Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/101946
Title: Dynamics of magnetic flux tubes and IR-variability of young stellar objects
Authors: Khaibrakhmanov, S. A.
Dudorov, A.
Sobolev, A.
Issue Date: 2018
Publisher: Institute of Physics Publishing
Citation: Khaibrakhmanov S. Dynamics of magnetic flux tubes and IR-variability of young stellar objects / S. Khaibrakhmanov, A. Dudorov, A. Sobolev. — DOI 10.1088/1674-4527/18/8/90 // Research in Astronomy and Astrophysics. — 2018. — Vol. 18. — Iss. 8. — 090.
Abstract: We simulate the dynamics of slender magnetic flux tubes (MFTs) in the accretion disks of T Tauri stars. The dynamical equations of our model take into account aerodynamic and turbulent drag forces, and the radiative heat exchange between the MFT and ambient gas. The structure of the disk is calculated with the help of our MHD model of the accretion disks. We consider the MFTs formed at distances of 0.027-0.8 au from the star with various initial radii and plasma betas β 0. The simulations show that MFTs with a weak magnetic field (β 0 = 10) rise slowly with speeds less than the speed of sound. MFTs with β 0 = 1 form an outflowing magnetized corona above the disk. Strongly magnetized MFTs (β 0 = 0.1) can cause outflows with velocities 20 - 50 km s-1. The tubes rise periodically over times from several days to several months according to our simulations. We propose that periodically rising MFTs can absorb stellar radiation and contribute to the IR-variability of young stellar objects. © 2018 National Astronomical Observatories, CAS and IOP Publishing Ltd..
Keywords: ACCRETION DISKS
INSTABILITIES
MAGNETOHYDRODYNAMICS (MHD)
PROTOPLANETARY DISKS
URI: http://hdl.handle.net/10995/101946
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85051504825
PURE ID: 7760088
df76b98e-769f-431e-994e-48f2004d1a04
ISSN: 16744527
DOI: 10.1088/1674-4527/18/8/90
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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