Study of the Variability of the Delta-Scuti Stars - Part Seven - the Problem of Stability and Monoperiodicity in 20-CANUM-VENATICORUM

Details Study of the Variability of the Delta-Scuti Stars - Part Seven - the Problem of Stability and Monoperiodicity in 20-CANUM-VENATICORUM Study of the Variability of the Delta-Scuti Stars - Part Seven - the Problem of Stability and Monoperiodicity in 20-CANUM-VENATICORUM

Sep 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26as...53..399b&link_type=abstract

Astronomy and Astrophysics Supplement, Vol.53:3, P.399, 1983

Astronomy and Astrophysics

Astrophysics

3

Scientific paper

We can confirm the long term stability of the Delta Scuti star 20 CVn on the ground of 17 hours of observation obtained in 1982. However we suspect the presence of a second pulsational mode although this star was so far claimed as a monopulsator.
The small pulsational amplitude, like that of many other similar variable stars, still needs an exhaustive explanation. In this case, it may be connected with the excitation of several high order modes, which would be photometrically undetectable, and/or with a possible peculiar metallicity.

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