Imaging Observations of Coronal Magnetic Field by Nobeyama Radioheliograph

Details Imaging Observations of Coronal Magnetic Field by Nobeyama Radioheliograph Imaging Observations of Coronal Magnetic Field by Nobeyama Radioheliograph

Apr 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aspc..437..433s&link_type=abstract

Solar Polarization 6. Proceedings of a conference held in Maui, Hawaii, USA on May 30 to June 4, 2010. Edited by J. R. Kuhn, D.

Astronomy and Astrophysics

Astronomy

Scientific paper

Coronal magnetic field in a post flare arcade of loops above the solar limb is mapped by the Nobeyama Radioheliograph. Post flare loops are filled with hot and dense plasma threaded by magnetic field. Thermal free-free microwave emission from these plasma is bright enough to carefully measure circular polarization degree. As circular polarization is the result of gyration of electrons around magnetic field, inversion of circular polarization degree to magnetic field strength is simple. We successfully measured the circular polarization degree distribution at 17 GHz and got a magnetic field map in a post flare arcade of loops above the solar limb.

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