Aplicação do Date Compensate Discrete Fourier Transform e do Minimum String Length na determinação de períodos orbitais de binárias eclipsantes com Anãs M

Abstract

The light curves acquired by these satellites can present periodic variations from intermittences of the most diverse sources and their study allows us to better understand the stars. In this work, codes based on the Date Compensate Discrete Fourier Transform (DCDFT) and Minimum String Lenght (MSL) techniques were developed, together with an automation routine. Aiming the direct determination of the orbital periods of 12 eclipsing binaries composed of M dwarfs, without the need for visual inspection, as did the previous results in the literature. At first, both methods failed to remain consistent with the literature, with MSL having divergent results for shorter periods while DCDFT had for longer ones. After performing a process of flattening the light curves, the results found through the DCDFT were in agreement with the literature, except in three cases of low eccentricity, where the method found half value for the period. However, even after this treatment with the light curves, the MSL results maintained the same pattern, agreeing only with the higher values of the literature.