134 citations
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6 papers · 1 filter
The contact binary GSC 04778-00152 with a visual companion
T. Tuvikene, T. Eenmäe, C. Sterken +1
Photometric and spectroscopic observations of the unstudied 12th-magnitude eclipsing binary GSC 04778-00152 are presented. We report the discovery of a visual companion about 1 mag…
IP Pegasi in outburst: Echelle spectroscopy & Modulation Doppler Tomography
C. Papadaki, H. M. J. Boffin, D. Steeghs
We analyse a unique set of time-resolved echelle spectra of the dwarf nova IP Peg, obtained at ESO's NTT with EMMI. The dataset covers the wavelength range of 4000-7500A and shows…
Photometric study of selected cataclysmic variables II. Time-series photometry of nine systems
C. Papadaki, H. M. J. Boffin, V. Stanishev +3
We present time-series photometry of nine cataclysmic variables: EI UMa, V844Her, V751 Cyg, V516 Cyg, GZ Cnc, TY Psc, V1315 Aql, ASAS J002511+1217.12, V1315 Aql and LN UMa. The obs…
On the origin and evolutionary state of RZ Cas, KO Aql and S Equ
N. Mennekens, J. -P. De Greve, W. Van Rensbergen +1
Aims. Determination of the present evolutionary state and the restrictions on the initial mass ratios of RZ Cas, KO Aql and S Equ. Methods. Comparison of mass gaining stars with ev…
Multisite campaign on the open cluster M67. II. Evidence for solar-like oscillations in red giant stars
D. Stello, H. Bruntt, H. Kjeldsen +19
Measuring solar-like oscillations in an ensemble of stars in a cluster, holds promise for testing stellar structure and evolution more stringently than just fitting parameters to s…
Simultaneous Doppler maps of IP Peg in outburst
C. Papadaki, H. M. J. Boffin, D. Steeghs
IP Pegasi is an eclipsing dwarf nova lying above the period gap with an orbital period of 3.8h. It is the first cataclysmic variable to show evidence of spiral arms in its accretio…