... and younger clusters formed later from gas and dust clouds of ever decreasing mass ... This time lag enabled the gas and dust clouds to become appreciably enriched in ... there was a rapid collapse of the gas?dust medium toward the Galactic plane with ...
... stars in the "low-metallicity tail" of the disk (if there are any) probably formed from low-metallicity gas and dust fragments weakly interacting with the bulk of the parent proto-disk cloud, where star formation (and hence enrichment in heavy elements ...
... In future papers, we will investigate the role of non-isothermality (using detailed cooling rates due to gas and dust), rotation, magnetic fields, and non-axisymmetry in determining M and implied observable quantities. ...