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dc.contributor.authorGledhill, T.
dc.contributor.authorChrysostomou, A.
dc.contributor.authorHough, J.
dc.contributor.authorYates, J.A.
dc.date.accessioned2007-07-15T19:25:15Z
dc.date.available2007-07-15T19:25:15Z
dc.date.issued2001-04
dc.identifier.citationGledhill , T , Chrysostomou , A , Hough , J & Yates , J A 2001 , ' Axisymmetry in protoplanetary nebulae: using imaging polarimetry to investigate envelope structure ' , Monthly Notices of the Royal Astronomical Society , vol. 322 , no. 2 , pp. 321-342 . https://doi.org/10.1046/j.1365-8711.2001.04112.x
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 171559
dc.identifier.otherPURE UUID: 71dd138f-fe5b-49ff-8126-21244b4cc8c3
dc.identifier.otherdspace: 2299/219
dc.identifier.otherScopus: 0001243360
dc.identifier.otherORCID: /0000-0002-2859-4600/work/30779789
dc.identifier.urihttp://hdl.handle.net/2299/219
dc.descriptionThe definitive version is available at www.blackwell-synergy.com '. Copyright Blackwell Publishing. DOI: 10.1046/j.1365-8711.2001.04112.x
dc.description.abstractWe use ground-based imaging polarimetry to detect and image the dusty circumstellar envelopes of a sample of proto-planetary nebulae (PPNe) at near-infrared wavelengths. This technique allows the scattered light from the faint envelope to be separated from the glare of the bright central star and is particularly well suited to this class of object. We detect extended (up to 9 arcsec diameter) circumstellar envelopes around 15 out of 16 sources with a range of morphologies including bipolars and shells. The distribution of scattered light in combination with its polarization (up to 40 per cent) provides unambiguous evidence for axisymmetry in 14 objects showing this to be a common trait of PPNe. We suggest that the range of observed envelope morphologies results from the development of an axisymmetric dust distribution during the superwind phase at the end of the AGB. We identify shells seen in polarized light with scattering from these superwind dust distributions which allows us to provide constraints on the duration of the superwind phase. In one object (IRAS 19475+3119) the circumstellar envelope has a two-armed spiral structure which we suggest results from the interaction of the mass losing star with a binary companion.en
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.rightsOpen
dc.titleAxisymmetry in protoplanetary nebulae: using imaging polarimetry to investigate envelope structureen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dcterms.dateAccepted2001-04
rioxxterms.versionofrecordhttps://doi.org/10.1046/j.1365-8711.2001.04112.x
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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