Radial-velocity variations of T Tauri

Details Radial-velocity variations of T Tauri Radial-velocity variations of T Tauri

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pazh...16..817z&link_type=abstract

Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 16, Sept. 1990, p. 817-827. In Russian. In Russian. In Russian.

Astronomy and Astrophysics

Astronomy

Radial Velocity, Stellar Rotation, Stellar Spectrophotometry, T Tauri Stars, Absorption Spectra, Emission Spectra, Photosphere, Starspots, Stellar Magnetic Fields, Stellar Spectra

Scientific paper

A 6 m reflector with a dispersion of 27 A/mm and a wavelength range of 3900-5000 A was used to obtain spectra of T Tauri. Radial velocities of T Tauri are derived using the absorption lines. Fast variations are observed in the 22-41 km/s range with an average value of 29.5 + or - 1.1 km/s. A fairly accurate modulation of the radial velocity is found to have a period of 2.8 d, established through the use of photometric data (Herbst et al., 1986). From collected data it is concluded that changes in radial velocity are the result of a saturation of the photospheric absorption lines by the emission lines originating in unstable chromospheric regions.

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