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Astron. Astrophys. 350, L55-L56 (1999)

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Letter to the Editor

EV Sct - a double system with two Cepheid components in NGC 6664?

V.V. Kovtyukh and S.M. Andrievsky

Odessa State University, Department of Astronomy, Shevchenko Park, 270014 Odessa, Ukraine (scan@deneb.odessa.ua)

Received 30 August 1999 / Accepted 21 September 1999


Spectroscopic manifestations of the s-Cepheid EV Sct binarity are reported. All the lines in the spectrum of this faint Cepheid are strongly asymmetrical or even splitted indicating that this system consists of two components. Both components have close effective temperatures, the difference in the visual magnitudes seems to be not great. Together with the preliminary results of the frequency analysis based on the published photometrical data, this means that the secondary component is probably also situated within the instability strip, being a very short-period Cepheid ([FORMULA] 1.2 day)

Key words: stars: binaries: spectroscopic – stars: individual: EV Sct

Send offprint requests to: S.M. Andrievsky

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© European Southern Observatory (ESO) 1999

Online publication: October 14, 1999