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Title: Dynamics of wind and the dusty environments in the accreting T Tauri stars RY Tauri and SU Aurigae
Authors: Petrov, P. P.
Grankin, K. N.
Gameiro, J. F.
Artemenko, S. A.
Babina, E. V.
De Albuquerque, R. M. G.
Djupvik, A. A.
Gahm, G. F.
Shenavrin, V. I.
Irsmambetova, T. R.
Fernandez, M.
Mkrtichian, D. E.
Gorda, S. Yu.
Issue Date: 2019
Publisher: Oxford University Press
Citation: Dynamics of wind and the dusty environments in the accreting T Tauri stars RY Tauri and SU Aurigae / P. P. Petrov, K. N. Grankin, J. F. Gameiro, et al. — DOI 10.1093/mnras/sty3066 // Monthly Notices of the Royal Astronomical Society. — 2019. — Vol. 483. — Iss. 1. — P. 132-146.
Abstract: Classical T Tauri stars with ages of less than 10 Myr possess accretion discs. Magnetohydro-dynamic processes at the boundary between the disc and the stellar magnetosphere control the accretion and ejections gas flows. We carried out a long series of simultaneous spectroscopic and photometric observations of the classical T Tauri stars, RY Tauri and SU Aurigae, with the aim to quantify the accretion and outflow dynamics at time-scales from days to years. It is shown that dust in the disc wind is the main source of photometric variability of these stars. In RY Tau, we observed a new effect: during events of enhanced outflow, the circumstellar extinction becomes lower. The characteristic time of changes in outflow velocity and stellar brightness indicates that the obscuring dust is near the star. The outflow activity in both stars is changing on a time-scale of years. Periods of quiescence in the variability of the Hα profile were observed during the 2015-2016 period in RY Tau and during the 2016-2017 period in SU Aur. We interpret these findings in the framework of the magnetospheric accretion model, and we discuss how the global stellar magnetic field can influence the long-term variations of the outflow activity. © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society
Keywords: HERBIG AE/BE
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85068359712
PURE ID: 9189335
ISSN: 358711
DOI: 10.1093/mnras/sty3066
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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