The Probability for Two Distinct High-Temperature Components in the 23-July-2002 Solar Flare

Details The Probability for Two Distinct High-Temperature Components in the 23-July-2002 Solar Flare The Probability for Two Distinct High-Temperature Components in the 23-July-2002 Solar Flare

May 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21640408m&link_type=abstract

American Astronomical Society, AAS Meeting #216, #404.08; Bulletin of the American Astronomical Society, Vol. 41, p.900

Astronomy and Astrophysics

Astronomy

1

Scientific paper

For RHESSI observations of large solar flares, the thermal component often is best fit by a two-temperature model. It is not clear, however, that there truly are two distinct components, since the typical spectral fitting process only allows two components. In this calculation we allow as many components as needed in the temperature-dependent emission measure distribution, EM(T). We then ask the question: Does the best-fit EM(T) function resolve into two easily-identifiable components?
We use RHESSI data from the X-class flare of 23-July-2002 and recently developed calibrations and pulse-pileup corrections for the data analysis. We also include a discussion of the fitting process and the expected temperature resolution for the RHESSI spectrometers, since this is crucial information for our calculation.
This work is supported by NASA contract NAS5-98033 and NASA grant NNX08AJ18G.

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