The observations of NGC 1997 and OHSC 28 were performed using the Tektronix 2K CCD #3 at the 0.9m telescope at the Cerro Tololo Inter-American Observatory (CTIO) on 1997 December 20 and 23, respectively, while those of NGC 1697, SL 133 and SL 663 were obtained with the Danish Faint Object Spectrograph and Camera (DFOSC) on the 1.54m Danish

The CoRoT space mission routinely provides high-precision photometric measurements of thousands of stars that have been continuously observed for months. The discovery and characterization of the first very massive transiting planetary companion with a short orbital period is reported. A series of 34 transits was detected in the CoRoT light curve

We present high-resolution (R ~ 50, 000) observations of near-IR transitions of CO and CN of the five known hydrogen-deficient carbon (HdC) stars and four R Coronae Borealis (RCB) stars. We perform an abundance analysis of these stars by using spectrum synthesis and state-of-the-art MARCS model atmospheres for cool hydrogen-deficient stars. Our

Not Available

Not Available

Not Available