We thank M. Marley for kindly providing the temperature-pressure profiles and D. Saumon for the continuum opacity data. We also thank the referee for valuable suggestions and constructive comments. Thanks are due to N. K. Rao, T. P. Prabhu, T. N. Rengarajan, K. E. Rangarajan and G. Pandey for useful discussions.
© European Southern Observatory (ESO) 2000
Online publication: June 8, 2000