The Sensitivity of the Second Solar Spectrum of the Li I 6708 Å Doublet to the Lithium Isotopic Abundance and to a Microturbulent Magnetic Field

Bibcode
2009ASPC..405..107B
Belluzzi, L.; Landi Degl'Innocenti, E.; Trujilo-Bueno, J.
Bibliographical reference

Solar Polarization 5: In Honor of Jan Stenflo ASP Conference Series, Vol. 405, proceedings of the conference held 17-21 September, 2007 at Centro Stefano Franscini--Monte Veritá, Ascona, Switzerland. Edited by Svetlana V. Berdyugina, K. N. Nagendra, and Renzo Ramelli. San Francisco: Astronomical Society of the Pacific, 2009., p.107

Advertised on:
6
2009
Number of authors
3
IAC number of authors
0
Citations
0
Refereed citations
0
Description
The second solar spectrum offers a novel diagnostic window not only to explore the magnetic field of our nearest star, but also to determine the atomic and isotopic abundances in the solar atmosphere. A very interesting example, concerning this second aspect, is the Li I resonance doublet at 6708~Å. Here we present a detailed theoretical investigation, carried out within the framework of the density matrix formalism, on the atomic physics that is involved in the generation of the observed Q/I profile, which is the result of a complex blend of the D_1 and D_2 lines of the two stable isotopes of lithium (^6Li and ^7Li), both showing hyperfine structure. We discuss the diagnostic potential of this linear polarization profile for the determination of the lithium isotopic abundance in the quiet Sun, and we investigate the magnetic sensitivity of this profile to a microturbulent magnetic field.
Type
Non-refereed

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