Estrelas: uma análise da sequência principal do diagrama h-r

Abstract

Studying the stars is an effective way to understand some processes that occur on the Sun and vice versa, hence its importance. Although the stars are distributed along some specific regions of the Hertzprung-Russel Diagram or H-R Diagram, in this work, the focus was restricted to stars of the main sequence, of which the Sun is part. We selected some stars from this region of the H-R Digram and divided them into three categories. These categories were determined by their respective masses. In this way, an empirical relationship was obtained between the masses and luminosities of the stars, in each of these categories. With that in mind, we estimate the lifetime of each of them on the main sequence. Applying Stefan Boltzmann's Law to each of these selected stars, we were able to estimate the value of their radii and, using their visual and absolute magnitudes, we calculated how far they are from the Earth.