Physics
Scientific paper
Mar 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978soph...57..205c&link_type=abstract
Solar Physics, vol. 57, Mar. 1978, p. 205-227.
Physics
2
Radiant Flux Density, Solar Radio Bursts, Very High Frequencies, Decametric Waves, Dipole Antennas, Halos, Interferometers, Least Squares Method, Radio Scattering, Solar Granulation, Stellar Models
Scientific paper
Results are reported for multiple-baseline interferometric measurements of type II, III, IV, and V solar radio bursts at 26.4 MHz. Thirty-two burst events in a two-month period are analyzed by fitting a double-Gaussian two-dimensional source-brightness distribution model to the observed interferometer visibility function. The multibaseline time-sharing interferometer system employed is described in detail, the model-fitting technique is outlined, and values of the model-fit parameters are given for all 32 cases, which include two type II bursts, three type IV bursts, 17 type III bursts, seven type V bursts, and three bursts of type III, V pairs. The temporal evolution of source structure, size, and motion is examined for the different burst types. The core-halo source structure for the type III bursts is interpreted in comparison to two models, one of which assumes scattering and refraction of a point source while the other postulates primarily refraction from an ensemble of sources distributed over a wide sector in solar longitude.
Chen S.-L. H.
Shawhan Stanley D.
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