Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.281b..97j&link_type=abstract
In ESA, Proceedings of the Celebratory Symposium on a Decade of UV Astronomy with the IUE Satellite, Volume 2 p 97-100 (SEE N89-
Astronomy and Astrophysics
Astronomy
4
Iue, Spaceborne Astronomy, Stellar Atmospheres, Stellar Spectra, T Tauri Stars, Ultraviolet Astronomy, Ultraviolet Spectra, Electron Density Profiles, Emission Spectra, Line Spectra, Stellar Models, Stellar Winds
Scientific paper
Emission line fluxes were used to establish the emission measure distribution for T Tau and RU Lupi. Intersystem lines are used to constrain the electron density in the emitting regions. These are compared with the results of Alfven wave driven wind models. Observed emission line widths and absorption components formed in the stellar winds are also compared with the theoretical predictions. It is concluded that the transition region lines are not formed in the wind and that the large widths of these emission lines are caused by nonthermal turbulent motions. However, the intersystem lines formed at Te less than or = 10,000 K indicate the presence of a lower density region, identified with the wind. Alfven-wave driven winds, with T max = 10,000 K long damping lengths, and high initial wave amplitudes may be able to account for the observed characteristics.
Jordan Cathy
Kuin Paul N. M.
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