Comoving frame calculations of spectral lines formed in rapidly expanding media with the partial frequency redistribution function for zero natural line width

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Abstract

Comoving frame calculations have been used to compute the spectral lines formed in rapidly expanding spherical media. We have employed the angle-averaged partial frequency redistribution functionR _I with a two-level atom model in non-LTE atom approximation. A linear velocity law increasing with radius has been employed with maximum velocity at Τ=0 being set equal to 30 mean thermal units. It is found that one obtains almost symmetric emission line profiles at large velocities similar to those found in quasars.

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Authors and Affiliations

Indian Institute of Astrophysics, 560034, Bangalore
A. Peraiah

Cite this article

Peraiah, A. Comoving frame calculations of spectral lines formed in rapidly expanding media with the partial frequency redistribution function for zero natural line width. J Astrophys Astron 1, 3–16 (1980). https://doi.org/10.1007/BF02727945

Received08 February 1980

Accepted07 April 1980
Issue DateSeptember 1980
DOIhttps://doi.org/10.1007/BF02727945

Keywords

radiative transfer
partial redistribution function
commoving Frame
pectral lines

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