Timescales of the Solar Protoplanetary Disk

摘要: We summarize geochemical, astronomical, and theoretical constraints on the lifetime of protoplanetary disk. Absolute Pb-Pb-isotopic dating CAIs in CV chondrites (4567.2 ± 0.7 m.y.) chondrules (4566.7 1 m.y.), CR (4564.7 0.6 CB (4562.7 0.5 chondrites, relative Al-Mg chronology primitive suggest that high-temperature nebular processes, such as CAI chondrule formation, lasted for about 3–5 m.y. Astronomical observations disks low-mass, pre-main-sequence stars disk lifetimes are m.y.; there only few young stellar objects survive with strong dust emission gas accretion to ages 10 These generally consistent dynamical modeling solid particles disk, if rapid solids into bodies large enough resist orbital decay turbulent diffusion taken account.