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- W2897788772 abstract "Terrestrial planets and the cores of giant planets are thought to be built by the collisional agglomeration of solids spanning over 20 orders of magnitude in size within a few million years. However, there is tension between this basic picture of planet formation and standard theoretical assumptions associated with the migration of pebbles ($sim$mm/cm-sized particles) in gas-rich disks and the presumably much longer timescales necessary to assemble ($sim$km-scale) planetesimals. To confront these potential theoretical discrepancies with observational constraints, the ideal tracer of the solids concentrated in protoplanetary disk substructures is the 30-100 GHz continuum, which strikes the best balance in sensitivity (emission still bright), optical depth (low enough to reliably estimate densities), and angular resolution (high enough to resolve fine-scale features at disk radii as small as 1 au). With its combination of sensitivity, frequency coverage, and angular resolution, the next-generation VLA will be the only facility that has the capabilities to open up this new window into the physics of planetesimal formation." @default.
- W2897788772 created "2018-10-26" @default.
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- W2897788772 date "2018-10-15" @default.
- W2897788772 modified "2023-09-27" @default.
- W2897788772 title "Science with an ngVLA: Resolved Substructures in Protoplanetary Disks" @default.
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