On Stereoimages of Some Structures in the Solar Atmosphere

Details On Stereoimages of Some Structures in the Solar Atmosphere On Stereoimages of Some Structures in the Solar Atmosphere

Feb 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000arep...44..112v&link_type=abstract

Astronomy Reports, Volume 44, Issue 2, February 2000, pp.112-121

Astronomy and Astrophysics

Astronomy

7

Scientific paper

Three-dimensional structures in the solar chromosphere and corona are considered. It is demonstrated that two photoheliograms separated by ˜1 day can be used (using computer-graphics methods) to construct a stereo image of the Sun. The algorithm for this is presented and carried out for Hα images of the total disk. A bulge in the equatorial region resulting from the differential rotation of the Sun can be seen in the stereo image. Structures called Whitney pleats in catastrophe theory are observed in the solar corona. Such structures are encountered in prominences. The well-known helmets (or streamers) are pleats of heliospheric plasma sheets. Isophotes for such a sheet and the degree of polarization of the radiation in the pleat are calculated and compared with observational data.

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