Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...202..136s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 202, no. 1-2, Aug. 1988, p. 136-142.
Astronomy and Astrophysics
Astrophysics
8
Carbon, Chromosphere, Emission Spectra, K Stars, Red Giant Stars, Supergiant Stars, Electron Density (Concentration), Gas Ionization, Stellar Models
Scientific paper
Line fluxes and intensity ratios of the C II UV 0.01 intercombination multiplet near λ2325 Å have been used by Carpenter et al. (1985) to determine the density and the geometric extent of red giant chromospheres. Here the authors test the limitations of the C II method and the validity of the assumptions inherent in the method by means of observations of C II 2325 Å emission of two stars (K type supergiants ζ Aurigae, 32 Cygni) for which spatially resolved, empirical model chromospheres has been derived earlier from high resolution IUE observations at chromospheric eclipse phases (Schröder, 1985).
Brown Adrian
Carpenter Kenneth G.
Reimers Dieter
Schroeder Klaus-Peter
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