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Wind dynamics and circumstellar extinction variations in the T Tauri star RY Tau

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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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Authors and Affiliations

  1. Crimean Astrophysical Observatory, Russian Academy of Sciences, p/o Nauchnyi, Crimea, 298409, Russia

    E. V. Babina, S. A. Artemenko & P. P. Petrov

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  1. E. V. Babina
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  2. S. A. Artemenko
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  3. P. P. Petrov
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Correspondence to P. P. Petrov.

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Original Russian Text © E.V. Babina, S.A. Artemenko, P.P. Petrov, 2016, published in Pis’ma v Astronomicheskii Zhurnal, 2016, Vol. 42, No. 3, pp. 221–231.

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Babina, E.V., Artemenko, S.A. & Petrov, P.P. Wind dynamics and circumstellar extinction variations in the T Tauri star RY Tau. Astron. Lett. 42, 193–203 (2016). https://doi.org/10.1134/S1063773716030014

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