Empirical constraints on the outer atmospheres of late-type giant stars with IUE

Details Empirical constraints on the outer atmospheres of late-type giant stars with IUE Empirical constraints on the outer atmospheres of late-type giant stars with IUE

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986iraj...17..300j&link_type=abstract

Irish Astronomical Journal (ISSN 0021-1052), vol. 17, March 1986, p. 300-307.

Astronomy and Astrophysics

Astronomy

Giant Stars, Iue, Late Stars, Stellar Atmospheres, Atmospheric Models, Atomic Excitations, Electron Density (Concentration), Emission Spectra, Loci, Spectral Line Width

Scientific paper

Useful constraints on the outer atmospheric structure of late-type giant stars can be obtained using emission lines observed with the IUE satellite if all important processes in the atomic excitation calculations are included. Carpenter et al. (1985) did not include such effects, and therefore overestimated the geometric extent of the emission regions. The Ayres and Linsky (1975) model for Alpha Boo satisfies most of the constraints derived below 8000 K, but the model has electron densities and linewidths that are a factor of about 2 smaller than those observed.

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