Optical spectroscopy of peculiar supergiants.
Klochkova V.G., Panchuk V.E., Szczerba R.
2001, in Proceedings of the conference "Post-AGB objects as a phase
of stellar evolution", eds. R. Szczerba & S.K. Gorny, ASSL 265,
Kluwer Academic Publishers, Boston/Dordrecht/London, p.265
Abstract:
-
Based on optical echelle spectra we
have determined the main parameters, the atmospheric
chemical abundances and the evolutionary status of a sample of peculiar
supergiants associated with infrared sources. In the spectra of some post--AGB
objects we have revealed strong emission C_2 Swan bands and absorption
features at the positions of well-known DIBs. An analysis of radial-velocities
and intensities led us to the conclusion that these spectral features originate
predominantly in the expanding circumstellar envelopes.
Gzipped PostScript version of this paper is available:
SAO_PPNe.ps.gz
Back to Szczerba's home
page or list
of publications