AAS 197, January 2001
Session 81. Supernovae and Nova Theory
Display, Wednesday, January 10, 2001, 9:30am-7:00pm, Exhibit Hall

[Previous] | [Session 81] | [Next]

[81.06] Pre-nova Mixing at the Surface of White Dwarfs

R. Rosner (The University of Chicago), Y.N. Young (Northwestern University), A. Alexakis, L.J. Dursi, J. Truran, A.C. Calder, B. Fryxell, K. Olson, P.M. Ricker, F.X. Timmes, M. Zingale, H.M. Tufo (The University of Chicago), P. MacNeice (NASA/Goddard Space Flight Center)

We report on studies of shear-driven mixing at the interface between a hydrogen-helium envelope and the carbon-oxygen surface of a pre-nova outburst white dwarf. Linear theory shows distinct regimes of unstable gravity surface waves and Kelvin-Helmholtz modes, which we follow into the weakly nonlinear regime by analytical techniques; we then follow the fully nonlinear evolution to the point of wave breaking, using the Chicago Flash Code. We also report on estimates of the mixing efficiency resulting from the combination of weakly driven convection and wave breaking; and discuss their implications for nova outbursts.

This work was supported by the DOE ASCI/Alliances program at the University of Chicago, under grant No. B341495.

If you would like more information about this abstract, please follow the link to http://flash.uchicago.edu. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

[Previous] | [Session 81] | [Next]