The central stars
The central stars
The central stars
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AGB <strong>stars</strong> are dynamical objects<strong>The</strong> angular resolution of ALMA fits well theimportant time scales of AGB <strong>stars</strong>:θ t ≈ v etD ≈ 0.3 [t100 yr] [ 1 kpcD]arcs- stellar pulsation 1 yrο Ceti visual lightcurve- super-period effects 5 yr- clump ejection 1 yr- gas-dust interaction < 100 yr- thermal pulsing 10 2-3 yr and 10 4-5 yr- termination of AGB < 100 yr