Acoustic emission from magnetic flux tubes in the solar network

Eclipse on the Coral Sea: Cycle 24 Ascending

物理学;天文学

Vigeesh, G.^1 ; Hasan, S.S.^2

Department of Astronomy, New Mexico State University, Las Cruces, NM, United States^1

Indian Institute of Astrophysics, Koramangala, Bangalore, India^2

关键词: Acoustic energy fluxes;    Ambient medium;    Coronal heating;    Magnetic field parameter;    Magnetic flux tube;    Magnetic networks;    Photospheric motions;    Three-dimensional numerical simulations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/440/1/012045/pdf
DOI  :  10.1088/1742-6596/440/1/012045

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

We present the results of three-dimensional numerical simulations to investigate the excitation of waves in the magnetic network of the Sun due to footpoint motions of a magnetic flux tube. We consider motions that typically mimic granular buffeting and vortex flows and implement them as driving motions at the base of the flux tube. The driving motions generates various MHD modes within the flux tube and acoustic waves in the ambient medium. The response of the upper atmosphere to the underlying photospheric motion and the role of the flux tube in channeling the waves is investigated. We compute the acoustic energy flux in the various wave modes across different boundary layers defined by the plasma and magnetic field parameters and examine the observational implications for chromospheric and coronal heating.