Variability of the H-alpha line in the spectrum of the Delta-Scuti star Tau Pegasi

Details Variability of the H-alpha line in the spectrum of the Delta-Scuti star Tau Pegasi Variability of the H-alpha line in the spectrum of the Delta-Scuti star Tau Pegasi

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pazh...13..321g&link_type=abstract

Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 13, April 1987, p. 321-325. In Russian. In Russian. In Russian.

Astronomy and Astrophysics

Astronomy

1

H Alpha Line, Stellar Oscillations, Stellar Spectra, Variable Stars, Radial Velocity, Spectral Line Width, Spectrum Analysis, Stellar Atmospheres, Stellar Spectrophotometry

Scientific paper

In order to find and identify high-frequency radial oscillations in pulsating δ Scuti-type stars, it is suggested to use the information on variations in the equivalent width and radial velocity of spectral lines formed in the outer layers of atmospheres (e.g. Hα). From spectrograms rapid variability of the Hα line in τ Peg has been found; this is interpreted as manifestation of radial oscillations in the 3 and 5 overtones.

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