Far UV line widths in RU LUPI

Details Far UV line widths in RU LUPI Far UV line widths in RU LUPI

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982esasp.176...95p&link_type=abstract

In ESA 3rd European IUE Conf. p 95-98 (SEE N83-11889 02-88)

Physics

7

Far Ultraviolet Radiation, Line Spectra, Spectral Line Width, T Tauri Stars, Iue, Magnetohydrodynamic Waves, Stellar Temperature, Stellar Winds, Wind Velocity

Scientific paper

Two high dispersion spectra from the IUE LWR instrument, and one from the SWP instrument, were analyzed. The Mg II line widths are very similar to the Ca II and Balmer lines (approximately 250 and 240 km/sec.) The UV higher excitation lines, C IV, Si IV, Si III and C III show widths very similar to those of the optical He lines, and are narrower than the strong Mg II, Ca II and Balmer lines. This is consistent with a model wind driven by Alfven waves in which, after a maximum near 250 km/sec, the wind velocity decreases away from the star while the gas temperature rises.

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