Giants Stars
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Caracterização infravermelho e distribuição espectral de energia para as estrelas com planetas
In this work we study the behavior of the stars belonging to planetary systems in what concern implications its infrared characteristics and the spectral energy distribution (SED). Our study is based on detailed analysis of the behavior on the infrared emission for 48 stars with planets, classied as stars on the main sequence, subgiants and giants. The data
Publicado em: 2008
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2. Sobre a natureza dos processos físicos de aquecimento da atmosfera de estrelas do tipo solar
In the present work, we have studied the nature of the physical processes of the coronal heating, considering as basis significant samples of single and binary evolved stars, that have been achieved with the ROSAT satellite. In a total of 191 simple stars were studied, classified in the literature as giants with spectral type F, G and K. The resu
Publicado em: 2008
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3. Uma análise teórica da evolução da rotação estelar
Nos últimos cinqüenta anos, grandes esforços foram feitos no intuito de se entender a evolução estelar. No contexto observacional, medidas precisas da velocidade rotacional projetada foram produzidas, em particular, pelos grupos de Natal e Genebra. Destes dados é possível no presente momento estabelecer o comportamento da rotação estelar do turno
Publicado em: 2007
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4. Determination of chemical abundances in yellow symbiotic stars from the southern hemsiphere / "Determinação de abundâncias químicas em simbióticas amarelas austrais"
The present work is a contribution to the study of chemical composition of southern symbiotic stars, scarcely studied in literature. We present a complete set of yellow southern symbiotic stars extracted from Belczynski. Some of the objects analyzed had no spectroscopic data in literature. The data were obtained using 1.6m telescope in LNA, Brazil and the IU
Publicado em: 2004
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5. EMISSION-LINE OBJECTS PROJECTED UPON THE GALACTIC BULGE*
Low-dispersion slit spectrograms have been obtained of 34 faint objects that lie in the direction of the galactic bulge and have the Hα line in emission upon a detectable continuum. Eleven of these are certain or probable symbiotic stars. A rough comparison with R CrB stars in the same area suggests that these brightest symbiotics in the bulge have in the m