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Paper: The Last Twenty Years. Optically Polarized Atoms in the Solar Atmosphere
Volume: 526, Solar Polarization Workshop 8
Page: 69
Authors: Trujillo Bueno, J.
Abstract: The 8th Solar Polarization Workshop in honor of Prof. Egidio Landi Degl'Innocenti was a unique opportunity to review the last twenty years of research on the generation and transfer of spectral line polarization produced by optically pumped atoms in the solar atmosphere. Many investigations have been carried out since 1997, when Egidio and I published our first joint paper in The Astrophysical Journal Letters, arguing that lower-level depopulation pumping is a key physical mechanism for understanding some of the enigmatic spectral features of the Second Solar Spectrum. Here I provide an overview of the research carried out since then on optically polarized atoms in the solar photosphere, chromosphere and transition region, with emphasis on applications based on the quantum theory of spectral line polarization to which Egidio contributed so many pioneering and fundamental results.
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