Characterizing the stellar-substellar limit: a step towards a better understanding of the ultra-cool dwarfs revealed by Gaia
LAGARDE, Nadège
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
Univers, Théorie, Interfaces, Nanostructures, Atmosphère et environnement, Molécules (UMR 6213) [UTINAM]
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Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
Univers, Théorie, Interfaces, Nanostructures, Atmosphère et environnement, Molécules (UMR 6213) [UTINAM]
LAGARDE, Nadège
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
Univers, Théorie, Interfaces, Nanostructures, Atmosphère et environnement, Molécules (UMR 6213) [UTINAM]
< Reduce
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
Univers, Théorie, Interfaces, Nanostructures, Atmosphère et environnement, Molécules (UMR 6213) [UTINAM]
Language
en
Communication dans un congrès
This item was published in
SF2A-2021: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics., SF2A-2021: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics., SF2A-2021: Annual meeting of the French Society of Astronomy and Astrophysics., 2021-06-07, En ligne. 2021-12
English Abstract
Ultra-cool dwarfs (spectral type later than M7) serve as a link between stars and brown dwarfs which have not a sufficient mass to support the combustion of hydrogen. Although they are numerous in the Galaxy, they remain ...Read more >
Ultra-cool dwarfs (spectral type later than M7) serve as a link between stars and brown dwarfs which have not a sufficient mass to support the combustion of hydrogen. Although they are numerous in the Galaxy, they remain elusive due to their low luminosity and the modelling is still a chalenge. In this work we characterized 120 ultra-cool dwarfs revealed by Gaia for which spectroscopic monitoring have been obtained using various instruments of medium spectral resolution. Our results illustrate the impact of physics considered in atmospheric models on the characterization of these objects.Read less <
English Keywords
stars: low-mass
ultra-cool dwarfs
brown dwarfs
spectroscopy
Origin
Hal imported