Now showing items 1-10 of 13
Long-term monitoring of polars
(Cambridge University Press, 2011-07)
We present long-term observations of magnetic cataclysmic variables AM Her, AN UMa, AR UMa, DP Leo, and V1309 Ori obtained with the ROTSEIIId telescope. All data have been analysed and preliminary results indicate periods ...
Close binary system GO Cyg
In this study, we present long term photometric variations of the close binary system GO Cyg. Modelling of the system shows that the primary is filling Roche lobe and the secondary of the system is almost filling its Roche ...
Mode identification in the high-amplitude δ Scuti star V2367 Cyg
(Oxford University Press, 2013)
We report on a multisite photometric campaign on the high-amplitude delta Scuti star V2367 Cyg in order to determine the pulsation modes. We also used high-dispersion spectroscopy to estimate the stellar parameters and ...
The short-period low-mass binary system CC Com revisited
(Wiley-VCH Verlag, 2011-07)
In this study we determined precise orbital and physical parameters of the very short-period low-mass contact binary system CC Com. The parameters are obtained by analysis of new CCD data combined with archival spectroscopic ...
Triple-star candidates among the Kepler binaries
(IOP Publishing, 2013-05)
We present the results of a search through the photometric database of Kepler eclipsing binaries looking for evidence of hierarchical triple-star systems. The presence of a third star orbiting the binary can be inferred ...
Marginally low mass ratio close binary system V1191 Cyg
In this study, we present photometric and spectroscopic variations of the extremely small mass ratio (q ≃ 0.1) late-type contact binary system V1191 Cyg. The parameters for the hot and cooler companions have been determined ...
Basic physical properties of the low-temperature contact binary system V781 Tau and the near-contact binary system V836 Cyg
(Oxford University Press, 2005-11)
We present a detailed photometric study of the low-temperature contact binary V781 Tau, and the near-contact binary V836 Cyg. We have combined the parameters obtained from the light-curve analysis with those found by the ...
Short and long time-scale variability in magnetic cataclysmic variables: Long-term monitoring of polars
(Oxford University Press, 2012-05)
We present long-term observations of the magnetic cataclysmic variables AM Her, AN UMa, AR UMa, DP Leo and V1309 Ori. Analyses of both short- and long-period light variations are presented. For the first time, as far as ...
Close binary and other variable stars in the solar-age galactic open cluster M67
(EDP Sciences, 2009-08)
We present multi-colour time-series CCD photometry of the solar-age galactic open cluster M67 (NGC 2682). About 3600 frames spread over 28 nights were obtained with the 1.5 m Russian-Turkish and 1.2 m Mercator telescopes. ...
Angular momentum loss in polars
(Cambridge University Press, 2009-08)
We discuss the possible angular momentum loss mechanisms in AM Her type cataclysmic variables and their corresponding mass loss rates using the observed physical parameters of them.