Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981aj.....86.1526s&link_type=abstract
Astronomical Journal, vol. 86, Oct. 1981, p. 1526-1539.
Astronomy and Astrophysics
Astronomy
25
Absorption Spectra, Forbidden Bands, High Dispersion Spectrographs, Radial Velocity, Stellar Spectra, T Tauri Stars, Emission Spectra, K Stars, Line Spectra, Photoelectric Emission, Photosphere, Spectrum Analysis
Scientific paper
Echellograms have been obtained of the T Tauri star RU Lup over a period of decreasing light. Near minimum light (V approximately 11.6), a photospheric absorption-line spectrum was detected typical of a K-type star. Although the radial velocity of the absorption lines (-0.5 + or - 2.8 km/s) agrees closely with the dark cloud velocity (-1.1 km/s), the forbidden emission lines have a radial velocity of -13.7 + or - 5.0 km/s. The greatest surprise is in the radial velocities of the broad permitted emission lines, for which the radial velocity is found to be + or - 5.4 km/s. Possible origins of the discrepancy in velocity between the absorption lines and permitted emission lines are discussed.
Heuermann R. W.
Schwartz Richard D.
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