Some TH´EMIS-MTR observations of the second solar spectrum

Bommier, V. and Molodij, G. (2002) Some TH´EMIS-MTR observations of the second solar spectrum. Il nuovo cimento C, 25 (5\6). pp. 803-809. ISSN 1826-9885

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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.

Item Type: Article
Additional Information: Paper presented at the International Meeting on THEMIS and the New Frontiers of Solar Atmosphere Dynamics, Rome, Italy, March 19-21, 2001. Based onobserv ations made with TH´EMIS operated on the island of Tenerife by CNRSCNR in the Spanish Observatorio del Teide of the Instituto de Astrofisica de Canarias.
Uncontrolled Keywords: Solar electromagnetic radiation
Subjects: 500 Scienze naturali e Matematica > 550 Scienze della Terra > 551 Geologia, Idrologia, Meteorologia > 551.5 Meteorologia (Classificare qui l'atmosfera) (Classificare la previsione e le previsioni di specifici fenomeni meteorologici in 551.64; classificare la Micrometeorologia in 551.66) > 551.52 Termodinamica, interazioni atmosferiche con la superficie terrestre, temperature, radiazioni > 551.527 Radiazioni (per fenomeni ottici, vedi 551.565) > 551.5271 Radiazione solare
Depositing User: Marina Spanti
Date Deposited: 12 Mar 2020 17:24
Last Modified: 12 Mar 2020 17:24

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