Computer Science – Numerical Analysis
Scientific paper
Mar 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982soph...76..221e&link_type=abstract
Solar Physics, vol. 76, Mar. 1982, p. 221-237.
Computer Science
Numerical Analysis
11
Astronomical Maps, Centimeter Waves, Chromosphere, Photosphere, Solar Magnetic Field, Solar Radio Emission, Stellar Structure, Brightness Temperature, Filtergrams, Least Squares Method, Numerical Analysis, Radio Telescopes, Spatial Resolution
Scientific paper
Results are presented of a detailed study of quiet sun emitting regions at 6 cm and their correspondence with regions observed at optical wavelengths. The Westerbork Synthesis Radio Telescope was used to obtain a 12-hr synthesis map of a quiet sun region with a resolution of 6 arcsec. Comparison of this map with a Ca(+) K filtergram indicates the features on the 6-cm map to correspond to Ca(+) K chromospheric networks and cells. In addition, about 72% of the magnetic field enhancements observed on photospheric magnetograms coincides with 6-cm emissive regions. Intercomparison of the 12-hr synthesis map, a 4-hr synthesis map and 6-cm fan beam scans along with the Ca(+) K and magnetogram results reveals all of the time-varying 6-cm elements to be located on Ca(+) K networks, and about 40% of them to be coincident with magnetogram enhancements. Lifetimes of the time-varying sources vary from a few minutes to several tens of minutes, and intensity varies by factors of 2 to 7.
Erskine F. T.
Kundu Mukul R.
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