A study of the distortion wave in the RS CVn eclipsing binary SV Camelopardalis |
| |
Authors: | C V S R Sarma P Vivekananda Rao M B K Sarma |
| |
Institution: | (1) Centre for Advanced Study in Astronomy, Osmania University, 500007 Hyderabad |
| |
Abstract: | The light outside the eclipses of the totally eclipsing RS CVn binary SV Camelopardalis (SV Cam) is Fourier analysed and the
amplitudes of the distortion waves have been derived. The distribution of the percentage contributions of these amplitudes
inV, B andU colours with respect to the luminosities of the binary components indicates that the hotter component is the source of the
distortion waves. These distortion waves, attributed to star spots, are modelled according to Budding (1977) and spot parameters
like longitude, latitude, temperature and size are obtained. From this study it is noticed that while symmetric waves with
two minima could be fitted satisfactorily, asymmetric waves with more than two minima could not be fitted well. From the longitudes
of the minima of the best fitted curves, migration periods of four spot groups are determined. Assuming synchronism between
rotation and orbital periods, the rotation periods of the four spot groups are derived from their migration periods. The period
of rotation of one of the spot groups having direct motion is found to be 0d.5934209 while the periods of the other three spot groups having retrograde motion are 0d.5926588, 0d.592607 and 0d.5924688. As the latitudes of these spots are known from modelling parameters, the latitude having a rotation period equal
to that of the orbital period (co-rotating latitude) is found to be about 30° |
| |
Keywords: | eclipsing binaries star spots RS CVn stars stars individual |
本文献已被 SpringerLink 等数据库收录! |
|