Physics
Scientific paper
Sep 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008espm...12.2.59h&link_type=abstract
"12th European Solar Physics Meeting, Freiburg, Germany, held September, 8-12, 2008. Online at http://espm.kis.uni-freiburg.de/,
Physics
Scientific paper
The Solar Aspect System (SAS) on the RHESSI satellite consists of three simple lenses with linear CCD detectors, whose data we use to synthesize images of solar photospheric brightness. The three independent detectors record about 1,000 line images per day each, with chord locations at roughly random positions on the disk. The synthesized images allow us to study the mean distribution of faculae and enhanced network. RHESSI has been observing since launch in 2002. Here we report an analysis of three years (2003-2005) of the these data. We find strong correlations between the facular excess signals in these data, and EUV brightness as derived from SOHO/EIT. The data interior to mu of about 0.24 fit a generalization of the "hot wall" model, but this fails closer to the limb. We discuss the fit and its model discrepancy in terms of the geometry of the observation, including the possibility of a "cloud" model, ie one involving emitting material above the height of the photosphere.
Fivian Martin D.
Hudson Hugh S.
Zahid Jabran H.
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