Spectro-Imaging Polarimetry of the Local Corona During Solar Eclipse

Qu, Z.Q.; Dun, G.T.; Chang, L.; Murray, G.; Cheng, X.M.; Zhang, X.Y.; Deng, L.H.

Abstract

Results are presented from spectro-imaging polarimetry of radiation from the local solar corona during the 2013 total solar eclipse in Gabon. This polarimetric observation was performed from 516.3 nm to 532.6 nm using a prototype Fiber Arrayed Solar Optical Telescope (FASOT). A polarimetric noise level on the order of 10−310−3 results from a reduced polarimetric optical switching demodulation (RPOSD) procedure for data reduction. It is revealed that the modality of fractional linear polarization profiles of the green coronal line shows a diversity, which may indicate complex mechanisms. The polarization degree can approach 3.2 % above the continuum polarization level on a scale of 1500 km, and the nonuniform spatial distribution in amplitude and polarization direction is found even within a small field of view of 7500 km. All of this implies that the coronal polarization is highly structured and complex even on a small scale.

Citation

Qu, Z., Dun, G., Chang, L., Murray, G., Cheng, X., Zhang, X., & Deng, L. (2017). Spectro-Imaging Polarimetry of the Local Corona During Solar Eclipse. Solar Physics, 292(2), Article 37. https://doi.org/10.1007/s11207-017-1055-x

• Journal Article Type: Article
• Acceptance Date: Jan 16, 2017
• Online Publication Date: Feb 14, 2017
• Publication Date: Feb 14, 2017
• Deposit Date: Dec 13, 2017
• Publicly Available Date: Dec 13, 2017
• Journal: Solar Physics
• Print ISSN: 0038-0938
• Electronic ISSN: 1573-093X
• Publisher: Springer
• Peer Reviewed: Peer Reviewed
• Volume: 292
• Issue: 2
• Article Number: 37
• DOI: https://doi.org/10.1007/s11207-017-1055-x
• Public URL: https://durham-repository.worktribe.com/output/1342407