OHP 2020 colloquium: Planets of red dwarf stars

27 sept.-2 oct. 2020
Observatoire de Haute-Provence - Observatoire de Haute-Provence (France)


M dwarfs, with masses of 0.5 to 0.1 solar mass, are called red stars because they mainly emit in the reddest part of the visible spectrum and in the near-infrared. Pioneer surveys showed that planets are very abundant around these stars and that these planets are mainly small. Moreover, through research and characterization techniques, it is easier to find planets with small masses, small radius and in the habitable zone, because the ratios with the star are favourable and associated periods are shorter. They are also the most abundant stars in the Galaxy and the closest, allowing us in the longer term to be able to separate them angularly from their stars for the next instrumentations. It is why new research programs and instruments have been developed to focus on M dwarfs planetary systems.
Discipline scientifique : Astrophysique

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