Dust, and old stars

[Nereid]

Assume a gravitationally bound collection of stars, a galaxy or globular cluster say.

Assume the stars are all old, none younger than 5 billion years, say.

Assume a quite low average metallicity.

How much dust would you expect there to be, still bound to the galaxy/GC?

Specifically, are there any mechanisms which would deplete the object of a substantial proportion of its dust, as of the time of last star formation?

Related question: where did all the dust that the Pop II stars which dominate ellipticals produced go?

[StupendousMan]

Assume a gravitationally bound collection of stars, a galaxy or globular cluster say.

Assume the stars are all old, none younger than 5 billion years, say.

Assume a quite low average metallicity.

How much dust would you expect there to be, still bound to the galaxy/GC?

Specifically, are there any mechanisms which would deplete the object of a substantial proportion of its dust, as of the time of last star formation?

Related question: where did all the dust that the Pop II stars which dominate ellipticals produced go?

There is substantial radiation pressure on dust due to hot young stars early in the life of a cluster. A group of hot young stars can create enough radiation pressure to push the dust in a cluster out of its gravitational potential well. The hot young stars can also destroy dust grains.

This is a well-studied problem. Go to ADS and do a little searching via the "Abstract words" box.