Internal-gravitational energy during the hydrostatic re-adjustmentįollowing the flash) is much shorter (i.e. Inter-shell convection zone to the surface. Of a percent) throughout the envelope, from the top of the remnant Surface luminosity maximum the outward-flowing luminosity, Wood & Zarro (1981) and Wood (1981) pointed out that at the Is described, and the results for several values of the stellar massĪnd metallicity are presented. The convective envelope during the dredge-up events. Namely the behaviour of the peak luminosity Which are relevant to our analysis on the occurrence of the dredge-up, 3.1 and 3.2 below we recall and discuss the features Inter-shell convection zone during the flash. Penetrate into the carbon enriched region previously occupied by the ( Wood 1981 Wood & Zarro 1981 Boothroyd & Sackmann 1988d).ĭredge-up takes place if the envelope convection zone is able to Pulse cycle, occurs when the surface luminosity attains its The maximum inward penetration of the envelope convection, over the Provided by detailed calculations of thermal pulses. With, it is necessary to consider some indications about the dredge-up In this section we illustrate the adopted scheme which replaces the
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