Other
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spd....37.0103m&link_type=abstract
American Astronomical Society, SPD meeting #37, #1.03; Bulletin of the American Astronomical Society, Vol. 38, p.215
Other
1
Scientific paper
Since RHESSI was launched in February 2002, it has observed thousands of solar flares. It has also observed solar emission above 3 keV when there are no flares present. The plasma temperature required for this high energy emission is greater than 5 MK, a temperature range that is not often considered for solar active regions. In this work we use RHESSI data for non-flaring times, along with GOES data, to determine the emission measure for the Sun in this high temperature range. The first step will be to simply compare the temperatures and emission measures obtained from the two instruments using the isothermal approximation. The next step will be to use the combined data from the different instruments to obtain a differential emission measure (DEM) for the 5 to 20 MK temperature range. This calculation will give us an upper limit to the plasma temperature for the non-flaring Sun. The entire RHESSI mission, from launch until May 2006, will be analyzed, and we will compare our results with different measures of solar activity (e.g., sunspot number, magnetic flux or radio emission) for this period. This research is supported by NASA contract NAS5-98033.
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