Helical magnetic fields associated with the relativistic jets of four BL Lac objects

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dc.contributor.author Gabuzda, Denise
dc.contributor.author Murray, Éamonn D.
dc.contributor.author Cronin, Patrick
dc.date.accessioned 2017-11-07T09:38:58Z
dc.date.available 2017-11-07T09:38:58Z
dc.date.issued 2004
dc.identifier.citation Gabuzda, D. C., Murray, É. and Cronin, P. (2004) 'Helical magnetic fields associated with the relativistic jets of four BL Lac objects', Monthly Notices of the Royal Astronomical Society, 351(4), pp. L89-L93. doi: 10.1111/j.1365-2966.2004.08037.x en
dc.identifier.volume 351
dc.identifier.issued 4
dc.identifier.startpage L89
dc.identifier.endpage L93
dc.identifier.issn 0035-8711
dc.identifier.uri http://hdl.handle.net/10468/4987
dc.identifier.doi 10.1111/j.1365-2966.2004.08037.x
dc.description.abstract Evidence has been mounting that many of the transverse jet B fields observed in BL Lac objects on parsec scales represent the dominant toroidal component of the intrinsic jet B fields. Such fields could come about, for example, as a result of the 'winding up' of an initial 'seed' field with a significant longitudinal component by the rotation of the central accreting object. If this is the case, this should give rise to gradients in the rotation measure across the jets, due to the systematic change in the line-of-sight component of the jet B field. We present evidence for transverse rotation measure gradients in four BL Lac objects, strengthening arguments that the jets of these objects do indeed have toroidal or helical B fields. This underlines the view of the jets as fundamentally electromagnetic structures, and suggests that they may well carry non-zero currents. It also provides a natural means to collimate the jets. en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Oxford University Press en
dc.relation.uri https://academic.oup.com/mnras/article-lookup/doi/10.1111/j.1365-2966.2004.08037.x
dc.rights © 2004, Royal Astronomical Society en
dc.subject Magnetic fields en
dc.subject Polarization en
dc.subject Radio continuum en
dc.subject Galaxies en
dc.title Helical magnetic fields associated with the relativistic jets of four BL Lac objects en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Denise Gabuzda, Physics, University College Cork, Cork, Ireland. +353-21-490-3000 Email: d.gabuzda@ucc.ie en
dc.internal.availability Full text available en
dc.description.version Published Version en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Monthly Notices of the Royal Astronomical Society en
dc.internal.IRISemailaddress d.gabuzda@ucc.ie en

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