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Absolute parameters and period variation in a semidetached eclipsing variable V2247 Cyg

Volkov, I. M.; Ikonnikova, N. P.; Burlak, M. A.

We aim to determine the absolute parameters of the components of a poorly studied Algol-type eclipsing binary V2247 Cyg. The data analysis is based on our numerous precise UBVRcIc photometric observations and low resolution spectra. The photometric solution reveals a semi-detached configuration with a less-massive component filling its Roche lobe.…

Rotational properties of magnetic chemically peculiar stars

Paunzen, E.; Bernhard, K.; Hümmerich, S. +1 more

The magnetic chemically peculiar (mCP) stars of the upper main sequence exhibit strong and globally organized magnetic fields that are inclined to the rotational axis and facilitate the development of surface abundance inhomogeneities resulting in photometric and spectroscopic variability. Photometric time series data are much easier to obtain tha…