Elemental abundances in the Hg-Mn star γ Corvi.

Abstract

Spectral data obtained at ESO, Observatoire de Haute-Provence and with the IUE covering the 120-910nm spectral range allowed us to determine the abundances of 21 elements in the atmosphere of the moderately fast rotating Hg-Mn star γ Corvi. We find that helium, carbon, nitrogen, magnesium, aluminium, silicium, sulfur, chromium, iron and nickel are underabundant with respect to solar values. Beryllium, boron, calcium, phosphorus, titanium, manganese, copper, zinc, gallium and yttrium are overabundant by factors up to 2.5dex. The oxygen abundance is found to be solar. This pattern is not unusual among Hg-Mn objects.