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Isothermal and Multithermal Analysis of Coronal Loops Observed with AIA View all abstracts by submitter

Joan Schmelz   Submitted: 2011-02-14 09:48

The coronal filters in the Atmospheric Imaging Assembly (AIA) aboard the Solar Dynamics Observatory peak at different temperatures; the series covers the entire active region temperature range, making AIA ideal for multi-thermal analysis. Here we analyze coronal loops from several active regions that have been observed by AIA. We have specifically targeted cool loops (or at least loops with a cool component) that were chosen in the 171Å channel of AIA, which has a peak response temperature of Log T = 5.8. We wanted to determine if the loops could be described as isothermal or multithermal. We find that several of our 12 loops have narrow temperature distributions, which may be consistent with isothermal plasma; these can be modeled with a single flux tube. Other loops have intermediate-width temperature distributions, appear well-constrained, and should be multi-stranded. The remaining loops, however, have unrealistically broad DEMs. We find that this problem is the result of missing low-temperature lines in the AIA 131Å channel. If we repeat the analysis without the 131Å data, these loops also appear to be well-constrained and multi-stranded.

Authors: Schmelz, Jenkins, Worley, Anderson, Pathak, Kimble
Projects: SDO-AIA

Publication Status: ApJ accepted for publication
Last Modified: 2011-02-14 11:04
Go to main E-Print page  Steady state reconnection at a single 3D magnetic null point  AIA Multithermal Loop Analysis: First Results  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

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