EDP Sciences
Free access
Volume 386, Number 1, April IV 2002
Page(s) L9 - L12
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:20020315

A&A 386, L9-L12 (2002)
DOI: 10.1051/0004-6361:20020315


HD 304373, the second case of 1O/2O double-mode Cepheid in the Galaxy

M. Beltrame and E. Poretti

Università degli Studi, Dipartimento di Fisica, Milano, Italy

(Received 28 January 2002 / Accepted 1 March 2002)

We report on the discovery of the second case of a galactic Cepheid, ASAS 112843 -5925.7 $\equiv$HD 304373, pulsating in the the first (1O) and second (2O) radial overtones. The ratio between the periods (0.8058), the short value of the 1O period (0.922405 d) and the shape of the 1O light curve makes HD 304373 very similar to the 1O/2O Cepheids in the Magellanic Clouds. The implications of a so close similarity between a galactic 1O/2O pulsator and LMC ones are discussed in terms of importance of the metallicity effects.

Key words: methods: data analysis -- stars: oscillations -- Cepheids -- techniques: photometric -- stars: individual: HD 304373

Offprint request: E. Poretti, poretti@merate.mi.astro.it

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