Statistics – Computation
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.250..633r&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 250, June 1, 1991, p. 633-637.
Statistics
Computation
6
Electron Scattering, Line Shape, Line Spectra, Stellar Atmospheres, Stellar Spectra, Absorptivity, Computational Astrophysics, Distribution Functions
Scientific paper
Spectral line profiles from a plane-parallel homogeneous atmosphere have been calculated for the complete and partial redistribution mechanisms (CRD and PRD) including coherent and noncoherent electron scattering. It is found that in all the cases where the electron scattering coefficient is more than the continuous absorption coefficient, there are measurable changes in the spectral line profiles. In such situations, the PRD profiles have more emission hump compared to CRD profiles in the intermediate frequency range. Extended wings and additional broadening of the line profiles are obtained for the case of noncoherent electron scattering compared to coherent electron scattering. These results have implications in the derivation of physical properties (for example, microturbulent velocities) of stellar atmospheres from spectral lines.
Mohan Rao D.
Peraiah Annamaneni
Rangarajan K. E.
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