An Accretion Rim Constraint on Chondrule Formation Theories

Abstract

We argue that properties of the fine-grained rims, presumably accreted by chondrules during transport subsequent to their formation, may help differentiate between chondrule production mechanisms which are “local” (at the parent body formation site) and “distant” (e.g., close to the protosun, in accretion shocks, or outside the Solar Nebula). Systematics in the thicknesses of these rims seem most compatible with local production scenarios in which chondrules deplete the dust in a confined volume prior to parent body formation.