Transfer of line radiation in differentially expanding atmospheres. V - Line formation in a decelerating spherical flow

1977 ◽  
Vol 215 ◽  
pp. 247 ◽  
Author(s):  
F. Marti ◽  
P. D. Noerdlinger
Keyword(s):  
Line Formation ◽  
Line Radiation ◽  
Expanding Atmospheres

scholarly journals A General Formulation of the Transfer Equation. II. Line Formation with General Redistribution

1972 ◽  
Vol 25 (2) ◽  
pp. 177 ◽  
Author(s):  
CJ Cannon
Keyword(s):  
Velocity Field ◽  
Spectral Line ◽  
Transfer Equation ◽  
Functional Form ◽  
System Of Equations ◽  
Line Formation ◽  
Line Radiation ◽  
Multidimensional Equation

The multidimensional equation of transfer for spectral line radiation under a general redistribution law is studied. It is shown that the equation may be rewritten as a system of equations of the "Feautrier" form, which are known to be exceedingly stable and efficient under numerical reduction. It is also shown that the inclusion of a multidimensional differential macroscopic velocity field does not alter the functional form of the equations obtained and therefore may also be treated by the general Feautrier technique.

scholarly journals Line Formation in Expanding Atmospheres: (Review Paper)

1976 ◽  
Vol 70 ◽  
pp. 281-312
Author(s):  
D. G. Hummer
Keyword(s):  
Differential Rotation ◽  
Review Paper ◽  
Computational Techniques ◽  
Formation Processes ◽  
Line Formation ◽  
Line Profiles ◽  
Current State ◽  
Expanding Atmospheres

The current state of understanding of line formation processes in expanding atmospheres is reviewed, and the successes and limitations of current computational techniques are summarized. Some results for differential rotation are also given, although very little work has been done in this area. Special attention is given to the severe difficulties that are encountered in inferring the structure of rapidly expanding or rotating atmospheres from observed line profiles because of the failure under these conditions of the Eddington-Barbier relation in integrated light; the value in this respect of continuum and interferometric observations is emphasized.

Transfer of line radiation in differentially expanding atmospheres. IV

1974 ◽  
Vol 193 ◽  
pp. 651 ◽  
Author(s):  
P. D. Noerdlinger ◽  
G. B. Rybicki
Keyword(s):  
Line Radiation ◽  
Expanding Atmospheres
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