Sobre o excesso no infravermelho médio em sistemas binários espectroscópicos

• Ano de defesa: 2021
• Autor(a) principal: Brito, André Chaves de
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Rio Grande do Norte; Brasil; UFRN; PROGRAMA DE PÓS-GRADUAÇÃO EM FÍSICA
• Palavras-chave em Português: Discos de detritos; Estrelas binárias espectroscópicas; Excesso no infravermelho
• Link de acesso: https://repositorio.ufrn.br/handle/123456789/37166

The presence of circumstellar material is seen as a powerful indicator for the formation of planetary systems similar to our Solar System. It is known that nearby binary stars have a more extensive habitability zone when compared to individual stars, making them the target of several researches, however, studies on debris discs in systems of this nature are still incipient. Faced with this conjuncture, it is sought through this thesis, debris discs in spectroscopic binary systems. The sample was obtained from the WEBDA database, initially containing 25 (twenty five) open agglomerates with the largest populations of spectroscopic binary stars available, totaling 1033 (one thousand and thirty three) candidates. The search for excess in the infrared occurred in the 3.4 µm, 4.6 µm, 12 µm and 22 µm bands of WISE and was performed through a comparison from the SEDs (Spectral Energy Distribution) obtained by the photometric data from the GAIA missions, 2MASS and WISE and the synthesized curve generated by the BT-Settl model, available on the virtual platform VOSA (Observatory Sed Analyzer). The stars with excess in the infrared have passed through visual inspection and had their galactic latitudes checked, resulting in a final sample with 6 (six) confirmed spectroscopic binary systems with disc presence. After these procedures, the main parameters that characterize the debris discs were calculated and, among other results, it was possible to verify that non-evolved binary spectroscopic systems, belonging and open agglomerates, can house stable circumbinary debris discs.