Analytical solutions for saturated P Cygni type profiles |
| |
Authors: | Arved Sapar Lili Sapar Raivo PoolamÄE |
| |
Institution: | 1. Tartu Observatory, T?ravere, 61602, Estonia
|
| |
Abstract: | Analytical formulae for single P Cygni type saturated resonance line profiles in stellar winds have been derived. The limbdarkening
and presence of underlying intrinsic atmospheric profile have been ignored. The Sobolev approximation for radiative transfer
has been used and the general velocity law has been specified by widely used β parameter. The analytical formulae for the
saturated resonance line profiles can be found for cases when 2β is an integer. The formulae for 2β = 1,2, 3 and 4 have been
found by us. Also the formulae for calculating the line profiles in the cases of external and internal sharp truncation (cutoff)
of the scattering shell have been given. Some characteristic line profiles have been presented. It has been shown that the
turbulence-generated isotropic dominant backscattering of radiation in stellar winds generates wide dark plateaux in the blue
wings of spectral lines, and the slopes of plateaux are shaped by turbulence.
This revised version was published online in July 2006 with corrections to the Cover Date. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|