Spectrographic observations of the beta CMa variable star gamma Pegasi

Details Spectrographic observations of the beta CMa variable star gamma Pegasi Spectrographic observations of the beta CMa variable star gamma Pegasi

Mar 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26as...43..359d&link_type=abstract

Astronomy and Astrophysics Supplement Series, vol. 43, Mar. 1981, p. 359-366.

Astronomy and Astrophysics

Astrophysics

11

B Stars, Stellar Spectra, Stellar Spectrophotometry, Variable Stars, Electronography, Line Spectra, Radial Velocity, Shock Wave Propagation

Scientific paper

From high dispersion spectra, new results are derived for the classical β CMa star γ Pegasi. Short time scale fluctuations similar to those observed in the continuum are observed at the minima of the radial velocity (RV) curves. Shock waves arising in the atmosphere of γ Pegasi could be responsible for the observed perturbations as well as for the variations of the amplitudes and shapes of the RV curves. The γ axis variations do not confirm a 6.83 day orbital period. The peculiar behaviour of the He I lines is analysed.

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