210, BR-09913030 Diadema, SP, Brazil
dc.description.provenanceMade available in DSpace on 2020-07-17T14:03:31Z (GMT). No. of bitstreams: 0 Previous issue date: 2017en
dc.description.sourceWeb of Science
dc.description.sponsorshipCoordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
dc.description.sponsorshipNational Institute of Science and Technology in Astrophysics (INCT-A, Brazil)
dc.description.sponsorshipNational Institute of Science and Technology in Astrophysics (a joint CNPq project, FAPESP )
dc.description.sponsorshipNational Institute of Science and Technology in Astrophysics (a joint FAPESP project, FAPESP)
dc.description.sponsorshipFAPESP
dc.description.sponsorshipIDINCT-A a joint CNPq project, FAPESP: 2008/57807-5
dc.description.sponsorshipIDNational Institute of Science and Technology in Astrophysics a joint FAPESP project, FAPESP: 2008/57807-5
dc.description.sponsorshipIDFAPESP: 2013/26258-4
dc.format.extent-
dc.identifierhttp://dx.doi.org/10.1142/S2010194517600369
dc.identifier.citationProceedings Of The 7th International Workshop On Astronomy And Relativistic Astrophysics (Iwara 2016). Singapore, v. 45, p. -, 2017.
dc.identifier.doi10.1142/S2010194517600369
dc.identifier.issn2010-1945
dc.identifier.urihttps://repositorio.unifesp.br/handle/11600/55458
dc.identifier.wosWOS:000410658500036
dc.language.isoeng
dc.publisherWorld Scientific Publ Co Pte Ltd
dc.relation.ispartofProceedings Of The 7th International Workshop On Astronomy And Relativistic Astrophysics (Iwara 2016)
dc.relation.ispartof7th International Workshop on Astronomy and Relativistic Astrophysics (IWARA)
dc.rightsAcesso restrito
dc.subjectPulsarsen
dc.subjectStar Rotationen
dc.subjectMagnetic Fieldsen
dc.titleA Model for the Braking Indices of Pulsarsen
dc.typeTrabalho apresentado em evento
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