Thursday, June 20, 2013

1306.4527 (R. L. Smart et al.)

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

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. Lucas, R. Mendez, J. L. Penna, D. Pinfield, L. Smith, A. Sozzetti, A. Vecchiato
The discovery and subsequent detailed study of T dwarfs has provided many surprises and pushed the physics and modeling 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 program to determine distances across the full range of T dwarf sub-types using the NTT/SOFI telescope/instrument combination. We present preliminary results for ten objects, five of which represent new distances.
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