IAFE   05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
artículos
Título:
Validation of Two MHD Models of the Solar Corona with Rotational Tomography
Autor/es:
ALBERTO M. VASQUEZ; RICHARD A. FRAZIN; KEIJI HAYASHI; IGOR V. SOKOLOV; OFER COHEN; WARD B. MANCHESTER IV; FARZAD KAMALABADI
Revista:
ASTROPHYSICAL JOURNAL
Editorial:
The University of Chicago Press
Referencias:
Lugar: Austin, Texas-EEUU; Año: 2008 vol. 682 p. 1328 - 1337
ISSN:
0004-637X
Resumen:
We demonstrate a validation of two 3D MHD models of the corona by
comparing density values from solar rotational tomography (SRT) to
densities and morphological properties of the two MHD solutions for CR
2029 (2005 April 21-May 18). The two MHD models are given by the
Stanford and Michigan models, and both use the same synoptic magnetogram
from MDI as a lower boundary condition. The SRT reconstructions are
based on polarized white-light images MLSO Mk IV data for the region
between 1.1 and 1.5 Rsolar (solar radii) and LASCO C2 for the
region between 2.3 and 6.0 Rsolar. While the Stanford MHD
model reasonably reproduces the tomographic density over the south pole,
it fares less well over the north pole, and the Michigan MHD model
underestimates the density over both poles. At lower latitudes, we find
that while the MHD models have better agreement with the tomographic
densities in the region below 3.5 Rsolar, at larger heights
the agreement is more problematic. Our interpretation is that the base
densities and temperatures of the models need to be improved, as well as
their radial density gradients.