Artículo
Abstract:
We develop and analyze a simple cellular automaton model that reproduces the main properties of the evolution of soft X-ray coronal loops. We are motivated by the observation that these loops evolve in three distinguishable phases that suggest the development, maintenance, and decay of a self-organized system. The model is based on the idea that loops are made of elemental strands that are heated by the relaxation of magnetic stress in the form of nanoflares. In this vision, usually called the "Parker conjecture," the origin of stress is the displacement of the strand footpoints due to photospheric convective motions. Modeling the response and evolution of the plasma we obtain synthetic light curves that have the same characteristic properties (intensity, fluctuations, and timescales) as the observed cases.We study the dependence of these properties on the model parameters and find scaling laws that can be used as observational predictions of the model. We discuss the implications of our results for the interpretation of recent loop observations in different wavelengths. © 2010. The American Astronomical Society. All rights reserved.
Registro:
| Documento: | Artículo |
| Título: | A simple model for the evolution of multi-stranded coronal loops |
| Autor: | López Fuentes, M.C.; Klimchuk, J.A. |
| Filiación: | Instituto de Astronomía y Física Del Espacio, CONICET-UBA, CC. 67, Suc. 28, 1428 Buenos Aires, Argentina NASA Goddard Space Flight Center, Code 671, Greenbelt, MD 20771, United States |
| Palabras clave: | Sun: Corona; Sun: Flares; Sun: Magnetic topology; Sun: X-rays gamma rays |
| Año: | 2010 |
| Volumen: | 719 |
| Número: | 1 |
| Página de inicio: | 591 |
| Página de fin: | 601 |
| DOI: | http://dx.doi.org/10.1088/0004-637X/719/1/591 |
| Título revista: | Astrophysical Journal |
| Título revista abreviado: | Astrophys. J. |
| ISSN: | 0004637X |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v719_n1_p591_LopezFuentes |
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Citas:
---------- APA ----------
López Fuentes, M.C. & Klimchuk, J.A. (2010) . A simple model for the evolution of multi-stranded coronal loops. Astrophysical Journal, 719(1), 591-601.http://dx.doi.org/10.1088/0004-637X/719/1/591
---------- CHICAGO ----------
López Fuentes, M.C., Klimchuk, J.A. "A simple model for the evolution of multi-stranded coronal loops" . Astrophysical Journal 719, no. 1 (2010) : 591-601.http://dx.doi.org/10.1088/0004-637X/719/1/591
---------- MLA ----------
López Fuentes, M.C., Klimchuk, J.A. "A simple model for the evolution of multi-stranded coronal loops" . Astrophysical Journal, vol. 719, no. 1, 2010, pp. 591-601.http://dx.doi.org/10.1088/0004-637X/719/1/591
---------- VANCOUVER ----------
López Fuentes, M.C., Klimchuk, J.A. A simple model for the evolution of multi-stranded coronal loops. Astrophys. J. 2010;719(1):591-601.http://dx.doi.org/10.1088/0004-637X/719/1/591
