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 of 2013-2015 we carried out a spectroscopic and photometric (BVR) monitoring of the star. A correlation between the stellar brightness and the radial velocity of the wind determined from the H-alpha and Na D line profiles has been found for the first time. 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 suppose, that variations of the circumstellar extinction results from cyclic rearrangements of the stellar magnetosphere and coronal mass ejections, which affect the dusty disk wind near the inner boundary of the circumstellar disk.

arXiv comment13 pages, 1 table, 8 figures. Accepted for publication in Astronomy Letters, 2016

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Cited by in corpus (5)

• The inner disk of RY Tau: evidence of stellar occultation by the disk atmosphere at the sublimation rim from K-band continuum interferometry
• Disk Evolution Study Through Imaging of Nearby Young Stars (DESTINYS): Scattered light detection of a possible disk wind in RY Tau
• Modulated accretion in T Tauri star RY Tau -- stable MHD propeller or a planet at 0.2 AU?
• Ejection Patterns in the DG Tau Jet Over the Last 40 Years: Insights into Mass Accretion Variability
• The MATISSE view of the inner region of the RY Tau protoplanetary disk