1. IIA Institutional Repository
  2. IIAP Publications
  3. IIAP Publications
Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/4239
Title: Effects of high radial velocities on line transfer in extended atmospheres
Authors: Peraiah, A
Keywords: Gas Expansion
Radial Velocity
Radiative Transfer
Stellar Atmospheres
Stellar Spectra
Atomic Energy Levels
Boundary Conditions
Boundary Value Problems
Incident Radiation
Line Spectra
Matrices (Mathematics)
Thermodynamic Equilibrium
Voigt Effect
Issue Date: 1980
Publisher: Copernicus Foundation for Polish Academy
Citation: Acta Astronomica, Vol. 30, No. 4, pp. 525 - 540.
Abstract: The equation of radiative transfer in a comoving frame has been solved for rapidly expanding gaseous medium in spherically symmetric extended stellar atmospheres. A non-LTE two-level atom with Voigt profile function is assumed. The comoving terms in the radiative transfer are discretized in the framework of the discrete space theory of Grant. These terms are simply reduced to a tri-diagonal matrix. The boundary conditions for the frequency derivative can be introduced through the elements of the first and last rows of this matrix. This seems to be quite stable for arbitrary velocities in the medium. Maximum velocities up to 60 units of mean thermal velocities have been considered.
URI: http://hdl.handle.net/2248/4239
ISSN: 0001-5237
Appears in Collections:IIAP Publications

Files in This Item:
File Description SizeFormat 
Effects of high radial velocities on line transfer in extended atmospheres891.2 kBAdobe PDFThumbnail
View/Open
Show full item record


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.