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Estimate of coronal magnetic fields from contour maps of the intensity and polarization degree of the burst on 1992 October 27
Xing-Feng Yu ; Jin-Xing Yao
2002
Source PublicationAdvances in Space Research
Volume29Issue:3Pages:469-474
AbstractContour maps at 17 GHz of the 1992 October 27 solar burst are analysed. Using a nonthermal inhomogeneous model of the radio source, variations of calculated brightness temperature with distance from the projected center of the source is in better agreement with the observed map at 01:45:29.889 UT. The calculation shows that the characteristic magnetic field gradient alpha B (magnetic field distribution is B m(r/r m) -alpha(B)=2000(r/r m) -2) at the peak of the 17 GHz emission is about 2, magnetic strength B is about 737 G with the magnetic field B m of the core being 2000 G. On the other hand, from the polarization contour map and the "limiting polarization" concept, we obtain a magnetic moment d=1.4-2.5times10 32 cgs units, and a coronal magnetic field B=20-30 G at the height of 1.7-1.9times10 10 cm
Subject AreaAstronomy & Astrophysics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/7929
Collection太阳高能及相关物理过程研究团组
Recommended Citation
GB/T 7714
Xing-Feng Yu,Jin-Xing Yao. Estimate of coronal magnetic fields from contour maps of the intensity and polarization degree of the burst on 1992 October 27[J]. Advances in Space Research,2002,29(3):469-474.
APA Xing-Feng Yu,&Jin-Xing Yao.(2002).Estimate of coronal magnetic fields from contour maps of the intensity and polarization degree of the burst on 1992 October 27.Advances in Space Research,29(3),469-474.
MLA Xing-Feng Yu,et al."Estimate of coronal magnetic fields from contour maps of the intensity and polarization degree of the burst on 1992 October 27".Advances in Space Research 29.3(2002):469-474.
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