Partially Coherent Scattering in Stellar Chromospheres. IV. Analytic Wing Approximations

Details Partially Coherent Scattering in Stellar Chromospheres. IV. Analytic Wing Approximations Partially Coherent Scattering in Stellar Chromospheres. IV. Analytic Wing Approximations

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...415..811g&link_type=abstract

Astrophysical Journal v.415, p.811

Astronomy and Astrophysics

Astronomy

4

Line: Formation, Scattering, Stars: Chromospheres

Scientific paper

Simple analytic expressions are derived to understand resonance-line wings in stellar chromospheres and similar astrophysical plasmas The results are approximate, but compare well with accurate numerical simulations. The redistribution is modeled using an extension of the partially coherent scattering approximation (PCS) which we term the comoving-frame partially coherent scattering approximation (CPCS). The distinction is made here because Doppler diffusion is included in the coherent/noncoherent decomposition, in a form slightly improved from the earlier papers in this series.

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