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Star (white),
atmospheric shocks (orange),
forsterite dust clouds (red) (
mp4
)
Large-scale
convection
cells
drive the dynamics.
Convection excites pulsations,
that cause
shocks
.
Shocks lift up the gas and
cause
density inhomogeneities
.
Dust forms in
clumps
.
Dust clouds
have complex shapes.
Part of the atmospherical material forms dust.
Part of the dust leaves the star.
Favorable conditions: dust forms
periodically
in every pulsation cycle.
Difficult conditions: dust forms
intermittently
.