Bibliographic Details
| Title: |
The Gaia ultracool dwarf sample – V: the ultracool dwarf companion catalogue. |
| Authors: |
Baig, Sayan1,2 (AUTHOR) s.baig@herts.ac.uk, Smart, R L1,2 (AUTHOR), Jones, Hugh R A1 (AUTHOR), Gagné, Jonathan3,4 (AUTHOR), Pinfield, D J1 (AUTHOR), Cheng, Gemma1 (AUTHOR), Moranta, Leslie3,4,5 (AUTHOR) |
| Source: |
Monthly Notices of the Royal Astronomical Society. Oct2024, Vol. 533 Issue 4, p3784-3810. 27p. |
| Subject Terms: |
*BROWN dwarf stars, *LOW mass stars, *PARAMETERS (Statistics), *ASTRONOMICAL surveys, *DATA release |
| Abstract: |
We present the Ultracool Dwarf Companion Catalogue of 278 multiple systems, 32 of which are newly discovered, each with at least one spectroscopically confirmed Ultracool Dwarf, within a 100 pc volume-limited sample. This catalogue is compiled using the Gaia Catalogue of Nearby Stars for stellar primaries and the Gaia Ultracool Dwarf Sample for low-mass companions and includes 241 doubles, 33 triples, and 4 higher-order systems established from positional, proper motion, and parallax constraints. The catalogue seeks to identify probable benchmark systems within 100 pc to obtain model-independent astrophysical parameters of Ultracool Dwarfs. Chance alignment probabilities are calculated to evaluate the physical nature of each system. Astrometric and photometric data from Gaia Data Release 3 and the Two Micron All Sky Survey are included for all objects. We identify potential unseen companions using a combination of the renormalized unit weight error, image parameter determination statistics, non-single star solutions, and photometric blending as provided by Gaia , identifying hierarchical Ultracool triple systems. Our catalogue includes 17 White Dwarf – Ultracool Dwarf systems, whose ages are determined using cooling models. We also use the Gaia FLAME results and the BANYAN Σ procedures to age 40 and 34 systems, respectively, and derive mass estimates from evolutionary models. [ABSTRACT FROM AUTHOR] |
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| Database: |
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