Finding T-Dwarf Companions to Gaia Primary Stars
Researcher (10):
Supervisor (3):
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1.
University of Hertfordshire
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2.
University of Zielona Góra
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3.
University of Valparaíso
Description
Abstract:
Since their discovery 30 years ago, T-dwarfs have been an area of interest due to their low masses and cool atmospheres; but the properties of lone brown dwarfs are notoriously hard to determine. By finding T-dwarfs that are part of wide binary systems with Gaia-detected stars, we can infer characteristics like their age from the primary star, helping us calculate other properties and building a better picture of the physics of T-dwarfs. We have employed the VISTA Hemisphere Survey and DES DR2 to perform a deep search for T-dwarfs reaching down to J=20. In this search, we have found T-dwarfs with spectral types of T4-T9 and proper motions ranging from 50 mas/yr to 1 arcsecond/yr, including confirmed T-dwarf companions to white dwarfs. Recently obtained FourStar observations have allowed us to confirm more companion T-dwarfs, and we have also obtained FIRE spectra of some of our confirmed companions to further restrain the T-dwarf properties.
Splinter: The Buddy System: Utilizing the Wealth of Host Star Data to Inform Substellar Physics
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Additional details
References
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