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2017•arXiv (Cornell University)Open access

Overshoot Inwards from the Bottom of the Intershell Convective Zone in (S)AGB stars

John C. Lattanzio, Christopher A. Tout, E.V. Neumerzhitckii, Amanda I. Karakas, P. Lesaffre

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Abstract

We estimate the extent of overshooting inwards from the bottom of the intershell convective zone in thermal pulses in (S)AGB stars. We find that the buoyancy is so strong that any overshooting should be negligible. The temperature inversion at the bottom of the convective zone adds to the stability of the region. Any mixing that occurs in this region is highly unlikely to be due to convective overshooting, and so must be due to another process.

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We estimate the extent of overshooting inwards from the bottom of the intershell convective zone in thermal pulses in (S)AGB stars. We find that the buoyancy is so strong that any overshooting should be negligible. The temperature inversion at the bottom of the convective zone adds to the stability of the region. Any mixing that occurs in this region is highly unlikely to be due to convective overshooting, and so must be due to another process.

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Available abstract

We estimate the extent of overshooting inwards from the bottom of the intershell convective zone in thermal pulses in (S)AGB stars. We find that the buoyancy is so strong that any overshooting should be negligible. The temperature inversion at the bottom of the convective zone adds to the stability of the region. Any mixing that occurs in this region is highly unlikely to be due to convective overshooting, and so must be due to another process.

Key concepts: Convective mixing, Convection, Convection zone, Buoyancy, Stars, Thermal, Overshoot (microwave communication), Mixing (physics)

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