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A study of the magnetic field in FK Com |
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| Authors: | V B Puzin I S Savanov I I Romanyuk E A Semenko E S Dmitrienko |
| Institution: | 1. Institute of Astronomy, Russian Academy of Sciences, Moscow, 119017, Russia 2. Special Astrophysical Observatory, Russian Academy of Sciences, Nizhnii Arkhyz, 369167, Russia 3. Sternberg Astronomical Institute, Lomonosov Moscow State University, Moscow, 119992, Russia |
| Abstract: | We present the results of our new spectropolarimetric observations of FKCom aimed to measure the longitudinal component B z of its magnetic field. The most interesting interpretation of our results suggests that the B z value has significantly decreased compared to the 2008 observations of this star. Such a decrease of the longitudinal component of the magnetic field can be similar to the secular variations of B z registered earlier for another chromospherically active star II Peg. On the other hand, assuming the existence of B z variations with the rotation phase, we suggest that the variations of the phase curve B z from 2008 to 2012 originated because of the strengthening of the negative polarity spot, its domination, and as a result-a generally more symmetric distribution of magnetic regions. |
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