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A hot story with many tales: the qWR star HD 45166. I- Observations and system parameters
J. E. Steiner, Alexandre Oliveira
The binary star HD 45166 has been observed since 1922 but its orbital period has not yet been found. It is considered a peculiar Wolf-Rayet star, and its assigned classification va…
Circular polarimetry of magnetic cataclysmic variables
Claudia V. Rodrigues, Deonisio Cieslinski, Francisco J. Jablonski +4
Magnetic cataclysmic variables are complex accreting binary systems with short orbital periods. Here we present circular polarimetry of five magnetic cataclysmic variable candidate…
The Spectroscopic Orbital Period of HD 45166
Alexandre S. Oliveira, J. E. Steiner
HD 45166 was selected as a candidate to the V Sagittae Class. It's spectrum shows quite narrow emission lines of He, C, N, and O, possibly indicating a low inclination for the bina…
Spectral mapping of the accretion flow of UU Aquarii
R. Baptista, C. Silveira, J. E. Steiner +1
Time-resolved spectroscopy of the novalike variable UU Aquarii is analyzed with eclipse mapping techniques to produce spatially resolved spectra of its accretion disc and gas strea…
Polarimetry and spectroscopy of the polar RX J1141.3-6410
C. V. Rodrigues, D. Cieslinski, J. E. Steiner
We present the first optical polarimetric measurements of RX J1141.3-6410 which confirm that star as a polar. The circular polarization varies between 0 and 13% with the orbital pe…