Ultracool dwarfs in Gaia
C\'eline Reyl\'e
TL;DR
This paper reviews how Gaia's precise astrometric data, despite optical limitations, advances the study of ultracool dwarfs and the stellar-substellar boundary.
Contribution
It summarizes Gaia catalogues' contributions and presents new characterizations and scientific uses of Gaia data for ultracool objects.
Findings
Gaia provides precise parallaxes for ultracool dwarfs.
Gaia data enhances understanding of the stellar-substellar boundary.
The paper discusses future research directions using Gaia data.
Abstract
The Gaia optical observations are not the most suitable spectral domain for studying the low-mass, faintest and reddest part of the main sequence. Nevertheless, the large number of objects observed with an unprecedented precision, including trigonometric parallax, makes it an unrivaled dataset for studying the stellar-substellar boundary. In this paper, I review the contribution of the successive catalogues offered by the Gaia mission to study the low-mass, ultra-cool objetcs. I also present further characterisations and scientific exploitations of the Gaia sample.
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astronomy and Astrophysical Research · Astro and Planetary Science