Magnetic concentrations in stratified turbulence: the negative effective magnetic pressure instability
Number of Authors: 3
2016 (English)In: New Journal of Physics, ISSN 1367-2630, E-ISSN 1367-2630, Vol. 18, 125011Article in journal (Refereed) Published
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
2016. Vol. 18, 125011
stratified turbulence, dynamos, sunspots
IdentifiersURN: urn:nbn:se:su:diva-140414DOI: 10.1088/1367-2630/aa513eISI: 000391599600002OAI: oai:DiVA.org:su-140414DiVA: diva2:1080600