The double-mode Cepheid CO AUR

Details The double-mode Cepheid CO AUR The double-mode Cepheid CO AUR

Feb 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...118..321m&link_type=abstract

Astronomy and Astrophysics, vol. 118, no. 2, Feb. 1983, p. 321-324.

Astronomy and Astrophysics

Astrophysics

23

Cepheid Variables, Light Curve, Stellar Spectra, Supergiant Stars, Periodic Variations, Power Spectra, Spectrum Analysis, Ubv Spectra

Scientific paper

An analysis of the light-curves of the variable star CO Aur is presented to show that the object is a short-period Cepheid. The shapes of the V and (B-V) curves both display a rapid increase followed by a slow decline, typical of short-period Cepheids. They are also equal in phase. The observed double-mode pulsation occurs in the first and second overtone, which is unique among the 11 double-mode pulsation Cepheids thus far observed. A good agreement between evolutionary and beat mass has been observed.

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