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Coronal influence on dynamos
Stockholm University, Sweden.
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA. Stockholm University, Sweden.ORCID iD: 0000-0002-7304-021X
2014 (English)In: Magnetic fields throughout stellar evolution: Proceedings of the 302nd Symposium of the International Astronomical Union held in Biarritz, France, August 25-30, 2013, Cambridge University Press, 2014, no S302, 134-137 p.Conference paper, Published paper (Refereed)
Abstract [en]

We report on turbulent dynamo simulations in a spherical wedge with an outer coronal layer. We apply a two-layer model where the lower layer represents the convection zone and the upper layer the solar corona. This setup is used to study the coronal influence on the dynamo action beneath the surface. Increasing the radial coronal extent gradually to three times the solar radius and changing the magnetic Reynolds number, we find that dynamo action benefits from the additional coronal extent in terms of higher magnetic energy in the saturated stage. The flux of magnetic helicity can play an important role in this context.

Place, publisher, year, edition, pages
Cambridge University Press, 2014. no S302, 134-137 p.
Series
Proceedings of the International Astronomical Union, ISSN 1743-9213 ; Volume 9, Issue S302
Keyword [en]
MHD, Sun: activity, Sun: corona, Sun: magnetic fields, Sun: rotation, turbulence
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-161689DOI: 10.1017/S1743921314001884Scopus ID: 2-s2.0-84905754701ISBN: 978-110704498-2 (print)OAI: oai:DiVA.org:kth-161689DiVA: diva2:798171
Conference
The 302nd Symposium of the International Astronomical Union held in Biarritz, France, August 25-30, 2013
Note

QC 20150326

Available from: 2015-03-26 Created: 2015-03-13 Last updated: 2015-03-26Bibliographically approved

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Brandenburg, Axel

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
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  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
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Output format
  • html
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  • asciidoc
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