Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.263..177b&link_type=abstract
In ESA Proceedings of an International Symposium on New Insights in Astrophysics. Eight Years of UV Astronomy with IUE p 177-17
Astronomy and Astrophysics
Astrophysics
Light (Visible Radiation), Periodic Variations, Stellar Spectra, T Tauri Stars, Ultraviolet Spectra, Faculae, Interstellar Extinction, Iue, Stellar Envelopes, Stellar Winds
Scientific paper
Ultraviolet and optical observations of the T Tauri star RY Tau were analyzed. They show evidence for strong variability over 1985 to 1986. High dispersion IUE observations of the Mg II emission line profiles show significant changes in the wind of RY Tau, with the wind absorption almost disappearing on 1986 March 20. The behavior of the emission line flux variability when compared to the optical light curve shows evidence for changes in circumstellar extinction and changes in starspot/plage distribution on the visible hemisphere of the star.
Brown Adrian
Drake Stephen Alan
Herbst William
Linsky Jeffrey L.
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