Global Temperature Structures Determined from DEMT

Details Global Temperature Structures Determined from DEMT Global Temperature Structures Determined from DEMT

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh21b1913h&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SH21B-1913

Astronomy and Astrophysics

Astrophysics

[7509] Solar Physics, Astrophysics, And Astronomy / Corona, [7536] Solar Physics, Astrophysics, And Astronomy / Solar Activity Cycle

Scientific paper

We study the global temperature structures during a solar minimum by using 3D Differential Emission Measure Tomography (DEMT) and a potential field source surface (PFSS) model. For CR2077, we first use the PFSS model to generate the magnetic field structures. Then we trace the temperature from DEMT along field lines to get the temperature profile. From DEMT derived densities, we also determine density scale height temperatures. We find different behaviors between the closed and open magnetic field lines: the DEMT temperatures of the open filed lines tend to be less than the hydrostatic temperatures. In the closed field lines, however, these two temperatures are very close, indicating the hydrostatic solution is valid. Furthermore, we find two different temperature structures: UP structures where the temperature is increasing with height and DOWN structures where the temperature is decreasing with height. In the open field line regions, the UP structures are dominant while in the closed field line regions, the number of UP structures and DOWN structures is similar.

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