A statistical investigation of microwave burst spectra for the determination of source inhomogeneities

Details A statistical investigation of microwave burst spectra for the determination of source inhomogeneities A statistical investigation of microwave burst spectra for the determination of source inhomogeneities

Dec 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979soph...64..349s&link_type=abstract

Solar Physics, vol. 64, Dec. 1979, p. 349-357. Research supported by the Swiss National Science Foundation.

Physics

16

Microwave Spectra, Nonuniform Magnetic Fields, Radiation Sources, Solar Radio Bursts, Statistical Analysis, Magnetic Flux, Optical Thickness, Statistical Correlation, Temperature Distribution

Scientific paper

A statistical analysis of 106 microwave burst spectra shows that the most frequent value of the spectral index below the peak frequency is 1.4. It is considerably smaller than values found so far and is explained in terms of a thermal and optically thick source whose area increases with decreasing frequency due to temperature and magnetic field inhomogeneities in the source boundary. The interpretation is supported by the absence of correlation between the spectral index and the maximum flux. An estimate of the inhomogeneities is made.

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