Overshooting in Massive Stars: Conceptual Problems and Suggested Solution

Details Overshooting in Massive Stars: Conceptual Problems and Suggested Solution Overshooting in Massive Stars: Conceptual Problems and Suggested Solution

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999apj...518l.119c&link_type=abstract

The Astrophysical Journal, Volume 518, Issue 2, pp. L119-L122.

Astronomy and Astrophysics

Astronomy

6

Convection, Stars: Evolution, Stars: Interiors

Scientific paper

Overshooting (OV) in massive stars faces a basic difficulty: what theoretical models offer is not what stellar structure studies need. The former use ▽_mu=0 and define the OV where the negative convective flux J vanishes, while the latter need to know where the concentration flux J_c vanishes. We suggest that J may be dynamically irrelevant and derive the new dynamic equations for J_c. A new feature emerges: for large concentration gradients ▽C, J_c is no longer proportional to ▽C, as always assumed.

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