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Astron. Astrophys. 336, 490-502 (1998) AcknowledgementsWe gratefully acknowledge the guidance of Jean-Charles Cuillandre for the reduction of the UH8K images and the help of Christian Veillet for the astrometric calibration of the frames. We thank I. Baraffe, A. Burrows, G. Chabrier, and F. D'antona for making their models available to us before publication. JRS gratefully acknowledges support from NASA via grants NAGW-2698 and NAG5-3363.
© European Southern Observatory (ESO) 1998 Online publication: July 20, 1998 ![]() |