Artículo

Mac Cormack, C.; Vásquez, A.M.; López Fuentes, M.; Nuevo, F.A.; Landi, E.; Frazin, R.A. "Energy input flux in the global quiet-sun corona" (2017) Astrophysical Journal. 843(1)
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Abstract:

We present first results of a novel technique that provides, for the first time, constraints on the energy input flux at the coronal base (r ∼ 1.025 R o) of the quiet Sun at a global scale. By combining differential emission measure tomography of EUV images, with global models of the coronal magnetic field, we estimate the energy input flux at the coronal base that is required to maintain thermodynamically stable structures. The technique is described in detail and first applied to data provided by the Extreme Ultraviolet Imager instrument, on board the Solar TErrestrial RElations Observatory mission, and the Atmospheric Imaging Assembly instrument, on board the Solar Dynamics Observatory mission, for two solar rotations with different levels of activity. Our analysis indicates that the typical energy input flux at the coronal base of magnetic loops in the quiet Sun is in the range ∼0.5-2.0 105 (erg s-1 cm-2), depending on the structure size and level of activity. A large fraction of this energy input, or even its totality, could be accounted for by Alfvén waves, as shown by recent independent observational estimates derived from determinations of the non-thermal broadening of spectral lines in the coronal base of quiet-Sun regions. This new tomography product will be useful for the validation of coronal heating models in magnetohydrodinamic simulations of the global corona. © 2017. The American Astronomical Society. All rights reserved.

Registro:

Documento: Artículo
Título:Energy input flux in the global quiet-sun corona
Autor:Mac Cormack, C.; Vásquez, A.M.; López Fuentes, M.; Nuevo, F.A.; Landi, E.; Frazin, R.A.
Filiación:Instituto de Astronomía y Física Del Espacio (IAFE), CONICET-UBA, CC 67 - Suc 28, (C1428ZAA), Ciudad Autónoma de Buenos Aires, Argentina
Departamento de Física, Facultad de Ciencias Exactas y Naturales (FCEN), Universidad de Buenos Aires (UBA), Pabellón I, Ciudad Universitaria, (C1428ZAA), Ciudad Autónoma de Buenos Aires, Argentina
Departamento de Ciencia y Tecnología, Universidad Nacional de Tres de Febrero (UNTREF), Valentín Gómez 4752, (B1678ABH), Caseros, Provincia de Buenos Aires, Argentina
Department of Climate and Space Sciences and Engineering (CLaSP), University of Michigan, 2455 Hayward Street, Ann Arbor, MI 48109-2143, United States
Palabras clave:Sun: corona; Sun: fundamental parameters; Sun: magnetic fields; Sun: UV radiation
Año:2017
Volumen:843
Número:1
DOI: http://dx.doi.org/10.3847/1538-4357/aa76e9
Título revista:Astrophysical Journal
Título revista abreviado:Astrophys. J.
ISSN:0004637X
Registro:http://digital.bl.fcen.uba.ar/collection/paper/document/paper_0004637X_v843_n1_p_MacCormack

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Citas:

---------- APA ----------
Mac Cormack, C., Vásquez, A.M., López Fuentes, M., Nuevo, F.A., Landi, E. & Frazin, R.A. (2017) . Energy input flux in the global quiet-sun corona. Astrophysical Journal, 843(1).
http://dx.doi.org/10.3847/1538-4357/aa76e9
---------- CHICAGO ----------
Mac Cormack, C., Vásquez, A.M., López Fuentes, M., Nuevo, F.A., Landi, E., Frazin, R.A. "Energy input flux in the global quiet-sun corona" . Astrophysical Journal 843, no. 1 (2017).
http://dx.doi.org/10.3847/1538-4357/aa76e9
---------- MLA ----------
Mac Cormack, C., Vásquez, A.M., López Fuentes, M., Nuevo, F.A., Landi, E., Frazin, R.A. "Energy input flux in the global quiet-sun corona" . Astrophysical Journal, vol. 843, no. 1, 2017.
http://dx.doi.org/10.3847/1538-4357/aa76e9
---------- VANCOUVER ----------
Mac Cormack, C., Vásquez, A.M., López Fuentes, M., Nuevo, F.A., Landi, E., Frazin, R.A. Energy input flux in the global quiet-sun corona. Astrophys. J. 2017;843(1).
http://dx.doi.org/10.3847/1538-4357/aa76e9