Comparison of the microwave and soft X-ray emission above a sunspot

Details Comparison of the microwave and soft X-ray emission above a sunspot Comparison of the microwave and soft X-ray emission above a sunspot

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989soph..119...65s&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 119, no. 1, 1989, p. 65-75.

Physics

3

Microwave Emission, Solar X-Rays, Sunspots, Brightness Temperature, Cyclotron Radiation, Electron Energy, Resonance, Spatial Resolution, Umbras

Scientific paper

Observations of the active sunspot region HL 16864 obtained with the 6-cm Westerbork Synthesis Radio Telescope have been compared with X-ray results obtained on May 25, 1980 using the SMM flat crystal spectrometer (FCS). The data confirm the presence of a temperature depression above the spot umbra. It is suggested that the significant differences noted in the spatial distribution of the X-ray and radio emissions may be due to the strong resonant character of the cyclotron radio radiation, along with the relatively low efficiency and spatial resolution of the FCS. Deconvolution of the X-ray images has made possible the detection of new structures and has enhanced the ability to correlate data from the two kinds of emission.

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