About Medium Infrared Excess in Binary Spectroscopic Systems
Debris Discs, Spectroscopic Binary Stars, Infrared Excess.
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 con-
juncture, it is sought through this thesis, debris discs in spectroscopic binary systems. The sample
was obtained from the WEBDA database, initially containing 25 open agglomerates with the lar-
gest populations of spectroscopic binary stars available, totaling 1033 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 genera-
ted 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 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.