Highly Efficient Modeling of Dynamic Coronal Loops
| dc.contributor.author | Cargill, J. A. Klimchuk | en |
| dc.contributor.author | S. Patsourakos | en |
| dc.contributor.author | P. J. | en |
| dc.date.accessioned | 2015-11-24T18:27:22Z | |
| dc.date.available | 2015-11-24T18:27:22Z | |
| dc.identifier.issn | 0004-637X | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/16025 | |
| dc.rights | Default Licence | - |
| dc.title | Highly Efficient Modeling of Dynamic Coronal Loops | en |
| heal.abstract | Observational and theoretical evidence suggests that coronal heating is impulsive and occurs on very small cross-field spatial scales. A single coronal loop could contain a hundred or more individual strands that are heated quasi-independently by nanoflares. It is therefore an enormous undertaking to model an entire active region or the global corona. Three-dimensional MHD codes have inadequate spatial resolution, and one-dimensional (1D) hydrodynamic codes are too slow to simulate the many thousands of elemental strands that must be treated in a reasonable representation. Fortunately, thermal conduction and flows tend to smooth out plasma gradients along the magnetic field, so zero-dimensional (0D) models are an acceptable alternative. We have developed a highly efficient model called "enthalpy-based thermal evolution of loops" (EBTEL), which accurately describes the evolution of the average temperature, pressure, and density along a coronal strand. It improves significantly on earlier models of this type in accuracy, flexibility, and capability. It treats both slowly varying and highly impulsive coronal heating; it provides the time-dependent differential emission measure distribution, DEM( T ), at the transition region footpoints; and there are options for heat flux saturation and nonthermal electron beam heating. EBTEL gives excellent agreement with far more sophisticated 1D hydrodynamic simulations despite using 4 orders of magnitude less computing time. It promises to be a powerful new tool for solar and stellar studies. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.secondary | http://stacks.iop.org/0004-637X/682/i=2/a=1351 | - |
| heal.journalName | The Astrophysical Journal | en |
| heal.journalType | peer reviewed | - |
| heal.publicationDate | 2008 | - |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών | el |
| heal.type | journalArticle | - |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.type.en | Journal article | en |
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