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dc.contributor.authorEfstathiou, A.
dc.contributor.authorMcCall, A.
dc.contributor.authorHough, J.
dc.identifier.citationEfstathiou , A , McCall , A & Hough , J 1997 , ' Polarization due to dichroic absorption and emission by aligned grains in dusty discs ' , Monthly Notices of the Royal Astronomical Society , vol. 285 , no. 1 , pp. 102-110 .
dc.identifier.otherPURE: 166828
dc.identifier.otherPURE UUID: d834852a-5747-429f-90aa-364f7c5f682f
dc.identifier.otherdspace: 2299/3258
dc.identifier.otherScopus: 0008575210
dc.descriptionOriginal article can be found via: Copyright Royal Astronomical Society [Full text of this article is not available in the UHRA]
dc.description.abstractWe present a method for calculating the infrared polarization due to absorption and emission by aligned grains distributed in a disc or a torus. The temperature distribution in the torus is calculated with the axially symmetric radiative transfer code of Efstathiou & Rowan-Robinson. The polarization patterns predicted for a torus that is believed to be typical of those found in active galactic nuclei (AGN) show a characteristic flip in position angle, as the polarization changes from dichroic absorption to dichroic emission. The wavelength at which the flip occurs is very sensitive to the optical thickness of the torus but not to the fraction of aligned grains, their elongation or any other parameter we have explored. We also find that the predicted polarization is not sensitive to whether grain alignment extends into the hot (inner) part of the disc (T>250K) or not.en
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.titlePolarization due to dichroic absorption and emission by aligned grains in dusty discsen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionScience & Technology Research Institute
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
rioxxterms.typeJournal Article/Review

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