Gas Disk Sizes from CO Line Observations: A Test of Angular Momentum Evolution
Feng Long,
Sean M. Andrews,
Giovanni Rosotti
et al.
Abstract:The size of a disk encodes important information about its evolution. Combining new Submillimeter Array (SMA) observations with archival Atacama Large Millimeter Array (ALMA) data, we analyze mm continuum and CO emission line sizes for a sample of 44 protoplanetary disks around stars with masses of 0.15-2 M in several nearby star-forming regions. Sizes measured from 12 CO line emission span from 50 to 1000 au. This range could be explained by viscous evolution models with different α values (mostly of 10 −4 − … Show more
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