Please use this identifier to cite or link to this item: http://localhost:8080/handle/prefix/9
Full metadata record
DC FieldValueLanguage
dc.contributor.advisor1Oliveira, José Carlos Teixeira de-
dc.contributor.advisor1Latteshttp://lattes.cnpq.br/8927629462731051pt_BR
dc.creatorGomes, Luzinete Vilanova da Silva-
dc.creator.Latteshttp://lattes.cnpq.br/2761540727403077pt_BR
dc.date.accessioned2018-04-27T15:11:11Z-
dc.date.available2018-04-27T15:11:11Z-
dc.date.issued2018-04-27-
dc.identifier.urihttp://localhost:8080/handle/prefix/9-
dc.description.abstractIn the present work we obtained the equation of state to be used to study the structure of proto-neutron stars. To this end, we adopted the model of Zimanyi-Moszkowski in the mean field approximation. In this model the equation of state consists of the octet of baryons of spin 1=2 (n, p, L0, S􀀀, S0, S+, X􀀀, X0) and of the baryonic resonances of spin 3=2, represented by the delta matter (D􀀀, D0, D+, D++) and by W􀀀 , in the baryonic sector. In the leptonic sector we consider the electrons, the muons and the trapped neutrinos. Thus, we studied the effects of the corresponding neutrinos on the equation of state during the initial formation of a neutron star. We discuss as well the structure of the proto-neutron star including the delta resonances in their composition, and compared the results at the cooling phase induced by escape of neutrinos. From the equation of state obtained with this model we solve numerically the equation TOV (Tolman-Oppenheimer-Volkoff) and so we obtained the values of the maximum mass, before and after cooling.pt_BR
dc.description.resumoNo presente trabalho obtivemos a equac¸ ˜ao de estado para ser usada no estudo da estrutura de proto-estrelas de nˆeutron. Para tanto, adotamos o modelo de Zimanyi-Moszkowski numa aproximac¸ ˜ao de campo m´edio. Neste modelo a equac¸ ˜ao de estado consiste do octeto de b´arions de spin 1=2 (n, p, L0, S􀀀, S0, S+, X􀀀, X0) e das ressonˆancias bariˆonicas de spin 3=2, representadas pela mat´eria de delta (D􀀀, D0, D+, D++) e por W􀀀, no setor bariˆonico. J´a no setor leptˆonico consideramos os el´etrons, os m´uons e os correspondentes neutrinos aprisionados. Dessa forma, estudamos os efeitos dos neutrinos sobre a equac¸ ˜ao de estado nos instantes iniciais da formac¸ ˜ao de uma estrela de nˆeutron. Discutimos assim a estrutura da proto-estrela de nˆeutron incluindo as ressonˆancias delta em sua composic¸ ˜ao, e comparamos os resultados na fase de resfriamento induzido pelo escape de neutrinos. A partir da equac¸ ˜ao de estado obtida com o referido modelo, resolvemos numericamente a equac¸ ˜ao TOV (Tolman-Oppenheimer-Volkoff) e assim obtivemos os valores da massa m´axima, antes e ap´os o resfriamento.pt_BR
dc.description.provenanceSubmitted by biblioteca biblioteca (biblioteca@ufrr.br) on 2018-04-27T15:11:11Z No. of bitstreams: 1 Proto-estrelas de Nêutron com Ressonâncias Delta usando o modelo de Zimanyi - Moszokowski.pdf: 1933841 bytes, checksum: a931ef8719368e1e64b33b87ce2c5a55 (MD5)en
dc.description.provenanceMade available in DSpace on 2018-04-27T15:11:11Z (GMT). No. of bitstreams: 1 Proto-estrelas de Nêutron com Ressonâncias Delta usando o modelo de Zimanyi - Moszokowski.pdf: 1933841 bytes, checksum: a931ef8719368e1e64b33b87ce2c5a55 (MD5) Previous issue date: 2010-01-01en
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superiorpt_BR
dc.languageporpt_BR
dc.publisherUniversidade Federal de Roraimapt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentCCT - Centro de Ciência e Tecnologiapt_BR
dc.publisher.programPPGFIS - Programa de Pós-Graduação em Físicapt_BR
dc.publisher.initialsUFRRpt_BR
dc.rightsAcesso Abertopt_BR
dc.subjectEstrelas de nêutronpt_BR
dc.subjectModelo de Waleckapt_BR
dc.subjectAstrofísicapt_BR
dc.subject.cnpqCNPQ::CIENCIAS EXATAS E DA TERRA::FISICApt_BR
dc.titleProto-estrelas de Nêutron com ressonâncias Delta usando o modelo de Zimanyi-Moszokowskipt_BR
dc.typeDissertaçãopt_BR
Appears in Collections:PPGFIS - Programa de Pós-Graduação em Física

Files in This Item:
File Description SizeFormat 
Proto-estrelas de Nêutron com Ressonâncias Delta usando o modelo de Zimanyi - Moszokowski.pdf1.89 MBAdobe PDFView/Open
Show simple item record Recommend this item


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.