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dc.contributor.authorBatcheldor, D.
dc.contributor.authorRobinson, A.
dc.contributor.authorAxon, D. J.
dc.contributor.authorYoung, S.
dc.contributor.authorQuinn, S.
dc.contributor.authorSmith, J. E.
dc.contributor.authorHough, J.
dc.contributor.authorAlexander, D. M.
dc.date.accessioned2011-09-14T10:01:04Z
dc.date.available2011-09-14T10:01:04Z
dc.date.issued2011-09-01
dc.identifier.citationBatcheldor , D , Robinson , A , Axon , D J , Young , S , Quinn , S , Smith , J E , Hough , J & Alexander , D M 2011 , ' Nicmos polarimetry of "polar-scattered" seyfert 1 galaxies ' , The Astrophysical Journal , vol. 738 , no. 1 , 90 . https://doi.org/10.1088/0004-637X/738/1/90
dc.identifier.issn0004-637X
dc.identifier.otherPURE: 347180
dc.identifier.otherPURE UUID: 74aac21f-aa2e-43d8-ba7d-77e8c1e26276
dc.identifier.otherWOS: 000294015500090
dc.identifier.otherScopus: 80052736839
dc.identifier.urihttp://hdl.handle.net/2299/6416
dc.description‘In these times, during the rise in the popularity of institutional repositories, the Society does not forbid authors from depositing their work in such repositories. However, the AAS regards the deposit of scholarly work in such repositories to be a decision of the individual scholar, as long as the individual's actions respect the diligence of the journals and their reviewers.’ Original article can be found at : http://iopscience.iop.org/ Copyright American Astronomical Society
dc.description.abstractThe nuclei of Seyfert 1 galaxies exhibit a range of optical polarization characteristics that can be understood in terms of two scattering regions producing orthogonal polarizations: an extended polar scattering region (PSR) and a compact equatorial scattering region (ESR), located within the circum-nuclear torus. Here we present NICMOS 2.0 mu m imaging polarimetry of six "polar-scattered" Seyfert 1 (S1) galaxies, in which the PSR dominates the optical polarization. The unresolved nucleus (<0 ''.58) is significantly polarized in only three objects, but five of the six exhibit polarization in a 0 ''.58-1 ''.5 circum-nuclear annulus. In Fairall 51 and ESO 323-G077, the polarization position angle at 2 mu m (theta(2 mu m)) is consistent with the average for the optical spectrum(theta(nu)), implying that the nuclear polarization is dominated by polar scattering at both wavelengths. The same is probably true for NGC 3227. In both NGC 4593 and Mrk 766, there is a large difference between theta(2 mu m) and theta(nu) off-nucleus, where polar scattering is expected to dominate. This may be due to contamination by interstellar polarization in NGC 4593, but there is no clear explanation in the case of the strongly polarized Mrk 766. Lastly, in Mrk 1239, a large change (approximate to 60 degrees) in theta(2 mu m) between the nucleus and the annulus indicates that the unresolved nucleus and its immediate surroundings have different polarization states at 2 mu m, which we attribute to the ESR and PSR, respectively. A further implication is that the source of the scattered 2 mu m emission in the unresolved nucleus is the accretion disk, rather than torus hot dust emission.en
dc.language.isoeng
dc.relation.ispartofThe Astrophysical Journal
dc.subjectgalaxies: nuclei
dc.subjectgalaxies: Seyfert
dc.subjectinfrared: galaxies
dc.subjectpolarization
dc.subjectscattering
dc.subjecttechniques: polarimetric
dc.titleNicmos polarimetry of "polar-scattered" seyfert 1 galaxiesen
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionScience & Technology Research Institute
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionSchool of Creative Arts
dc.description.statusPeer reviewed
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1088/0004-637X/738/1/90
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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