Ultracool dwarf benchmarks with \emph{Gaia} primaries

F. Marocco, D. J. Pinfield, N. J. Cook, M. R. Zapatero Osorio, D. Montes, J. A. Caballero, M. C. Gálvez-Ortiz, M. Gromadzki, H. R. A. Jones, R. Kurtev, R. L. Smart, Z. Zhang, A. L. Cabrera Lavers, D. García Álvarez, Z. X. Qi, M. J. Rickard, L. Dover

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We explore the potential of \emph{Gaia} for the field of benchmark ultracool/brown dwarf companions, and present the results of an initial search for metal-rich/metal-poor systems. A simulated population of resolved ultracool dwarf companions to \emph{Gaia} primary stars is generated and assessed. Of order $\sim$24,000 companions should be identifiable outside of the Galactic plane ($|b| > 10\,$deg) with large-scale ground- and space-based surveys including late M, L, T, and Y types. Our simulated companion parameter space covers $0.02 \le M/M_{\odot} \le 0.1$, $0.1 \le {\rm age/Gyr} \le 14$, and $-2.5 \le {\rm [Fe/H]} \le 0.5$, with systems required to have a false alarm probability $ $0.6\, kau}\,
Original languageEnglish
Pages (from-to)4885–4907
JournalMonthly Notices of the Royal Astronomical Society
Issue number4
Early online date16 Jun 2017
Publication statusPublished - 1 Oct 2017


  • astro-ph.SR


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