|Article in PDF||
vol. 6, N 9 (2006)
Received: 16.03.2006; accepted: 16.03.2006
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|According to ASAS-3 data (Pojmanski et al., 2005), HD 288719, listed in the ASAS
of variable stars as a fundamental mode Cepheid, is actually a double-mode Cepheid.
The phased light curves plotted for the following elements:
HJD(max)=2453753.684+2.26571xE (fundamental mode) and
HJD(max)=2453724.711+1.61404xE (first overtone mode),
are given in the Figure. The period ratio P1/P0=0.712 is typical for beat Cepheids. ROTSE-I observations (NSVS 12488333, NSVS 12496743; Wozniak et al., 2004) are in agreement with the suggested classification and periods. However, I did not use the NSVS data for analysis and period determination because of the short interval and small number of good observations.
|Pojmanski, G., Pilecki, B., Szczygiel, D., 2005, Acta Astronomica, 55, 275
Wozniak, P.R., Vestrand, W.T., Akerlof, C.W. et al., 2004, Astron. J., 127, 2436
The phased light curves. Top panels: ASAS-3 data folded with the fundamental-mode and the first overtone periods. Bottom panels: the same curves after prewhitening the other oscillation; additionally, the frequency connected with the interaction mode (1/P1+1/P0, P=0.94254 d) has been whitened.