Skip to main content Accessibility help
×
Home

Helium diffusion in rapidly oscillating Ap stars

  • N. Dolez (a1) (a2), D. O. Gough (a1) (a2) and S. Vauclair (a1) (a2)

Abstract

Suppression of convection near the poles of magnetic A stars and inhibition of winds near the equator influence chemical composition gradients resulting from diffusion, leading to appreciable horizontal variation in the equilibrium configurations of the stars. We conjecture that it is this variation which is responsible for the apparent alignment of non-radial pulsations with the magnetic axes of the stars, and also for a possible previous misidentification of the modes. We suggest that nonadiabatic excitation can be sufficient to overcome energy leakage into the atmosphere.

    • 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.

      Helium diffusion in rapidly oscillating Ap stars
      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.

      Helium diffusion in rapidly oscillating Ap stars
      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.

      Helium diffusion in rapidly oscillating Ap stars
      Available formats
      ×

Copyright

References

Hide All
Borra, E.F., Landstreet, J.D. and Mestel, L. 1982 Ann. Rev. Astron. Astrophys. 20, 191220
Dolez, N. and Gough, D.O. 1982 Pulsations in classical and cataclysmic variable stars (ed. Cox, J.P. & Hanson, C.J., JILA, Boulder) 248256
Dziembowski, W.A. and Goode, P. 1985 Astrophys. J. Lett. 296, L27L30
Dziembowski, W.A. and Goode, P. 1986 Seismology of the sun and the distant stars (ed. Gough, D.O., NATO ASI Series C169, Reidel, Dordrecht) 441451
Gabriel, G., Noels, A., Scuflaire, R. and Mathys, G. 1985 Astron. Astrophys., 143, 206208
Gough, D.O. and Taylor, P.P. 1984 Mem. Soc. astr. Italiana, 55, 215226
Kurtz, D.W. 1982 Mon. Not. R. astr. Soc. 200, 807859
Kurtz, D.W. and Seeman, J. 1983 Mon. Not. R. astr. Soc., 205, 1122
Kurtz, D.W., Schneider, H. and Weiss, W.W. 1985 Mon. Not. R. astr. Soc., 715–82
Latour, J., Spiegel, E.A., Toomre, J. and Zahn, J-P. 1976 Astrophys. J., 207, 233243
Shibahashi, H. 1984 Mem. Soc. astr. Italiana, 55, 181183
Shibahashi, H. and Saio, H. 1985 Publ. Astr. Soc. Japan, 37, 245259
Vauclair, S. 1975 Astron. Astrophys., 45, 233235

Helium diffusion in rapidly oscillating Ap stars

  • N. Dolez (a1) (a2), D. O. Gough (a1) (a2) and S. Vauclair (a1) (a2)

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