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| Paper: |
Dust Production by Metal-Poor AGB Stars: the Peculiar Environments
of Globular Clusters |
| Volume: |
497, Why Galaxies Care about AGB Stars III: A Closer Look in Space and Time |
| Page: |
489 |
| Authors: |
McDonald, I. |
| Abstract: |
Giant stars replenish the interstellar media (ISM) of globular clusters,
but few such ISM are seen. We propose ISM are ejected by white dwarfs,
which can ionise them very efficiently, and that ISM thermally expand
to overflow the clusters' tidal boundaries. Clusters are cleared on a
dynamical timescale of a few Myr. This process can potentially account
for both the maximum mass of a globular cluster
(∼107 M☉) and the peculiar elemental enrichments seen
in them. Dust and molecules produced in all kinds of clusters should
be ionised and not escape into the ISM of host galaxies. |
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