The radio spectrum of the A.R. (active region) 2490, in the range of wavelengths between 8 mm and 20 cm, is presented. The A.R. presents a double structure at λ ≥ 2.8 cm. It is shown that gyroresonance absorption at λ = 6 cm, which is the main source of opacity in the portion of the A.R. overhanging the sunspots, plays an important role also in the radio source associated with the Hα plage.
DRAGO, FC,Ji SC. Radio spectrum of a solar active region[J]. SCIENTIA SINICA SERIES A-MATHEMATICAL PHYSICAL ASTRONOMICAL & TECHNICAL SCIENCES,1987,30(11):1199-1202.
APA
DRAGO, FC,&纪树臣.(1987).Radio spectrum of a solar active region.SCIENTIA SINICA SERIES A-MATHEMATICAL PHYSICAL ASTRONOMICAL & TECHNICAL SCIENCES,30(11),1199-1202.
MLA
DRAGO, FC,et al."Radio spectrum of a solar active region".SCIENTIA SINICA SERIES A-MATHEMATICAL PHYSICAL ASTRONOMICAL & TECHNICAL SCIENCES 30.11(1987):1199-1202.
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