Rotação e energia de erupções em estrelas de tipos espectrais K e M observadas pelo satélite TESS

Abstract

Under the development of new technologies, the Aerospace Engineering is increasingly improving its equipments in order to assist exploration that goes beyond our Heliopause. As an example of this we can cite the launch of the space artfact Transiting Exoplanet Survey Satellite (TESS) that has been contributing with photometric data to Space Sciences, like Astrophysics, with the aim of study various physical phenomena. As an exemple, the magnetic activity of stars can be fundamental in forming the atmosphere of exoplanets and impact their habitability as well as, it can trigger life in the orbit of type K and M stars, which are considered to be cold and they are the most numerous in the main sequence phase in the Hertzsprung-Russell diagram. Based on these investigations and through statistical analysis of the behavior of stellar flares in relation to their classifcations, rotational periods and spectral subtype, this dissertation presents a study on the variation of energy of stellar flares as a function of their rotational period in a new sample of 679 TESS stars of spectral type K and M. None of the stars in this sample showed a correlation between the energy of their surface stellar eruptions as a function of their rotational period. Finally we present four scenarios involving the stars and their stellar eruptions and theirs that can explain our results.