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Astron. Astrophys. 343, 385-388 (1999)


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The light curves of the short-period variable stars in the Carina dwarf Spheroidal galaxy

E. Poretti

Osservatorio Astronomico di Brera, Via Bianchi 46, I-23807 Merate, Italy (poretti@merate.mi.astro.it)

Received 16 November 1998 / Accepted 15 December 1998

Abstract

The light curves of the high-amplitude, short-period variable stars discovered by Mateo et al. (1998) in the Carina dwarf Spheroidal Galaxy were re-analyzed to refine their properties and compare them with those of galactic stars. In spite of a different pulsation mode established by means of different PLM relationships, the Fourier parameters did not reveal a separation between the two groups; however, they are slightly different from those of galactic stars. The possibility that some of these stars are double-mode pulsators is suggested.

Key words: methods: data analysis – stars: luminosity function, mass function – stars: oscillations – stars: variables: ffi Sct – galaxies: dwarf – galaxies: individual: Carina dwarf Spheroidal

Send offprint requests to: E. Poretti

© European Southern Observatory (ESO) 1999

Online publication: March 1, 1999

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