Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...282..274d&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 282, July 1, 1984, p. 274-286. Research supported by the U.S. Department of
Astronomy and Astrophysics
Astrophysics
26
Convective Flow, Helium, Nuclear Fusion, Stellar Cores, Stellar Evolution, Stellar Oscillations, Computerized Simulation, Stellar Models, Temperature Inversions, Three Dimensional Flow, Two Dimensional Flow
Scientific paper
The effects arising from the time-dependent interaction of convection and the thermonuclear runaway of the core helium flash found previously with coarsely zoned two-dimensional calculations are studied with much more finely zoned two-dimensional and with three-dimensional calculations. These effects include: (1) a cyclic behavior in the strength of both the thermonuclear runaway and convection caused by the failure of convection to adjust instantaneously to the runaway, (2) extensive convective overshooting across the strong temperature innversion into the inner core, (3) the rapid convective heating of the inner core, (4) large (more than a few percent) nonspherical temperature variations, and (5) the eventual failure of convection to contain the runaway. All of these effects are confirmed by the more refined calculations. Implications of these effects are discussed.
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