The nitrogen abundance of the very metal-poor star HD 122563.

The nitrogen abundance for the very metal-poor giant HD 122563 has been determined, using new spectroscopic plate data of the CH, NH, and CN molecular bands and a spectrum synthesis analysis. The results indicate that nitrogen is overabundant by a factor of 15 relative to iron, while carbon is underabundant by a factor of 3. Account has been taken of the influence of the unknown oxygen abundance on the carbon equilibrium. Subject headings: abundances, stellar - late-type stars - stars, individual - weak-line stars