ON THE STRUCTURE AND STABILITY OF MAGNETIC TOWER JETS

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dc.citation.firstpage66en_US
dc.citation.journalTitleThe Astrophysical Journalen_US
dc.citation.lastpage82en_US
dc.citation.volumeNumber757en_US
dc.contributor.authorHuarte-Espinosa, M.en_US
dc.contributor.authorBlackman, E.G.en_US
dc.contributor.authorCiardi, A.en_US
dc.contributor.authorHartigan, P.en_US
dc.contributor.authorLebedev, S.V.en_US
dc.contributor.authorChittenden, J.P.en_US
dc.date.accessioned2013-03-13T19:29:54Z
dc.date.available2014-03-19T05:10:04Z
dc.date.issued2012en_US
dc.description.abstractModern theoretical models of astrophysical jets combine accretion, rotation, and magnetic fields to launch and collimate supersonic flows from a central source. Near the source, magnetic field strengths must be large enough to collimate the jet requiring that the Poynting flux exceeds the kinetic energy flux. The extent to which the Poynting flux dominates kinetic energy flux at large distances from the engine distinguishes two classes of models. In magneto-centrifugal launch models, magnetic fields dominate only at scales 100 engine radii, after which the jets become hydrodynamically dominated (HD). By contrast, in Poynting flux dominated (PFD) magnetic tower models, the field dominates even out to much larger scales. To compare the large distance propagation differences of these two paradigms, we perform three-dimensional ideal magnetohydrodynamic adaptive mesh refinement simulations of both HD and PFD stellar jets formed via the same energy flux.We also compare how thermal energy losses and rotation of the jet base affects the stability in these jets. For the conditions described, we show that PFD and HD exhibit observationally distinguishable features: PFD jets are lighter, slower, and less stable than HD jets. Unlike HD jets, PFD jets develop current-driven instabilities that are exacerbated as cooling and rotation increase, resulting in jets that are clumpier than those in the HD limit. Our PFD jet simulations also resemble the magnetic towers that have been recently created in laboratory astrophysical jet experiments.en_US
dc.embargo.terms1 yearen_US
dc.identifier.citationHuarte-Espinosa, M., Blackman, E.G., Ciardi, A., et al.. "ON THE STRUCTURE AND STABILITY OF MAGNETIC TOWER JETS." <i>The Astrophysical Journal,</i> 757, (2012) The American Astronomical Society: 66-82. http://dx.doi.org/10.1088/0004-637X/757/1/66.
dc.identifier.doihttp://dx.doi.org/10.1088/0004-637X/757/1/66en_US
dc.identifier.urihttps://hdl.handle.net/1911/70570
dc.language.isoengen_US
dc.publisherThe American Astronomical Society
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
dc.subject.keywordISMen_US
dc.subject.keywordjets and outflows – methodsen_US
dc.subject.keywordnumerical – starsen_US
dc.subject.keywordmagnetic field – starsen_US
dc.subject.keywordwindsen_US
dc.subject.keywordoutflowsen_US
dc.titleON THE STRUCTURE AND STABILITY OF MAGNETIC TOWER JETSen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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