Abstract

[1] In the interest of quantitatively assessing the capabilities of coronal MHD models, we have developed a metric that compares the structures of the white light corona observed with SOHO LASCO C2 to model predictions. The MAS model is compared to C2 observations from two Carrington rotations during solar cycle 23, CR1913 and CR1984, which were near the minimum and maximum of solar activity, respectively, for three radial heights, 2.5 R⊙, 3.0 R⊙, and 4.5 R⊙. In addition to simulated polarization brightness images, we create a synthetic image based on the field topology along the line of sight in the model. This open-closed brightness is also compared to LASCO C2 after renormalization. In general, the model's magnetic structure is a closer match to observed coronal structures than the model's density structure. This is expected from the simplified energy equations used in current global corona MHD models.

Publication Date

6-5-2009

Journal Title

Journal of Geophysical Research: Space Physics

Publisher

American Geophysical Union

Digital Object Identifier (DOI)

10.1029/2008JA013732

Document Type

Article

Rights

Copyright 2009 by the American Geophysical Union.

Included in

Physics Commons

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