Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh11a1597d&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SH11A-1597
Astronomy and Astrophysics
Astrophysics
[7509] Solar Physics, Astrophysics, And Astronomy / Corona
Scientific paper
The emission from many of the passbands observed with the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO) is dominated by single or several lines from ions that are formed in a narrow range of temperatures (under equilibrium conditions). However, most AIA passbands contain contributions from lines of ions that have formation temperatures that are significantly different from the dominant ion. We investigate the importance of these lines by forward modeling of the AIA passband emission from advanced radiative 3D MHD simulations calculated with the state of the art Bifrost code. We use simulations that span the upper layer of the convection zone to the low corona and solve the full magnetohydrodynamic equations with non-grey and non-LTE radiative transfer and thermal conduction along the magnetic field lines. We find that several of the AIA passbands often include significant contributions from plasma at different temperatures than the canonical temperature values. We describe under which solar conditions in the simulations these discrepancies can typically be expected to occur.
de Pontieu Bart
Hansteen Viggo H.
Martinez-Sykora Juan
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