University of Hertfordshire

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From the same journal

By the same authors

Ultracool dwarf benchmarks with \emph{Gaia} primaries

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    Accepted author manuscript, 4.96 MB, PDF document

  • 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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Original languageEnglish
Pages (from-to)4885–4907
JournalMonthly Notices of the Royal Astronomical Society
Early online date16 Jun 2017
Publication statusPublished - 1 Oct 2017


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}\,


This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. © 2017 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

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