Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007an....328.1108h&link_type=abstract
Astronomische Nachrichten, Vol.328, Issue 10, p.1108
Astronomy and Astrophysics
Astronomy
2
Stars: Activity, Stars: Imaging, Stars: Late-Type, Stars: Magnetic Fields, Starspots
Scientific paper
To explain the observed intermingling of polarities in the magnetic field distributions of rapidly rotating stars, surface magnetic flux transport models demand the presence of fast meridional flows. We combine simulations of the pre-eruptive and post-eruptive magnetic flux transport in cool stars to investigate the influence of a fast meridional circulation on the latitudinal eruption pattern of magnetic flux tubes and on the polar magnetic field properties. Magnetic flux tubes rising through the convection zone experience an enhanced latitude-dependent poleward deflection through meridional flows, which renders the wings of stellar butterfly diagrams convex. The larger amount of magnetic flux emerging at higher latitudes supports the intermingling of opposite polarities of polar magnetic fields and yields magnetic flux densities in the polar regions about 20% higher than in the case disregarding the pre-eruptive deflection. Taking the pre-eruptive evolution of magnetic flux into account therefore eases the need for the fast meridional flows predicted by previous investigations.
Holzwarth Volkmar
Jardine Moira M.
Mackay Duncan H.
No associations
LandOfFree
Formation of polar starspots through meridional circulation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Formation of polar starspots through meridional circulation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Formation of polar starspots through meridional circulation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1526680