H-alpha line variability in the spectra of stars of the lower part of the instability strip - Theta UMa

Details H-alpha line variability in the spectra of stars of the lower part of the instability strip - Theta UMa H-alpha line variability in the spectra of stars of the lower part of the instability strip - Theta UMa

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pazh...16.1107m&link_type=abstract

Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 16, Dec. 1990, p. 1107-1112. In Russian. In Russian.

Astronomy and Astrophysics

Astronomy

H Alpha Line, Radial Velocity, Stellar Oscillations, Stellar Spectra, Astronomical Spectroscopy, Variability

Scientific paper

From 20 spectrograms of the pulsating delta-Scuti star Theta UMa,
obtained November 26-27 1986, variability is detected in the radial
velocities of the H-alpha hydrogen line with period 0.063 d. This
variability has an amplitude of 2K = 12.3 km/s and is taken to be caused
by oscillations in the third radial overtone.

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