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

August 2013 • 2013MNRAS.433.2054S

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

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.


IPAC Authors

Federico Marocco

Assistant Scientist