Third Dredge-Up · TP-AGB Star
unseel.com · helium-shell flash · carbon & s-process to the surface
Pulse 0
C/O ratio 0.55
Phase
C–O core (degenerate)
He-burning shell / flash
Intershell (¹²C, s-process)
H-burning shell
Convective envelope
Unseel.com · The Third Dredge-Up: How AGB Stars Bring Carbon and s-Process Elements to the Surface