A High Resolution UV Spectral Survey of the Sharp-Lined Chemically Peculiar B Star, Chi LUPI - Cycle 4

Astronomy and Astrophysics – Astrophysics

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Hst Proposal Id #5162 Stellar Astrophysics

Scientific paper

These observations constitute a GHRS Team project to complete an extensive survey of key wavelength regions in the rich UV spectrum of the remarkable, sharp-lined peculiar star, chi Lupi. The time required for a full GHRS echelle spectral atlas is prohibitive. However, an intelligently planned survey will provide an enormous spectroscopic data base for use in elemental abundance analyses and as a standard of reference for the study of other normal and peculiar B and A stars. As the atomic data base is progressively improved, the chi Lupi spectrum will continue to be studied for years to come. The starting point for the survey is the set of wavelength intervals observed under proposal 1182. The present observations will for the first time extend the observations of chi Lupi to the far-UV, side 1 domain. Wavelengths have been selected to provide data on transitions from the ground or low excitation states of the dominant stage of ionization of as many elements as possible. The selection of wavelength settings is based on what has been learned from the observations of proposal 1182.

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