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

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

2002-03-06

arxiv.org/abs/astro-ph/0203078v1

Astronomy and Astrophysics

Astrophysics

4 pages (in A&A style), 3 eps figures. Accepted for A&A Letters

Scientific paper

10.1051/0004-6361:20020315

We report on the discovery of the second case of a galactic Cepheid, ASAS112843-5925.7=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.

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