Conservative Anisotropic Scattering in a Finite Plane-Parallel Atmosphere: T. W. Mullikin's "constraints"

1967 ◽  
Vol 149 ◽  
pp. 195 ◽  
Author(s):  
I. W. Busbridge
Keyword(s):  
Anisotropic Scattering ◽  
Finite Plane ◽  
Plane Parallel

scholarly journals Si II Lines in the Shell of ζ Tau

1976 ◽  
Vol 70 ◽  
pp. 315-320
Author(s):  
Sara R. Heap
Keyword(s):  
Thick Disk ◽  
Be Stars ◽  
Finite Plane ◽  
Plane Parallel ◽  
Realistic Geometry

Non-LTE strengths of Si II lines were computed in an effort to reproduce the observed strengths of Si II lines in the shell spectrum of ζ Tau. This effort was unsuccessful, probably because it assumed that the shell could be represented by a finite, plane-parallel slab. The main conclusion of this study, then, is that in order to understand the shell spectra of Be stars, a more realistic geometry must be assumed, in which the shell is represented by a thick disk.

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