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25 April 2024

» arxiv » 2004.9840

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Laboratory disruption of scaled astrophysical outflows by a misaligned magnetic field
G. Revet ; B. Khiar ; E. Filippov ; C. Argiroffi ; J. Béard ; R. Bonito ; M. Cerchez ; S. N. Chen ; T. Gangolf ; D. P. Higginson ; A. Mignone ; B. Olmi ; M. Ouillé ; S. N. Ryazantsev ; I. Yu. Skobelev ; M. I. Safronova ; M. Starodubtsev ; T. Vinci ; O. Willi ; S. Pikuz ; S. Orlando ; A. Ciardi ; J. Fuchs ;
Date:	21 Apr 2020
Abstract:	The shaping of astrophysical outflows into bright, dense and collimated jets due to magnetic pressure is here investigated using laboratory experiments. We notably look at the impact on jet collimation of a misalignment between the outflow, as it stems from the source, and the magnetic field. For small misalignments, a magnetic nozzle forms and redirects the outflow in a collimated jet. For growing misalignments, this nozzle becomes increasingly asymmetric, disrupting jet formation. Our results thus suggest outflow/magnetic field misalignment to be a plausible key process regulating jet collimation in a variety of objects. Furthermore, they provide a possible interpretation for the observed structuring of astrophysical jets. Jet modulation could be interpreted as the signature of changes over time in the outflow/ambient field angle, and the change in the direction of the jet could be the signature of changes in the direction of the ambient field.
Source:	arXiv, 2004.9840
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