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RZ Cassiopeia: an Eclipsing Binary with a Pulsating Component

Published online by Cambridge University Press:  09 August 2007

Alex Golovin  and
Elena P. Pavlenko
Alex Golovin
Affiliation:
Main Astronomical Observatory of NAS of Ukraine; Zabolotnoho str., 27, Kyiv, 03680, UkraineKyiv National Taras Shevchenko University, Volodymyrska Street, 64, Kyiv, 01033, Ukraine; Visiting astronomer of the Crimean Astrophysical Observatory, Nauchny, Crimea, Ukraine email: [email protected]
Elena P. Pavlenko
Affiliation:
Crimean Astrophysical Observatory, p/o Nauchny 19/17, Crimea, 98409, Ukraine
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Abstract

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We report time-resolved V- and R-band CCD photometry of the eclipsing binary RZ Cas obtained with 38-cm Cassegrain telescope at the Crimean Astrophysical Observatory during July 2004 – October 2005. The obtained lightcurves clearly demonstrates rapid pulsations with a period of about 22 min. A periodogram analysis of these oscillations is also reported. On 12 January, 2005 (JD 2453383) we observed rapid variability with higher amplitude (∼0m.1), that perhaps may be interpreted as a high-mass-transfer-rate event and inhomogeneity of the accretion stream. Follow-up observations (both photometric and spectroscopic) of RZ Cas are strictly desirable for more detailed study of such events.

Keywords

(stars:) binaries: eclipsingstars: individual (RZ Cas, GSC 04317-01793, HD 17138)stars: mass lossstars: oscillations(stars: variables:) delta Scutistars: variables: other
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S240: Binary Stars as Critical Tools & Tests in Contemporary Astrophysics , August 2006 , pp. 641 - 644
Copyright
Copyright © International Astronomical Union 2007

References

Golovin, A. & Pavlenko, E. 2006, JAAVSO, vol. 34, in pressGoogle Scholar
Stellingwerf, R.F. 1978, ApJ, 224, 953 CrossRefGoogle Scholar