Skip to main content Accessibility help
×
Home

The Solar-stellar Connection: Magnetic Braking and Stellar Activity

  • L. Mestel (a1)

Abstract

The theory of coronal structure and of the associated angular momentum transport by magneto-thermo-centrifugal winds is reviewed, with reference to recent observations of rapidly rotating late-type stars. In particular, the combined optical and X-ray studies of AB Doradus are consistent with the predicted picture of a hot, magnetically-controlled ‘dead zone’ in near corotation with the star, and of cooler wind-emitting regions (analogues of the solar coronal holes). The standard theory predicts a rate of angular momentum transport that depends on the extent of the wind zone, the relative importance of thermal and centrifugal driving, and the variation of the dynamo-built surface field with rotation. For stars like the Sun, with approximately one tenth of the mass in the convective envelope, detailed comparison of the theory with the observed rotations of stars in clusters of different ages is sensitive to the strength of the coupling between the envelope and the radiative core, and is constrained by helioseismological limitations on rotational shear within the present-day Sun. An inferred strong braking during the early epochs may hint at a non-standard braking model, with the Maxwell stresses dominant far from as well as near the stellar surface.

    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      The Solar-stellar Connection: Magnetic Braking and Stellar Activity
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      The Solar-stellar Connection: Magnetic Braking and Stellar Activity
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      The Solar-stellar Connection: Magnetic Braking and Stellar Activity
      Available formats
      ×

Copyright

References

Hide All
Barker, D.M., 1991, DPhil thesis, Univ. of Sussex, Brighton, England.
Collier Cameron, A., Bedford, D.K., Rucinski, S.M., Vilhu, O. and White, N.E., 1988, Mon. Not. R. astr. Soc, 231, 131.
Collier Cameron, A., Duncan, D.K., Ehrenfreund, P., Foing, B.H., Kuntz, K.D., Penston, M.V., Robinson, R.D. and Soderblom, D.R., 1990, Mon. Not. R. astr. Soc, 247, 415.
Goldreich, P. and Julian, W.H., 1970, Astrophys. J., 261, 279.
Gray, D.F., 1982, Astrophys. J., 261, 259.
Havnes, O. et al. (eds.), 1988, Activity in Cool Star Envelopes, Kluwer, Dordrecht.
Lust, R. and Schluter, A., 1955, Zeits. f. Astrophys., 38, 190.
McGregor, K.B., 1991, in Angular Momentum Evolution of Young Stars, Catalano, S. and Stauffer, J.R. (eds), Kluwer, Dordrecht.
Mestel, L., 1967, in Plasma Astrophysics, Sturrock, P.A. (ed), Academic Press, London.
Mestel, L., 1968, Mon. Not. R. astr. Soc., 138, 359.
Mestel, L. and Spitzer, L., 1956, Mon. Not. R. astr. Soc., 116, 583.
Mestel, L. and Spruit, H.C., 1987, Mon. Not. R. astr. Soc, 226, 57.
Mestel, L. and Weiss, N.O., 1987, Mon. Not. R. astr. Soc, 226, 123.
Nakano, T.C., 1976, Pub. astr. Soc. Japan, 28, 355.
Noyes, R.W., Hartmann, L.W., Baliunas, S.L., Duncan, D.K. and Vaughan, A.H., 1984, Astrophys. J., 279, 763.
Parker, E.N., 1963, Interplanetary Dynamical Processes, Interscience, New York.
Pizzo, V., Schwenn, R., Marsch, E., Rosenbauer, H., Mühlhäuser, K-H and Neubauer, F.M., 1983, Astrophys. J., 271, 335.
Pneuman, G. and Kopp, R.A., 1971, Sol. Phys., 18, 258.
Sakurai, T., 1985, Astr. Astrophys., 152, 121.
Schatzman, E., 1962, Ann. Astrophys., 25, 18.
Skumanich, A., 1972, Astrophys. J., 171, 565.
Stauffer, J.R., 1991, in Angular Momentum Evolution of Young Stars, Catalano, S. and Stauffer, J.R. (eds), Kluwer, Dordrecht.
Stauffer, J.R. and Hartmann, L.W., 1987, Astrophys. J., 318, 337.
Tayler, R.J., 1987, Mon. Not. R. astr. Soc., 227, 553.
Vilhu, O., 1984, Astr. Astrophys., 133, 117.
Weber, E.J. and Davis, L., 1967, Astrophys. J., 148, 217.

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed