On the convective envelope of AGB stars
V. Castellani 1, 2,
M. Marconi 1, 3 and
O. Straniero 4
Received 26 February 1998 / Accepted 28 July 1998
We discuss evolutionary computations investigating the efficiency of the convective "drift" which should affect the location of the inner boundary of the convective envelope in cool giant stars. We find that the drift is at the work in structures undergoing the second dredge up, accelerating the sinking of the envelope into the inner He rich layers and producing smaller C-O cores at the onset of thermal pulses or at the C-ignition. However, such differences appear rather small, with mild consequences on the overall evolutionary scenario.
Key words: convection stars: evolution stars: interiors stars: AGB and post-AGB
Send offprint requests to: M. Marconi, Dipartimento di Fisica Università di Pisa, Piazza Torricelli 2, I-56126 Pisa, Italy (firstname.lastname@example.org)
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© European Southern Observatory (ESO) 1998
Online publication: November 3, 1998