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"Peremennye Zvezdy", Prilozhenie, vol. 6, N 9 (2006)

ASAS 062726+0111.6: a new Double-mode Cepheid

S. V. Antipin
Sternberg Astronomical Institute and Institute of Astronomy, Russian Academy of Sciences, Moscow, Russia

ISSN 2221–0474

Received:   16.03.2006;   accepted:   16.03.2006
(E-mail for contact: antipin@sai.msu.ru)

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Star Name: ASAS 062726+0111.6, HD 288719, BD+01 1350, TYC 0133 01103 1 Coordinates (J2000): 06 27 25.25, +01 11 32.5 Variability type: CEP(B);   Limits, System: 10.11-10.37 (V);   Spectrum: G0 Period: (see Remarks) d;   Epoch(max): JD (see Remarks)

Remarks:

According to ASAS-3 data (Pojmanski et al., 2005), HD 288719, listed in the ASAS catalog 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.

References:

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