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Magnetic concentrations in stratified turbulence: The negative effective magnetic pressure instability
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA.ORCID iD: 0000-0002-7304-021X
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA.
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA.
2016 (English)In: New Journal of Physics, ISSN 1367-2630, E-ISSN 1367-2630, Vol. 18, no 12, article id 125011Article in journal (Refereed) Published
Abstract [en]

In the presence of strong density stratification, hydromagnetic turbulence attains qualitatively new properties: the formation of magnetic flux concentrations. We review here the theoretical foundations of this mechanism in terms of what is now called the negative effective magnetic pressure instability. We also present direct numerical simulations of forced turbulence in strongly stratified layers and discuss the qualitative and quantitative similarities with corresponding mean-field simulations. Finally, the relevance to sunspot formation is discussed.

Place, publisher, year, edition, pages
Institute of Physics Publishing (IOPP), 2016. Vol. 18, no 12, article id 125011
Keywords [en]
dynamos, stratified turbulence, sunspots
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-201169DOI: 10.1088/1367-2630/aa513eISI: 000391599600002Scopus ID: 2-s2.0-85007591236OAI: oai:DiVA.org:kth-201169DiVA, id: diva2:1073056
Note

QC 20170209

Available from: 2017-02-09 Created: 2017-02-09 Last updated: 2017-11-29Bibliographically approved

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Brandenburg, AxelRogachevskii, IgorKleeorin, Nathan I.
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