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On the polarization of resonantly scattered emission lines – I. Emission and absorption coefficients in an anisotropic radiation field

Lee, H.-W. and Blandford, R. D. and Western, L. (1994) On the polarization of resonantly scattered emission lines – I. Emission and absorption coefficients in an anisotropic radiation field. Monthly Notices of the Royal Astronomical Society, 267 (2). pp. 303-311. ISSN 0035-8711. https://resolver.caltech.edu/CaltechAUTHORS:20190523-125439058

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Abstract

Source functions and absorptions coefficients for polarized radiation in a given ansiotropic radiation field are calculated for a variety of permitted electric dipole transitions in the L–S coupling limit. Collisional, radiative and magnetic mixing of the ground sublevels are all considered. The polarization of the self-consistent, emergent radiation field is computed, using an anisotropic escape probability formalism to treat the radiative transfer. It is found that the radiative mixing can enhance the polarization for transitions with large angular momentum, and degrees of polarization ≲ 10 per cent are obtained for transitions with small angular momentum.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1093/mnras/267.2.303DOIArticle
http://adsabs.harvard.edu/abs/1994MNRAS.267..303LADSArticle
ORCID:
AuthorORCID
Blandford, R. D.0000-0002-1854-5506
Additional Information:© 1994 Royal Astronomical Society. Provided by the NASA Astrophysics Data System. Accepted 1993 October 14. Received 1993 August 24; in original form 1993 June 23. We thank M. Cohen, R. Emmering, R. Goodrich and J. Miller for helpful discussions. We are very grateful to G. M. Voit for his friendly comments and advice. Support under NASA grant NAGW2372 and NSF grant AST89-17765 is gratefully acknowledged.
Group:TAPIR
Funders:
Funding AgencyGrant Number
NASANAGW 2372
NSFAST 89-17765
Subject Keywords:atomic processes, line: formation, polarization, radiative transfer, galaxies: active
Issue or Number:2
Record Number:CaltechAUTHORS:20190523-125439058
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190523-125439058
Official Citation:H.-W. Lee, R. D. Blandford, L. Western, On the polarization of resonantly scattered emission lines – I. Emission and absorption coefficients in an anisotropic radiation field, Monthly Notices of the Royal Astronomical Society, Volume 267, Issue 2, 15 March 1994, Pages 303–311, https://doi.org/10.1093/mnras/267.2.303
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95752
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:24 May 2019 16:54
Last Modified:03 Oct 2019 21:16

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