Open AccessRotation measure and vertical structure of accretion disks
Author(s) -
Mikhail A. Buldakov,
E. O. Vasiliev,
A. S. Andrianov
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/vak2021.2022.1.1.102
Subject(s) - physics , turbulence , magnetohydrodynamics , dynamo , magnetohydrodynamic turbulence , magnetohydrodynamic drive , measure (data warehouse) , rotation (mathematics) , range (aeronautics) , sign (mathematics) , magnetic field , computational physics , mechanics , geometry , mathematics , mathematical analysis , materials science , quantum mechanics , database , computer science , composite material
Rotation measure (RM) can give information about properties of magnetohydrodynamic (MHD) turbulence in accretiondisks. RM measured in observations is averaged by large volumes and it may have complicated alternating-sign structure.We study possible relations between RM and properties of turbulence in disks. We numerically simulate development ofMRI turbulence in a local fragment of disk. Evolution and spatial distribution of α-parameter, vertical mass ux and RMare studied for two initial magnetic eld congurations and values of initial midplane plasma β 0 (ratio of gas pressure tomagnetic pressure) in range 10 0 − 10 3 . The pairwise correlations between α parameter, vertical mass ux and RM arecalculated. The values of correlation levels are in range 0.50-0.95. It shows that oscillations of RM roughly correspond tooscillations of α and vertical mass ux. The period of these oscillations is approximately equal to the one of dynamo cycle.