Abstract
Mode trapping of high-radial order gravity modes was found for a particular sdO model. The trapping is caused by the change in composition from the helium radiative shell to the hydrogen burning shell. A non-adiabatic effect of this trapping is the higher tendency to instability of the trapped modes. Low- to intermediate-radial order pressure modes (in sdO models they correspond to mixed modes with most nodes in the P-mode region) are found to be trapped by the chemical transition from the carbon-oxygen core to the He burning shell. As the trapping is produced in the deep interior of the star, where energy interchange is negligible at the p-mode frequencies, it has no particular effect on the driving.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Brassard, P., Fontaine, G., Wesemael, F., Hansen, C.J.: Astrophys. J. Suppl. Ser. 80, 369 (1992)
Charpinet, S., Fontaine, G., Brassard, P., Dorman, B.: Astrophys. J. Suppl. Ser. 131, 223 (2000)
Dziembowski, W.A.: Acta Astron. 21, 289 (1971)
Fontaine, G., Brassard, P., Green, E.M., Chayer, P., Charpinet, S., Andersen, M., Portouw, J.: Astron. Astrophys. 486, L39 (2008)
Kawaler, S.D., Bradley, P.A.: Astrophys. J. 427, 415 (1994)
Lawlor, T.M., MacDonald, J.: Mon. Not. R. Astron. Soc. 371, 263 (2006)
Miglio, A., Montalbán, J., Noels, A., Eggenberger, P.: Mon. Not. R. Astron. Soc. 386, 1487 (2008)
Moya, A., Garrido, R.: Astrophys. Space Sci. 316, 129 (2008)
Moya, A., Garrido, R., Dupret, M.-A.: Astron. Astrophys. 414, 1081 (2004)
Rodríguez-López, C., Moya, A., Garrido, R., MacDonald, J., Oreiro, R., Ulla, A.: Mon. Not. R. Astron. Soc. 402, 295 (2010), Paper I
Ströer, A., Heber, U., Lisker, T., Napiwotzki, R., Dreizler, S., Christlieb, N., Reimers, D.: Astron. Astrophys. 462, 269 (2007)
Winget, D.E., Van Horn, H.M., Hansen, C.J.: Astrophys. J. 245, L33 (1981)
Woudt, P.A., et al.: Mon. Not. R. Astron. Soc. 371, 1497 (2006)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Rodríguez-López, C., Moya, A., Garrido, R. et al. Mode trapping in sdO models. Astrophys Space Sci 329, 205–209 (2010). https://doi.org/10.1007/s10509-010-0325-y
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10509-010-0325-y