Some TH´EMIS-MTR observations of the second solar spectrum
The aim of the present paper is twofold: first, observations of the scattering polarization spectrum achieved near the solar limb in quiet regions (North Pole) are reported for a series of lines: Sr I 460.7 n m, Na I D1 589.6 nm and D2 589.0 nm, Ba II D1 493.4 nm and D2 455.4 nm, C I 493.2 nm. The T...
| Main Authors: | , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Societa italiana di fisica
2002
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| Online Access: | http://eprints.bice.rm.cnr.it/15083/ http://eprints.bice.rm.cnr.it/15083/1/ncc8862.pdf https://www.sif.it/riviste/sif/ncc/econtents/2002/025/05-06/article/2 |
| Summary: | The aim of the present paper is twofold: first, observations of the scattering polarization spectrum achieved near the solar limb in quiet regions (North Pole) are reported for a series of lines: Sr I 460.7 n m, Na I D1 589.6 nm and D2 589.0 nm, Ba II D1 493.4 nm and D2 455.4 nm, C I 493.2 nm. The TH´EMIS observational and data reduction techniques are briefly described. Second, the depolarizing effect of the hyperfine structure on the scattering polarization of the Na I D2 line is investigated, in view of future observations interpretation. Results of computation show that the depolarization due to the hyperfine splitting is important in Na I D2. The lower-level polarizationeffect is investigated also. |
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