Opacity effects on the polarization of line emissions in astrophysical plasmas

Details Opacity effects on the polarization of line emissions in astrophysical plasmas Opacity effects on the polarization of line emissions in astrophysical plasmas

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009ap%26ss.322..113h&link_type=abstract

Astrophysics and Space Science, Volume 322, Issue 1-4, pp. 113-116

Astronomy and Astrophysics

Astrophysics

Polarization, Spectral Lines, Opacity

Scientific paper

Polarization-based line spectroscopy is a valuable tool in determining the characteristics of electron distribution functions in anisotropic plasmas. For instance, directional electrons can unevenly populate the magnetic sublevels of atomic energy levels resulting in partial polarization of the emitted spectral lines. The large dimensions of astrophysical sources raise the possibility of non-negligible self-absorption effects on spectral line properties. Alternatively, the high densities characteristic of laser-produced laboratory plasmas can also result in substantial optical depth values. We present a modeling study of He-like Fe line emissions in which we investigate the effects of radiation transport on the polarization of selected spectral lines under corona conditions.

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