A global wave-driven magnetohydrodynamic solar model with a unified treatment of open and closed magnetic field topologies

Oran, R.; Van der Holst, B.; Landi, E.; Jin, M.; Sokolov, I. V.

doi:10.1088/0004-637X/778/2/176

Title: A global wave-driven magnetohydrodynamic solar model with a unified treatment of open and closed magnetic field topologies

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Abstract

We describe, analyze, and validate the recently developed Alfvén Wave Solar Model, a three-dimensional global model starting from the top of the chromosphere and extending into interplanetary space (out to 1-2 AU). This model solves the extended, two-temperature magnetohydrodynamics equations coupled to a wave kinetic equation for low-frequency Alfvén waves. In this picture, heating and acceleration of the plasma are due to wave dissipation and to wave pressure gradients, respectively. The dissipation process is described by a fully developed turbulent cascade of counterpropagating waves. We adopt a unified approach for calculating the wave dissipation in both open and closed magnetic field lines, allowing for a self-consistent treatment in any magnetic topology. Wave dissipation is the only heating mechanism assumed in the model; no geometric heating functions are invoked. Electron heat conduction and radiative cooling are also included. We demonstrate that the large-scale, steady state (in the corotating frame) properties of the solar environment are reproduced, using three adjustable parameters: the Poynting flux of chromospheric Alfvén waves, the perpendicular correlation length of the turbulence, and a pseudoreflection coefficient. We compare model results for Carrington rotation 2063 (2007 November-December) with remote observations in the extreme-ultraviolet and X-ray ranges from the Solar Terrestrialmore »« less

Authors:: Oran, R.; Van der Holst, B.; Landi, E.; Jin, M.; Sokolov, I. V.

Publication Date:: Sun Dec 01 00:00:00 EST 2013

OSTI Identifier:: 22341906

Resource Type:: Journal Article

Journal Name:: Astrophysical Journal

Additional Journal Information:: Journal Volume: 778; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X

Country of Publication:: United States

Language:: English

Subject:: 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCELERATION; ALFVEN WAVES; CHROMOSPHERE; COMPUTERIZED SIMULATION; CORRELATIONS; EXTREME ULTRAVIOLET RADIATION; INTERPLANETARY SPACE; KINETIC EQUATIONS; MAGNETIC FIELDS; MAGNETOHYDRODYNAMICS; ORBITS; PLASMA; SOLAR WIND; STAR MODELS; SUN; THERMAL CONDUCTION; THREE-DIMENSIONAL CALCULATIONS; TURBULENCE; X RADIATION

Citation Formats


                    Oran, R., Van der Holst, B., Landi, E., Jin, M., Sokolov, I. V., and Gombosi, T. I., E-mail: oran@umich.edu. A global wave-driven magnetohydrodynamic solar model with a unified treatment of open and closed magnetic field topologies.  United States: N. p., 2013. 
        Web.  doi:10.1088/0004-637X/778/2/176.

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                    Oran, R., Van der Holst, B., Landi, E., Jin, M., Sokolov, I. V., & Gombosi, T. I., E-mail: oran@umich.edu. A global wave-driven magnetohydrodynamic solar model with a unified treatment of open and closed magnetic field topologies.  United States.  https://doi.org/10.1088/0004-637X/778/2/176

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                    Oran, R., Van der Holst, B., Landi, E., Jin, M., Sokolov, I. V., and Gombosi, T. I., E-mail: oran@umich.edu. 2013.  
        "A global wave-driven magnetohydrodynamic solar model with a unified treatment of open and closed magnetic field topologies".  United States.  https://doi.org/10.1088/0004-637X/778/2/176.

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@article{osti_22341906,

  title        = {A global wave-driven magnetohydrodynamic solar model with a unified treatment of open and closed magnetic field topologies},

  author       = {Oran, R. and Van der Holst, B. and Landi, E. and Jin, M. and Sokolov, I. V. and Gombosi, T. I., E-mail: oran@umich.edu},

  abstractNote = {We describe, analyze, and validate the recently developed Alfvén Wave Solar Model, a three-dimensional global model starting from the top of the chromosphere and extending into interplanetary space (out to 1-2 AU). This model solves the extended, two-temperature magnetohydrodynamics equations coupled to a wave kinetic equation for low-frequency Alfvén waves. In this picture, heating and acceleration of the plasma are due to wave dissipation and to wave pressure gradients, respectively. The dissipation process is described by a fully developed turbulent cascade of counterpropagating waves. We adopt a unified approach for calculating the wave dissipation in both open and closed magnetic field lines, allowing for a self-consistent treatment in any magnetic topology. Wave dissipation is the only heating mechanism assumed in the model; no geometric heating functions are invoked. Electron heat conduction and radiative cooling are also included. We demonstrate that the large-scale, steady state (in the corotating frame) properties of the solar environment are reproduced, using three adjustable parameters: the Poynting flux of chromospheric Alfvén waves, the perpendicular correlation length of the turbulence, and a pseudoreflection coefficient. We compare model results for Carrington rotation 2063 (2007 November-December) with remote observations in the extreme-ultraviolet and X-ray ranges from the Solar Terrestrial Relations Observatory, Solar and Heliospheric Observatory, and Hinode spacecraft and with in situ measurements by Ulysses. The results are in good agreement with observations. This is the first global simulation that is simultaneously consistent with observations of both the thermal structure of the lower corona and the wind structure beyond Earth's orbit.},

  doi          = {10.1088/0004-637X/778/2/176},

  url          = {https://www.osti.gov/biblio/22341906},
  journal      = {Astrophysical Journal},

  issn         = {0004-637X},

  number       = 2,

  volume       = 778,

  place        = {United States},

  year         = {Sun Dec 01 00:00:00 EST 2013},

  month        = {Sun Dec 01 00:00:00 EST 2013}

}

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