History of the Solar Nebula from Meteorite Paleomagnetism.

摘要: We review recent advances in our understanding of magnetism the solar nebular and protoplanetary disks (PPDs). discuss implications theory, meteorite measurements, astronomical observations for planetary formation evolution. Paleomagnetic measurements indicate presence fields 0.54$\pm$0.21 G at $\sim$1 to 3 units (AU) from Sun $\gtrsim$0.06 7 AU until >1.22 >2.51 million years (Ma) after system formation, respectively. These intensities are consistent with those predicted enable typical astronomically-observed protostellar accretion rates $\sim$10$^{-8}$ M$_\odot$ yr$^{-1}$, suggesting that played a central role mass angular momentum transport PPDs. studies also <0.006 <0.003 inner outer by 3.94 4.89 Ma, respectively, gas having dispersed this time. This is similar observed lifetimes extrasolar disks.