The RV-variations of γ Coronae Borealis - a frequency analysis.

Details The RV-variations of γ Coronae Borealis - a frequency analysis. The RV-variations of γ Coronae Borealis - a frequency analysis.

Nov 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...327..167l&link_type=abstract

Astronomy and Astrophysics, v.327, p.167-172

Astronomy and Astrophysics

Astrophysics

5

Stars: Early-Type, Stars: Individual: {Gamma} Crb, Stars: Oscillations, {Delta} Scu

Scientific paper

We summarize a longer campaign of spectroscopic observations of the suspected Maia variable star γCrB . Previously published data are complemented by two-longitudinal observations. We investigate 1262 CCD spectra for short-term radial velocity variations. Results show that A0 stars can pulsate with periods quite similar to those of the well-known δ Scu stars. From a frequency analysis of the data we can derive at least three periods with significant contributions to a multiple frequency model. The probable rotational period of the star is in the order of 0.9d, and the observed short-term periods are arranged in a triplet around 0.1d. The observed relation of the frequencies points to the occurrence of rotationally split non-radial pulsations.

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