EDP Sciences
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Volume 367, Number 3, March I 2001
Page(s) 759 - 769
Section Extragalactic astronomy
DOI http://dx.doi.org/10.1051/0004-6361:20000235

A&A 367, 759-769 (2001)
DOI: 10.1051/0004-6361:20000235

Variable stars in nearby galaxies

IV. Fields C and D of IC 1613
L. Mantegazza, E. Antonello, D. Fugazza, M. Bossi and S. Covino

Osservatorio Astronomico di Brera, Via E. Bianchi 46, 23807 Merate, Italy

(Received 23 October 2000 / Accepted 9 November 2000)

The nearby galaxies IC 1613 and NGC 6822 were observed over four years to detect short period Cepheids and to obtain good light curves for Fourier decomposition. The program was carried out with a relatively small telescope, the Dutch 0.9 m at ESO-La Silla, and the observations were performed without filter (white light), or Wh-band. In this paper we present the results of the observations of Fields C and D in IC 1613 $(3{\farcm}8\times3{\farcm}8$ each). The analysis of the light curves of 3297 stars in the two fields has allowed the detection of 92 variable stars. A total of 34 Population I Cepheids have been found, while only 7 of these objects were previously known in these fields. Most of the stars have short periods and some of them are first overtone mode pulsators. Among the other variable stars there are one eclipsing binary and five W Vir candidates. A nova event was observed in Field D.

Key words: stars: oscillations; Cepheids; novae -- stars: variables: general -- galaxies: individual: IC 1613 -- galaxies: stellar content

Offprint request: L. Mantegazza, luciano@merate.mi.astro.it

SIMBAD Objects in preparation
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© ESO 2001