Ultraviolet and optical spectra of central stars of halo planetary nebulae.
Pena, M.; Torres-Peimbert, S.; Ruiz, M. T.
Mexico, Chile
Abstract
UV and optical spectrophotometric data on central stars of eight Population II planetary nebulae are analyzed. Visual magnitudes, spectral classification, color temperatures, and luminosities are derived from these data. All the stars in the sample exhibit an absorption-type spectrum, and most of them have normal H and He photospheric abundances, with the possible exception of M 2-29 and GJJC-1, which appear to be H-deficient.