Hostname: page-component-78c5997874-xbtfd Total loading time: 0 Render date: 2024-11-14T06:03:50.253Z Has data issue: false hasContentIssue false
  • English
  • Français

Convection and dynamo action in B stars

Published online by Cambridge University Press:  12 August 2011

Kyle C. Augustson ,
Allan S. Brun  and
Juri Toomre
Kyle C. Augustson
Affiliation:
JILA & APS, University of Colorado, 440 UCB, Boulder, CO, 80309-0440, USA
Allan S. Brun
Affiliation:
UMR AIM CEA-CNRS-Univ. P7 CEA Saclay, 91191 Gif-sur-Yvette Cedex, France
Juri Toomre
Affiliation:
JILA & APS, University of Colorado, 440 UCB, Boulder, CO, 80309-0440, USA
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Main-sequence massive stars possess convective cores that likely harbor strong dynamo action. To assess the role of core convection in building magnetic fields within these stars, we employ the 3-D anelastic spherical harmonic (ASH) code to model turbulent dynamics within a 10 M⊙ main-sequence (MS) B-type star rotating at 4 Ω⊙. We find that strong (900 kG) magnetic fields arise within the turbulence of the core and penetrate into the stably stratified radiative zone. These fields exhibit complex, time-dependent behavior including reversals in magnetic polarity and shifts between which hemisphere dominates the total magnetic energy.

Keywords

stars: early typerotationmagnetic fields
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S271: Astrophysical Dynamics: From Stars to Galaxies , June 2010 , pp. 361 - 362
Copyright
Copyright © International Astronomical Union 2011

References

Brun, A. S., Miesch, M. S., & Toomre, J. 2004, ApJ, 614, 1073Google Scholar
Brun, A. S., Browning, M. K., & Toomre, J. 2005, ApJ, 629, 461Google Scholar
Donati, J.-F. & Landstreet, J. D. 2009, ARAA, 47, 333Google Scholar
Featherstone, N. A., Browning, M. K., Brun, A. S., & Toomre, J. 2009, ApJ, 705, 1000Google Scholar
Gallet, B. & Pétrélis, F. 2009, Phys. Rev. E, 80, 3Google Scholar