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The sample of candidate faint high latitude carbon (FHLC) stars chosen fromthe Hamburg/ESO survey is a potential source to search for objects of raretypes. From medium resolution spectral analyses of about 250 objects from thissample, the object HE 1015-2050, was found to be a hydrogen-deficient carbon(HdC) star. Apart from U Aquarii, HE 1015-2050 is the only example, till now,of a Galactic cool HdC star that is characterized by strong spectral featuresof light s-process element Sr, and weak features of heavy s-process elementssuch as Ba. This object, with its enhanced carbon and hydrogen-deficiency,together with anomalous s- process spectral features, poses a challenge as faras the understanding of its formation mechanism is concerned. We discusspossible mechanisms for its formation in the framework of existing scenarios ofHdC star formation.

Spectroscopic characterization of FHLC stars from the Hamburg/ESO survey and a newly found HdC star