Analytical solutions for saturated P cygni type profiles II: General case

As in the first part of the present study (Sapar et al., 2002) we use the β-law for velocity of stellar wind and the Sobolev approximation for radiative transfer. Here we have succeeded to derive general and relatively simple analytical formulae in elementary functions for saturated P Cygni type lin...

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Bibliographic Details
Published in:Astrophysics and space science 2003-01, Vol.286 (3-4), p.333-345
Main Authors: Sapar, A, Sapar, L, Poolamaee, R
Format: Article
Language:English
Subjects:
Astrophysics
Clouds
Radiative transfer
Online Access:Get full text
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Summary:As in the first part of the present study (Sapar et al., 2002) we use the β-law for velocity of stellar wind and the Sobolev approximation for radiative transfer. Here we have succeeded to derive general and relatively simple analytical formulae in elementary functions for saturated P Cygni type line profiles if parameter 2β is arbitrary positive integer (in the first part we studied the cases 2β ≤ 4). The four terms obtained describe contributions to the line profile due to isotropic and anisotropic parts of optical thickness in the source function of the light-scattering layer followed by isotropic and anisotropic parts of multiple scattering. The limits of acceptability of the Sobolev approximation for β-law have been discussed and specified.[PUBLICATION ABSTRACT]
ISSN:0004-640X
1572-946X
DOI:10.1023/A:1026374800760