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. Lucas, R. Mendez, J. L. Penna, D. Pinfield
TL;DR
This paper introduces NPARSEC, a program using the NTT/SOFI telescope to measure distances to T dwarfs, providing new data crucial for understanding their properties and distribution.
Contribution
It presents a new observational approach for measuring distances to T dwarfs, including initial results for ten objects, with five having newly determined distances.
Findings
Preliminary distance measurements for ten T dwarfs.
Five objects have newly determined distances.
Supports further studies of T dwarf properties and distribution.
Abstract
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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