High-resolution line profiles of T Tauri stars

Details High-resolution line profiles of T Tauri stars High-resolution line profiles of T Tauri stars

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apjs...41..369s&link_type=abstract

Astrophysical Journal Supplement Series, vol. 41, Nov. 1979, p. 369-389.

Astronomy and Astrophysics

Astrophysics

36

High Resolution, Line Shape, Stellar Spectrophotometry, T Tauri Stars, Absorption Spectra, D Lines, H Alpha Line, Sodium, Spectral Resolution

Scientific paper

Thirty-three relative intensity hydrogen and sodium line profiles obtained from spectra of 10 T Tauri stars are presented. These profiles were derived from echelle spectrograms having a typical resolution of 0.20 A. The T Tauri stars observed span the range of emission-intensity classes listed in Herbig and Rao (1972). Seventy percent of the H alpha profiles show blue-displaced absorption components with velocities up to 250 km/sec. Na D emission features are observed in all the stars with emission-intensity classes higher than 2. The Na D lines in T Tauri show intensity changes on a time scale of months. The H alpha-line equivalent width in T Tauri can change by 40% in 3 days.

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