Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26as..132...39m&link_type=abstract
Astronomy and Astrophysics Supplement, v.132, p.39-43
Astronomy and Astrophysics
Astrophysics
4
Stars: Oscillations, Cepheids, Magellanic Clouds, Stars Hv 1353 (Smc), Hv 1777 (Smc), Hv 1779 (Smc)
Scientific paper
Accurate CCD observations of three Cepheids in the SMC were made with the purpose of confirming their nature of second overtone mode Cepheids. The stars were suspected pulsating in the second overtone mode owing to the unusual light curve and short period reported by Payne-Gaposchkin & Gaposchkin (1966\cite{pgg}). The analysis of the new data shows that for two stars the previous periods are wrong, and in the three cases the new light curves are normal. According to the new observations, HV 1353 is a fundamental mode pulsator with small amplitude, and HV 1777 and HV 1779 are first overtone mode pulsators. Also the star HV 1763, whose nature was unknown, was observed in the field of HV 1777. The new data show that it is a first overtone mode Cepheid with P=2fd 117. Based on observations collected at ESO--La Silla.
Antonello Elio
Mantegazza Luciano
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