Hostname: page-component-7bb8b95d7b-nptnm Total loading time: 0 Render date: 2024-09-22T06:21:12.316Z Has data issue: false hasContentIssue false
  • English
  • Français

Linking Thin Flux Tube MHD Models to Apparent Stellar Surface Activity

Published online by Cambridge University Press:  26 May 2016

T. Granzer  and
K. G. Strassmeier
T. Granzer
Affiliation:
Astrophysikalisches Institut Potsdam, An der Sternwarte 16, D-14482 Potsdam, Germany
K. G. Strassmeier
Affiliation:
Astrophysikalisches Institut Potsdam, An der Sternwarte 16, D-14482 Potsdam, Germany

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.

We model thin magnetic flux tubes as they rise from the bottom of a stellar convection zone to the photosphere. On emergence they form active regions, i.e. star spots. This model was very successfully applied to the solar case, where the simulations where in agreement with the butterfly diagram, Joy's law, and Hale's law. We propose the use of a similar model to describe stellar activity in the more extreme form found on active stars. A comparison between Doppler-images of well-observed pre-MS stars and a theoretically derived probability of star-spot formation as a function of latitude is presented.

Type
Part 10: Structural Elements: Magnetic Loops
Information
Symposium - International Astronomical Union , Volume 219: Stars as Suns : Activity, Evolution and Planets , 2004 , pp. 546 - 551
Copyright
Copyright © Astronomical Society of the Pacific 2004 

References

Caligari, P., Moreno-Insertis, F., & Schüssler, M. 1995, ApJ, 441, 886.CrossRefGoogle Scholar
Choudhuri, A. R., & Gilman, P. A. 1987, ApJ, 316, 788.CrossRefGoogle Scholar
Donati, J.-F. 1999, MNRAS, 302, 457.CrossRefGoogle Scholar
Donati, J.-F., Collier-Cameron, A., Hussain, G. A. J., & Semel, M. 1999, MNRAS, 302, 437.CrossRefGoogle Scholar
Fan, Y., Fisher, G., & DeLuca, E. E. 1993, ApJ, 405, 390.CrossRefGoogle Scholar
Granzer, Th., Caligari, P., Schüssler, M., & Strassmeier, K. G. 2000, A&A, 355, 1087.Google Scholar
Kürster, M., Schmitt, J. H. M. M., & Cutispoto, G. 1994, A&A 289, 899.Google Scholar
Neuhäuser, R., Wolk, S. J., Torres, G., et al. 1998, A&A, 334, 873.Google Scholar
Rice, J. B., & Strassmeier, K. G. 1996, A&A, 316, 164.Google Scholar
Schüssler, M., Caligari, P., Ferriz-Mas, A., Solanki, S. K., & Stix, M. 1996, A&A, 314, 503.Google Scholar
Schüssler, M., & Solanki, S. K. 1992, A&A, 264, L13.Google Scholar
Spruit, H. C. 1981, A&A, 98, 155.Google Scholar
Unruh, Y. C., Collier-Cameron, A., & Cutispoto, G. 1995, MNRAS, 277, 1145.CrossRefGoogle Scholar