LINEAR POLARIZATION OF FLASH SPECTRUM OBSERVED FROM A TOTAL SOLAR ECLIPSE IN 2008
- Yunnan Astronomical Observatory, National Astronomical Observatories, Chinese Academy of Sciences, Kunming, Yunnan 650011 (China)
- Yunnan Normal University, Kunming, Yunnan 650135 (China)
We measured linear polarization signals of the flash spectrum ranging from 502.5 nm to 528.5 nm after second contact of a total solar eclipse which occurred on 2008 August 1 in China. A large group of spectral lines (especially those lines produced by neutral iron, neutral copper, and as carbon molecules) are found with very high polarization degrees relative to the continuum polarization, and the linear polarization spectrum is more abundantly structured than the flash spectrum itself. According to the observational result, we conclude that coherent scattering and scattering geometry as well as other mechanisms may together play a very important role in producing the high polarization amplitudes. This will help us deepen our understanding of the physical conditions of the solar upper atmospheres and the physical processes occurring there.
- OSTI ID:
- 21296258
- Journal Information:
- Astrophysical Journal (Online), Vol. 695, Issue 2; Other Information: DOI: 10.1088/0004-637X/695/2/L194; Country of input: International Atomic Energy Agency (IAEA); ISSN 1538-4357
- Country of Publication:
- United States
- Language:
- English
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