Artículo
Abstract:
We present results derived from a dual-spacecraft tomographic reconstruction of the solar corona's three-dimensional (3D) extreme ultraviolet (EUV) emissivity. We use simultaneously taken STEREO A and B spacecraft EUVI images from Carrington rotation 2077 (UT 2008 November 20 06:56 through UT December 17 14:34). During this period, the spacecraft view angles were separated by an average 854 which allowed for the reconstruction to be performed with data gathered in about 3/4 of a full solar rotational time. The EUV reconstructions provide the 3D emissivity in each of the three EUVI Fe bands, in the range of heights 1.00-1.25R s. We use this information to perform local differential emission measure (LDEM) analysis. Taking moments of the so-derived LDEM distributions gives the 3D values of the electron density, temperature, and temperature spread. We determine relationships between the moments of the LDEM and the coronal magnetic field by making longitudinal averages of the moments, and relating them to the global-scale structures of a potential field source surface magnetic field model. In this way, we determine how the electron density, mean temperature, and temperature spread vary for different coronal structures. We draw conclusions about the relationship between the LDEM moments and the sources of the fast and slow solar winds, and the transition between the two regimes. © 2010. The American Astronomical Society. All rights reserved.
Registro:
| Documento: | Artículo |
| Título: | The solar minimum corona from differential emission measure tomography |
| Autor: | Vásquez, A.M.; Frazin, R.A.; Manchester IV, W.B. |
| Filiación: | Instituto de Astronomía y Física Del Espacio, CONICET, University of Buenos Aires, Ciudad de Buenos Aires, CC 67-Suc 28, Argentina Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, MI 48109, United States |
| Palabras clave: | Solar wind; Sun: activity; Sun: corona; Sun: magnetic topology |
| Año: | 2010 |
| Volumen: | 715 |
| Número: | 2 |
| Página de inicio: | 1352 |
| Página de fin: | 1365 |
| DOI: | http://dx.doi.org/10.1088/0004-637X/715/2/1352 |
| Título revista: | Astrophysical Journal |
| Título revista abreviado: | Astrophys. J. |
| ISSN: | 0004637X |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v715_n2_p1352_Vasquez |
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Citas:
---------- APA ----------
Vásquez, A.M., Frazin, R.A. & Manchester IV, W.B. (2010) . The solar minimum corona from differential emission measure tomography. Astrophysical Journal, 715(2), 1352-1365.http://dx.doi.org/10.1088/0004-637X/715/2/1352
---------- CHICAGO ----------
Vásquez, A.M., Frazin, R.A., Manchester IV, W.B. "The solar minimum corona from differential emission measure tomography" . Astrophysical Journal 715, no. 2 (2010) : 1352-1365.http://dx.doi.org/10.1088/0004-637X/715/2/1352
---------- MLA ----------
Vásquez, A.M., Frazin, R.A., Manchester IV, W.B. "The solar minimum corona from differential emission measure tomography" . Astrophysical Journal, vol. 715, no. 2, 2010, pp. 1352-1365.http://dx.doi.org/10.1088/0004-637X/715/2/1352
---------- VANCOUVER ----------
Vásquez, A.M., Frazin, R.A., Manchester IV, W.B. The solar minimum corona from differential emission measure tomography. Astrophys. J. 2010;715(2):1352-1365.http://dx.doi.org/10.1088/0004-637X/715/2/1352
