Medeiros, José Renan deSoares, Bráulio Batista2014-12-172009-06-082014-12-172006-01-25SOARES, Bráulio Batista. Função de distribuição generalizada aplicada à velocidade de rotação estelar. 2006. 119 f. Tese (Doutorado em Física da Matéria Condensada; Astrofísica e Cosmologia; Física da Ionosfera) - Universidade Federal do Rio Grande do Norte, Natal, 2006.https://repositorio.ufrn.br/jspui/handle/123456789/16548In the present work we use a Tsallis maximum entropy distribution law to fit the observations of projected rotational velocity measurements of stars in the Pleiades open cluster. This new distribution funtion which generalizes the Ma.xwel1-Boltzmann one is derived from the non-extensivity of the Boltzmann-Gibbs entropy. We also present a oomparison between results from the generalized distribution and the Ma.xwellia.n law, and show that the generalized distribution fits more closely the observational data. In addition, we present a oomparison between the q values of the generalized distribution determined for the V sin i distribution of the main sequence stars (Pleiades) and ones found for the observed distribution of evolved stars (subgiants). We then observe a correlation between the q values and the star evolution stage for a certain range of stel1ar massapplication/pdfAcesso AbertoAstrofísicaEstrelasRotaçãoEstatística não-extensivadoctoralThesisCNPQ::CIENCIAS EXATAS E DA TERRA::FISICA