The origin of chondrules at jovian resonances
Isotopic dating indicates that chondrules were produced a few million years after the solar nebula formed. This timing is incompatible with dynamical lifetimes of small particles in the nebula and short time scales for the formation of planetesimals. Temporal and dynamical constraints can be reconciled if chondrules were produced by heating of debris from disrupted first-generation planetesimals. Jovian resonances can excite planetesimal eccentricities enough to cause collisional disruption and melting of dust by bow shocks in the nebular gas. The ages of chondrules may indicate the times of Jupiter's formation and dissipation of gas from the asteroidal region.
Weidenschilling
SJ
S. J. Weidenschilling, Planetary Science Institute, Tucson, AZ 85705, USA. F. Marzari, Dipartimento di Fisica, Universita di Padova, 35131 Padova, Italy. L. L. Hood, Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, USA.
Marzari
F
Hood
LL