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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Analise do Excesso de Infravermelho de Estrelas Evoluídas Observadas pelo Satelite Kepler

Lima Junior, Jose Edvaldo De 21 December 2015 (has links)
Submitted by Automação e Estatística (sst@bczm.ufrn.br) on 2018-08-02T14:41:54Z No. of bitstreams: 1 JoseEdvaldoDeLimaJunior_DISSERT.pdf: 8648608 bytes, checksum: ac60121306bdbf8de8b282fdde78c614 (MD5) / Approved for entry into archive by clediane guedes (clediane@bczm.ufrn.br) on 2018-08-02T15:23:30Z (GMT) No. of bitstreams: 1 JoseEdvaldoDeLimaJunior_DISSERT.pdf: 8648608 bytes, checksum: ac60121306bdbf8de8b282fdde78c614 (MD5) / Made available in DSpace on 2018-08-02T15:23:30Z (GMT). No. of bitstreams: 1 JoseEdvaldoDeLimaJunior_DISSERT.pdf: 8648608 bytes, checksum: ac60121306bdbf8de8b282fdde78c614 (MD5) Previous issue date: 2015-12-21 / Este trabalho tem como foco principal a análise do infravermelho das 1916 estrelas gigantes vermelhas do catálogo de Pinsonneault. Para realizar tal análise nos utilizamos da avaliação do diagrama cor-cor como primeiro critério de seleção para a procura de estrelas com excesso de infravermelho, das quais 47 estrelas foram selecionadas, depois analisamos as distribuições espectrais de energia ou SED onde 29 estrelas foram selecionadas e para confirmação do excesso de infravermelho, passamos pela inspeção visual, onde das 29 estrelas apenas uma não apresentou contaminação por background de galáxias ou por uma estrela próxima. Na inspeção visual, e nas SEDS analisamos o excesso nas bandas W1, W2 e principalmente nas bandas W3 e W4 do satélite WISE. Por fim calculamos a temperatura dessa poeira em aproximadamente 200K. / This work has focused primarily on the analysis of infrared of 1916 red giant stars Pinsonneault catalog. To perform this analysis we use the evaluation of the color-color diagram as a first selection criterion looking for stars with infrared excess, of which 47 were selected stars, then we analyze the spectral energy distributions or SED where 29 stars were selected and infrared excess of confirmation, We passed the visual inspection, where the 29 stars one, the KIC9728845 star, showed no contamination by background galaxies or a nearby star. On visual inspection, and the SEDS analyzed over the bands W1, W2 and W3 mainly by bands and bands W3 and W4 satellite WISE. Finally we calculate the tempertura this dust at about 200K.

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