Coronal influence on dynamos
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 (Refereed)
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.
, Proceedings of the International Astronomical Union, ISSN 1743-9213 ; Volume 9, Issue S302
MHD, Sun: activity, Sun: corona, Sun: magnetic fields, Sun: rotation, turbulence
IdentifiersURN: urn:nbn:se:kth:diva-161689DOI: 10.1017/S1743921314001884ScopusID: 2-s2.0-84905754701ISBN: 978-110704498-2OAI: oai:DiVA.org:kth-161689DiVA: diva2:798171
The 302nd Symposium of the International Astronomical Union held in Biarritz, France, August 25-30, 2013
QC 201503262015-03-262015-03-132015-03-26Bibliographically approved