Resonance-line transfer with partial redistribution. VIII. Solution in the comoving frame for moving atmospheres

Journal Article · Thu Apr 15 04:00:00 EST 1976 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/154303· OSTI ID:7347448

Mihalas, D; Shine, R A; Kunasz, P B; Hummer, D G

An analysis of the effects of partial frequency redistribution in the scattering process for lines formed in moving atmospheres has been performed using a flexible and general method which allows solutions of the transfer equation in the comoving frame of the gas. As a specific example, we consider the same chromospheric and atomic model, with the same velocity field, that was studied by Cannon and Vardavas. We find that the large changes in the profiles obtained by those authors, between the cases of complete and partial redistribution are spurious effects of angle averaging in the observer's frame instead of the comoving frame. Our results support fully the conclusion by Magnan that these changes are, in fact, unreal, at least for this particular model and redistribution function. Future work with other redistribution functions and with nonmonotone velocity fields will be possible using the techniques developed in this paper. (AIP)

• Research Organization: High Altitude Observatory, National Center for Atmospheric Research
• OSTI ID: 7347448
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 205:2; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION
ATMOSPHERES
CHROMOSPHERE
DISTRIBUTION FUNCTIONS
EMISSION
ENERGY TRANSFER
FREQUENCY DEPENDENCE
HEAT TRANSFER
ISOTROPY
RADIANT HEAT TRANSFER
RESONANCE
SOLAR ATMOSPHERE
STELLAR ATMOSPHERES