Projects per year
Abstract
We perform MHD modeling of a single bright coronal loop to include the interaction with a non-uniform magnetic field. The field is stressed by random footpoint rotation in the central region and its energy is dissipated into heating by growing currents through anomalous magnetic diffusivity that switches on in the corona above a current density threshold. We model an entire single magnetic flux tube, in the solar atmosphere extending from the high-beta chromosphere to the low-betacorona through the steep transition region. The magnetic field expands from the chromosphere to the corona. The maximum resolution is ~30 km. We obtain an overall evolution typical of loop models and realistic loop emission in the EUV and X-ray bands. The plasma confined in the fluxtube is heated to active region temperatures (~3 MK) after ~2/3 hr. Upflows from the chromosphere up to ~100 km/s fill the core of the fluxtube to densities above 109 cm-3. More heating is released in the low corona than the high corona and is finely structured both in space and time.
Original language | English |
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Article number | 21 |
Number of pages | 15 |
Journal | Astrophysical Journal |
Volume | 830 |
Issue number | 1 |
Early online date | 4 Oct 2016 |
DOIs | |
Publication status | Published - 10 Oct 2016 |
Keywords
- Sun: corona
- Sun: activity
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Dive into the research topics of '3D MHD modeling of twisted coronal loops'. Together they form a unique fingerprint.Projects
- 2 Finished
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Solar and Magnetospheric - Consolidated: Solar and Magnetospheric Magnetohydrodynamics and Plasmas: Theory and Application
Hood, A. W. (PI), Archontis, V. (CoI), De Moortel, I. (CoI), Mackay, D. H. (CoI), Neukirch, T. (CoI), Parnell, C. E. (CoI) & Wright, A. N. (CoI)
Science & Technology Facilities Council
1/04/16 → 31/03/19
Project: Standard
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Local Coronal Dynamics: Local Coronal Dynamics
Hood, A. W. (PI), De Moortel, I. (CoI), Parnell, C. E. (CoI) & Priest, E. (CoI)
1/11/13 → 31/03/15
Project: Standard