Rapid and slow variations in the spectrum of SU AUR

Details Rapid and slow variations in the spectrum of SU AUR Rapid and slow variations in the spectrum of SU AUR

Jul 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981afz....17..519t&link_type=abstract

(Astrofizika, vol. 17, July-Sept. 1981, p. 519-534.) Astrophysics, vol. 17, no. 3, Jan. 1982, p. 291-298. Translation.

Astronomy and Astrophysics

Astrophysics

3

Spectral Line Width, Stellar Spectra, Stellar Spectrophotometry, Variable Stars, Annual Variations, Diurnal Variations, H Lines, Radial Velocity, T Tauri Stars

Scientific paper

Fifty-one spectra of SU Aur observed with the 2-m telescope of the Shemakha Observatory are examined to reveal rapid variations in the equivalent widths and radial velocities of the absorption lines of H, Fe, and Ca. Available photometric data on SU Aur are also analyzed. The variations occur on the order of a few minutes, irregularly, and with a variable amplitude. Variations from night to night and seasonal variations are also detected, and an analysis of curves showing variations of the radial velocities of SU Aur is found to encounter the usual difficulties for all T Tau stars.

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