Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh11a1614d&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SH11A-1614
Astronomy and Astrophysics
Astrophysics
[7509] Solar Physics, Astrophysics, And Astronomy / Corona, [7513] Solar Physics, Astrophysics, And Astronomy / Coronal Mass Ejections, [7524] Solar Physics, Astrophysics, And Astronomy / Magnetic Fields, [7549] Solar Physics, Astrophysics, And Astronomy / Ultraviolet Emissions
Scientific paper
In this work we present an analysis of two EUV waves observed by the Atmospheric Imaging Assembly (AIA) aboard the Solar Dynamics Observatory (SDO) in the context of thermodynamic MHD simulations of the global Solar Corona. Due to the extreme advances in cadence, resolution, and bandpass coverage in the EUV regime, the AIA instrument offers an unprecedented ability to observe the dynamics of large scale coronal wave-like transients known as EUV waves. However, the complexity of the corona, coupled with line-of-sight (LOS) projection of structures, can often make the physical nature of EUV waves difficult to interpret directly. To provide a comprehensive physical analysis and further compliment observational insight, we employ a global MHD model that captures the thermodynamic structure of the low corona for the conditions of a given solar rotation (the LC component of the SWMF). This provides a self-consistent framework to characterize both the pre-event conditions as well as the time-dependent dynamics of the eruption itself using a CME eruption model. A key feature of this model is the ability to synthesize the multi-filter response of the SDO/AIA instrument directly from model data, which allows for direct interpretation of AIA observations with full knowledge of the 3D magnetic and thermodynamic structures in the simulations. We focus on the interpretation of the stark thermodynamic signatures in the multi-filter AIA data within the propagating EUV wave front (unambiguous now due to the high uniform cadence of the AIA band-passes) and address the non-linear interaction of the EUV wave front with neighboring regions in the ambient corona.
der Holst Bart van
Downs Cooper
Lugaz Noé
Roussev Ilia I.
Vourlidas Angelos
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