NPARSEC: NTT Parallaxes of Southern Extremely Cool objects. Goals, targets, procedures and first results

R.L. Smart, C.G. Tinney, B. Bucciarelli, F. Marocco, U. Abbas, A. Andrei, G. Bernardi, B. Burningham, C. Cardoso, E. Costa, M.T. Crosta, M. Dapra, A. Day-Jones, B. Goldman, H.R.A. Jones, M.G. Lattanzi, S.K. Leggett, P.W. Lucas, R. Mendez, J.L. PennaD.J. Pinfield, Leigh Smith, A. Sozzetti, A. Vecchiato

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)
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Abstract

The discovery and subsequent detailed study of T dwarfs have provided many surprises and pushed the physics and modelling of cool atmospheres in unpredicted directions. Distance is a critical parameter for studies of these objects to determine intrinsic luminosities, test binarity and measure their motion in the Galaxy. We describe a new observational programme to determine distances across the full range of T-dwarf subtypes using the New Technology Telescope (NTT)/SOFI telescope/instrument combination. We present preliminary results for ten objects, five of which represent new distances.

Original languageEnglish
Pages (from-to)2054-2063
Number of pages10
JournalMonthly Notices of the Royal Astronomical Society
Volume433
Issue number3
DOIs
Publication statusPublished - Aug 2013

Keywords

  • methods: data analysis
  • astrometry
  • parallaxes
  • proper motions
  • brown dwarfs
  • T-DWARF SEARCH
  • ALL-SKY SURVEY
  • ULTRACOOL BROWN DWARFS
  • LARGE-AREA SURVEY
  • L/T TRANSITION
  • SPECTRAL CLASSIFICATION
  • PROPER MOTIONS
  • 2MASS
  • DISCOVERY
  • BINARY

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