Wind dynamics and circumstellar extinction variations in the T Tauri star RY Tau |
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Authors: | E V Babina S A Artemenko P P Petrov |
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Institution: | 1.Crimean Astrophysical Observatory,Russian Academy of Sciences,Crimea,Russia |
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Abstract: | The wind interaction with the dusty environment of the classical T Tauri star RY Tau has been investigated. During two seasons from 2013 to 2015, we carried out a spectroscopicmonitoring of this star with simultaneous BV R photometry. A correlation between the stellar brightness and the radial velocity of the wind determined from the Hα and Na D line profiles has been found. The irregular stellar brightness variations are shown to be caused by extinction in a dusty disk wind at a distance of about 0.2 AU from the star. We hypothesize that the circumstellar extinction variations result from a cyclic rearrangement of the magnetosphere and coronal mass ejections, which affect the dusty disk wind near the inner boundary of the circumstellar disk. |
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