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

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dc.contributor.authorGabuzda, Denise
dc.contributor.authorMurray, Éamonn D.
dc.contributor.authorCronin, Patrick
dc.date.accessioned2017-11-07T09:38:58Z
dc.date.available2017-11-07T09:38:58Z
dc.date.issued2004
dc.description.abstractEvidence 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.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationGabuzda, 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.xen
dc.identifier.doi10.1111/j.1365-2966.2004.08037.x
dc.identifier.endpageL93
dc.identifier.issn0035-8711
dc.identifier.issued4
dc.identifier.journaltitleMonthly Notices of the Royal Astronomical Societyen
dc.identifier.startpageL89
dc.identifier.urihttps://hdl.handle.net/10468/4987
dc.identifier.volume351
dc.language.isoenen
dc.publisherOxford University Pressen
dc.relation.urihttps://academic.oup.com/mnras/article-lookup/doi/10.1111/j.1365-2966.2004.08037.x
dc.rights© 2004, Royal Astronomical Societyen
dc.subjectMagnetic fieldsen
dc.subjectPolarizationen
dc.subjectRadio continuumen
dc.subjectGalaxiesen
dc.titleHelical magnetic fields associated with the relativistic jets of four BL Lac objectsen
dc.typeArticle (peer-reviewed)en
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