Caracterização infravermelho e distribuição espectral de energia para as estrelas com planetas

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

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 of infrared photometric was analyzed in the bands 12, 25 and 60m of the IRAS catalogue of Point Sources (IPSC) and the bands JHK of 2 Micron All Sky Survey (2MASS). From the computation of the positional discrepancy of the sources and from the computation of the color index, we selected and located the objects in the IRAS color-color diagram. This diagram allows to identify possible objects with dust disks. We also analyzing the spectral energy distribution where we observe some infrared excess, with this, we conrm the presence of the dust disk in the identied objects in the color-color diagram. In spite of the current sample of stars with planets just include a subset of stars with planets detected in the solar neighborhood, the present analysis of the infrared fluxes of these objects offer an unique possibility to study the infrared characteristics of stars belonging to the extra-solar planetary systems. In this context, our study points to interesting results, among other we emphasize the fact that some stars with planets presents a peculiar ux [60-25], indicating the co-existence of dust together with the planets of these extrasolar systems

ASSUNTO(S)

infravermelho distribuição espectral de energia fisica

ACESSO AO ARTIGO

Documentos Relacionados