Abstract: Stars are formed surrounded by disks. The mass in the disk decreases with time as it is accreted onto the star and onto the planets forming in the disk. In turn, these planets sculpt the disk, creating structures that regulate the flow of matter. The interconnection between all these elements determine how the disk and its planets evolve. The mass accretion rate onto the star is one observable that gives us key information about disk evolution. I will describe methods to determine mass accretion rates and observational programs to obtain them, including our ongoing search for the lowest accretors. I will show our determinations for the mass accretion rates onto the star and onto the planets in the disk with the clearest evidence of harboring protoplanets, PDS70, and discuss implications for the disk structure, including the tantalizing possibility of a hidden mass reservoir in the innermost disk.
Yale Astronomy & Astrophysics Colloquium - Nuria Calvet
Thursday, March 26, 2020 - 2:30pm
Nuria Calvet, Helen Dodson Prince Collegiate Professor of Astronomy
University of Michigan, Department of Astronomy
What accretion can tell us about protoplanetary disks
Watson Center A-51
60 Sachem StreetNew Haven, CT 06511