Hostname: page-component-78c5997874-g7gxr Total loading time: 0 Render date: 2024-11-19T12:38:53.840Z Has data issue: false hasContentIssue false
  • English
  • Français

Modelling stellar coronal magnetic fields

Published online by Cambridge University Press:  26 August 2011

Moira Jardine ,
Jean-Francois Donati ,
Doris Arzoumanian  and
Aline de Vidotto
Moira Jardine
Affiliation:
SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, KY16 9SS, UK email: [email protected], [email protected], [email protected]
Jean-Francois Donati
Affiliation:
LATT, CNRS–UMR 5572, Obs. Midi-Pyrénées, 14 Av. E. Belin, F–31400 Toulouse, France email: [email protected]
Doris Arzoumanian
Affiliation:
SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, KY16 9SS, UK email: [email protected], [email protected], [email protected]
Aline de Vidotto
Affiliation:
SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, KY16 9SS, UK email: [email protected], [email protected], [email protected]
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.

Our understanding of the structure and dynamics of stellar coronae has changed dramatically with the availability of surface maps of both star spots and also magnetic field vectors. Magnetic field extrapolations from these surface maps reveal surprising coronal structures for stars whose masses and hence internal structures and dynamo modes may be very different from that of the Sun. Crucial factors are the fraction of open magnetic flux (which determines the spin-down rate for the star as it ages) and the location and plasma density of closed-field regions, which determine the X-ray and radio emission properties. There has been recent progress in modelling stellar coronae, in particular the relative contributions of the field detected in the bright surface regions and the field that may be hidden in the dark star spots. For the Sun, the relationship between the field in the spots and the large scale field is well studied over the solar cycle. It appears, however, that other stars can show a very different relationship.

Keywords

Stars:magnetic fieldsstars:coronaestars:imagingstars:spots
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S273: The Physics of Sun and Star Spots , August 2010 , pp. 242 - 248
Copyright
Copyright © International Astronomical Union 2011

References

Altschuler, M. D. & Newkirk, G. Jr. 1969, Solar Phys., 9, 131CrossRefGoogle Scholar
Arzoumanian, D., Jardine, M., Donati, J., Morin, J., & Johnstone, C. 2010, ArXiv e-printsGoogle Scholar
Braithwaite, J. & Nordlund, A. 2006, Astron. Astrophys, 450, 1077CrossRefGoogle Scholar
Braithwaite, J. & Spruit, H. C. 2004, Nature, 431, 819CrossRefGoogle Scholar
Browning, M. K. 2008, Astrophys. J., 676, 1262CrossRefGoogle Scholar
Brun, A. S., Browning, M. K., & Toomre, J. 2005, Astrophys. J., 629, 461CrossRefGoogle Scholar
Cattaneo, F. 1999, Astrophys. J., 515, L39CrossRefGoogle Scholar
Chabrier, G. & Küker, M. 2006, Astron. Astrophys, 446, 1027CrossRefGoogle Scholar
Charbonneau, P. & MacGregor, K. B. 2001, Astrophys. J., 559, 1094Google Scholar
Cohen, O., Drake, J. J., Kashyap, V. L., Hussain, G. A. J., & Gombosi, T. I. 2010, ArXiv e-printsGoogle Scholar
Dobler, W., Stix, M., & Brandenburg, A. 2006, Astrophys. J., 638, 336CrossRefGoogle Scholar
Donati, J., Morin, J., Petit, P., et al. 2008a, Mon. Not. Roy. Astron. Soc., 390, 545CrossRefGoogle Scholar
Donati, J.-F. 2001, LNP Vol. 573: Astrotomography, Indirect Imaging Methods in Observational Astronomy, 573, 207Google Scholar
Donati, J.-F. & Collier Cameron, A. 1997, Mon. Not. Roy. Astron. Soc., 291, 1CrossRefGoogle Scholar
Donati, J.-F., Collier Cameron, A., Hussain, G., & Semel, M. 1999, Mon. Not. Roy. Astron. Soc., 302, 437CrossRefGoogle Scholar
Donati, J.-F., Jardine, M. M., Gregory, S. G., et al. 2007, Mon. Not. Roy. Astron. Soc., 380, 1297CrossRefGoogle Scholar
Donati, J.-F., Jardine, M. M., Gregory, S. G., et al. 2008b, Mon. Not. Roy. Astron. Soc., 386, 1234CrossRefGoogle Scholar
Durney, B. R., De Young, D. S., & Roxburgh, I. W. 1993, Solar Phys., 145, 207CrossRefGoogle Scholar
Gregory, S. G., Jardine, M., Cameron, A. C., & Donati, J.-F. 2006a, Mon. Not. Roy. Astron. Soc., 373, 827CrossRefGoogle Scholar
Gregory, S. G., Jardine, M., Gray, C. G., & Donati, J. 2010, ArXiv e-printsGoogle Scholar
Gregory, S. G., Jardine, M., Simpson, I., & Donati, J.-F. 2006b,Mon. Not. Roy. Astron. Soc., 371, 999CrossRefGoogle Scholar
Gregory, S. G., Matt, S. P., Donati, J., & Jardine, M. 2008, Mon. Not. Roy. Astron. Soc., 389, 1839CrossRefGoogle Scholar
Hussain, G. A. J., Collier Cameron, A., Jardine, M. M., et al. 2009, Mon. Not. Roy. Astron. Soc., 398, 189CrossRefGoogle Scholar
Hussain, G. A. J., van Ballegooijen, A. A., Jardine, M., & Collier Cameron, A. 2002, Astrophys. J., 575, 1078CrossRefGoogle Scholar
Ignace, R., Oskinova, L. M., Jardine, M., et al. 2010, ArXiv e-printsGoogle Scholar
Jardine, M., Barnes, J., Donati, J.-F., & Collier Cameron, A. 1999, Mon. Not. Roy. Astron. Soc., 305, L35CrossRefGoogle Scholar
Jardine, M., Collier Cameron, A., & Donati, J.-F. 2002a, Mon. Not. Roy. Astron. Soc., 333, 339CrossRefGoogle Scholar
Jardine, M., Collier Cameron, A., Donati, J.-F., Gregory, S. G., & Wood, K. 2006, Mon. Not. Roy. Astron. Soc., 367, 917CrossRefGoogle Scholar
Jardine, M., Collier Cameron, A., Donati, J.-F., & Pointer, G. 2001, MNRAS, 324, 201CrossRefGoogle Scholar
Jardine, M., Wood, K., Collier Cameron, A., Donati, J.-F., & Mackay, D. H. 2002b, Mon. Not. Roy. Astron. Soc., 336, 1364CrossRefGoogle Scholar
Jardine, M. M., Gregory, S. G., & Donati, J. 2008, Mon. Not. Roy. Astron. Soc., 386, 688CrossRefGoogle Scholar
Johnstone, C., Jardine, M., & Mackay, D. H. 2010, Mon. Not. Roy. Astron. Soc., 404, 101Google Scholar
Küker, M. & Rüdiger, G. 1997, Astron. Astrophys, 328, 253Google Scholar
Küker, M. & Rüdiger, G. 1999, in ASP Conf. Ser. 178: Workshop on stellar dynamos, Vol. 178, 87–96Google Scholar
MacDonald, J. & Mullan, D. J. 2004, Mon. Not. Roy. Astron. Soc., 348, 702CrossRefGoogle Scholar
Maeder, A. & Meynet, G. 2005, Astron. Astrophys, 440, 1041CrossRefGoogle Scholar
McIvor, T., Jardine, M., Cameron, A. C., Wood, K., & Donati, J.-F. 2003, Mon. Not. Roy. Astron. Soc., 345, 601CrossRefGoogle Scholar
Morin, J., Donati, J., Petit, P., et al. 2008, Mon. Not. Roy. Astron. Soc., 390, 567CrossRefGoogle Scholar
Morin, J., Donati, J., Petit, P., et al. 2010, Mon. Not. Roy. Astron. Soc., 1077Google Scholar
Moss, D. 2001, in ASP Conference Series, Vol. 248, Magnetic fields across the Hertzsprung-Russell diagram, ed. Mathys, S. G. & Wickramasinghe, D. (San Francisco), 305Google Scholar
Mullan, D. J. & MacDonald, J. 2005, Mon. Not. Roy. Astron. Soc., 356, 1139Google Scholar
Spruit, H. 2002, Astron. Astrophys, 381, 923CrossRefGoogle Scholar
Strassmeier, K. G. 2009, A. Ast. Rev., 17, 251Google Scholar
Tout, C. A. & Pringle, J. E. 1995, Mon. Not. Roy. Astron. Soc., 272, 528CrossRefGoogle Scholar
Vidotto, A., Jardine, M., Opher, M., Donati, J.-F., & Gombosi, T. I. 2010, Mon. Not. Roy. Astron. Soc. (in press)Google Scholar