Chondrule transport in protoplanetary discs
Résumé
Chondrule formation remains one of the most elusive early Solar system events. Here, we take
the novel approach of employing numerical simulations to investigate chondrule origin beyond
purely cosmochemical methods. We model the transport of generically produced chondrules
and dust in a 1D viscous protoplanetary disc model in order to constrain the chondrule
formation events. For a single formation event we are able to match analytical predictions of
the memory they retain of each other (complementarity), finding that a large mass accretion
rate (10−7 M yr−1) allows for delays on the order of the disc’s viscous time-scale between
chondrule formation and chondrite accretion. Further, we find older discs to be severely
diminished of chondrules, with accretion rates 10−9 M yr−1 for nominal parameters. We
then characterize the distribution of chondrule origins in both space and time, as functions of
disc parameters and chondrule formation rates, in runs with continuous chondrule formation
and both static and evolving discs. Our data suggest that these can account for the observed
diversity between distinct chondrite classes, if some diversity in accretion time is allowed for