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The generation and ...
The generation and transformation of polarization signals in molecular lines through collective anisotropic resonant scattering
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- Houde, M. (författare)
- Western University
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- Lankhaar, Boy, 1991 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Rajabi, F. (författare)
- Western University,Perimeter Institute for Theoretical Physics
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- Chamma, M. A. (författare)
- Western University
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(creator_code:org_t)
- 2022-01-04
- 2022
- Engelska.
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Ingår i: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 511:1, s. 295-315
- Relaterad länk:
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We discuss the existence of elliptical polarization in rotational spectral lines of CO and other molecules within the context of the Anisotropic Resonant Scattering (ARS) model. We show that the effect of ARS on the radiation field can lead to not only the previously predicted transformation of background linear polarization into circular polarization (i.e. Faraday conversion) but also the occurrence of Faraday rotation and the generation of elliptically polarized signals in an otherwise initially unpolarized radiation field. This is due to a collective behaviour between the large number of molecules acting as a diffraction ensemble that strongly favours forward scattering over any other mode. Our application to astronomical data demonstrates the dependency of the Stokes parameters on the strength and orientation of the ambient magnetic field, and suggests that ARS will manifest itself for a wide range of molecular species and transitions.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- ISM: molecules
- ISM: clouds
- ISM: magnetic fields
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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