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dc.contributor.authorBains, I.
dc.contributor.authorRichards, A.M.S.
dc.contributor.authorGledhill, T.
dc.contributor.authorYates, J.A.
dc.identifier.citationBains , I , Richards , A M S , Gledhill , T & Yates , J A 2004 , ' MERLIN polarimetry of the OH masers in IRAS 20406+2953 ' , Monthly Notices of the Royal Astronomical Society , vol. 354 , no. 2 , pp. 529-542 .
dc.identifier.otherPURE: 175814
dc.identifier.otherPURE UUID: 38caacbf-d7c7-49bd-a97a-3ea04e0014b2
dc.identifier.otherdspace: 2299/4271
dc.identifier.otherScopus: 7044272696
dc.identifier.otherORCID: /0000-0002-2859-4600/work/30779777
dc.description‘The definitive version is available at '. Copyright Blackwell Publishing. [Full text of this article is not available in the UHRA]
dc.description.abstractWe present the third in a series of results from our programme of the detection and measurement of magnetic fields in protoplanetary nebulae (PPN), using full-polarization MERLIN observations of OH masers. These are the first maps of the OH 1612- and 1667-MHz masing emission from IRAS 20406+2953. We have identified a Zeeman pair in the 1612-MHz data; this result heralds the second magnetic field strength measured in a PPN. We show that the field, of strength −3.1 mG, is sufficiently strong to be shaping the outflowing mass from the star. By considering the spatial distribution of the masers and the structure of the linear polarization data, we suggest a field configuration that is toroidal. The observed change in polarization position angle between the peak red- and blueshifted components of the maser features, if attributed to Faraday rotation within the circumstellar envelope, gives an electron density of ∼1 cm−3. We show that this is sufficient to freeze the field into the outflowing wind.en
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.titleMERLIN polarimetry of the OH masers in IRAS 20406+2953en
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
rioxxterms.typeJournal Article/Review

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