Open AccessAccretion and wind modulation in T Tauri star RY Tau: a planet at 0.2 AU?
Author(s) -
S. A. Artemenko,
E. V. Babina,
K. N. Grankin,
П. П. Петров
Publication year - 2022
Publication title -
astronomy at the epoch of multimessenger studies. proceedings of the vak-2021 conference, aug 23–28, 2021
Language(s) - English
Resource type - Conference proceedings
DOI - 10.51194/vak2021.2022.1.1.036
Subject(s) - physics , planet , magnetosphere , accretion (finance) , astrophysics , accretion disc , magnetohydrodynamics , astronomy , magnetic field , quantum mechanics
Spectral and photometric monitoring of CTTS RY Tau in 2013–2021 revealed variations in the H α and Na i D lines atradial velocities of infall (accretion) and outow (wind) with a period of about 22 days. The Na i D absorption in theinfalling and outowing gas changes in anti-phase: an increase in the density of infalling gas is accompanied by a decreasein the wind density, and vice versa. The uctuations remain coherent for several years of observation. We assume that theobserved eect may be due to processes at the disk-magnetosphere boundary in MHD propeller mode. The stability of theoscillation phase indicates the possible presence of a massive planet, causing azimuthal asymmetry of the accretion andwind ows. If the observed period (22 days) is Keplerian, then the planet is located at a distance of 0.2 AU and moves withan orbital velocity of 100 km s −1 .