High-resolution spectroscopy of the T Tauri star RU LUPI

Details High-resolution spectroscopy of the T Tauri star RU LUPI High-resolution spectroscopy of the T Tauri star RU LUPI

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984aj.....89.1635b&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 89, Nov. 1984, p. 1635-1649.

Astronomy and Astrophysics

Astronomy

22

Line Spectra, Optical Emission Spectroscopy, Southern Sky, Stellar Spectra, T Tauri Stars, Emission Spectra, H Alpha Line, High Resolution, K Lines, Metallic Stars, Spectral Line Width

Scientific paper

Clear evidence of changes in the details of line profile shapes, velocities, and intensities of components have been noted by a monitoring program for the strong emission line star RU Lup, using echelle spectrograms. The overnight changes in the line-to-continuum ratio support the suggestion that these light variations are caused by nonuniform spatial distribution in chromospheric activity, coupled with stellar rotation. The strength of the 'central' absorption changes from night to night. A nonspherical geometry for the shell, coupled with the 3.7-day rotation, can account for the observed variations, especially if the shell is elongated on one side due to enhanced outflow along open magnetic field lines.

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