Wind dynamics and circumstellar extinction variations in the T Tauri star RY Tau
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.
- Publication:
-
Astronomy Letters
- Pub Date:
- March 2016
- DOI:
- 10.1134/S1063773716030014
- arXiv:
- arXiv:1602.04665
- Bibcode:
- 2016AstL...42..193B
- Keywords:
-
- variable stars;
- T Tauri stars;
- stellar wind;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 13 pages, 1 table, 8 figures. Accepted for publication in Astronomy Letters, 2016