Analytical solutions for saturated P cygni type profiles II: General case
Source: Astrophysics and Space Science, Volume 286, Numbers 3-4, 2003 , pp. 333-345(13)
Abstract: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.
Document Type: Research Article
Affiliations: 1: Tartu Observatory, Tõravere 61602, Estonia;, Email: email@example.com 2: Tartu Observatory, Tõravere 61602, Estonia;, Email: firstname.lastname@example.org 3: Tartu Observatory, Tõravere 61602, Estonia;, Email: email@example.com
Publication date: 2003