Statistics – Computation
Scientific paper
Jun 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...179..329f&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 179, no. 1-2, June 1987, p. 329-338.
Statistics
Computation
11
Electric Fields, Lyman Alpha Radiation, Plasma-Electromagnetic Interaction, Polarized Radiation, Resonance Scattering, Solar Atmosphere, Chromosphere, Computational Astrophysics, Solar Corona, Solar Flares
Scientific paper
The influence of an electrostatic field on the polarization of the scattered radiation in Lyα is investigated. The incident radiation is supposed to be in the form of a unidirectional, unpolarized pencil of radiation, while the scattering atom is schematized as a two-level atom, devoid of hyperfine structure, with no atomic polarization in its ground level. The atom is described in the formalism of the density matrix operator and the statistical equilibrium equations for the density matrix are derived. The results are given in terms of linear and circular polarization as a function of the electric field intensity and direction, and they are interpreted through convenient analogies with the Hanle effect and through a semiclassical model based on the electromagnetic equations of a damped oscillator in an electric field.
Favati B.
Landi Degl'Innocenti Egidio
Landolfi Marco
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