Dec 16, 2013

Science Lunch Talk: Ruobing Dong "Examining the Earliest Stage of Planet Formation through Disk-Planet Interactions in Protoplanetary Disks"

Title: Examining the Earliest Stage of Planet Formation 
through Disk-Planet Interactions in Protoplanetary Disks

Abstract: Signposts of planets in protoplanetary disks produced by disk-planet 
interactions may provide us a unique way to probe and study the earliest stages 
of planet formation. In the first part of the talk, I will introduce the concept 
of disk-planet interactions, then present some numerical simulations of them 
in protoplanetary disks. Particularly, I will show gap opening in low viscosity 
disks by low mass planets due to the damping of the waves caused by the wave 
nonlinearity. In the second part, I will move on to observations of transitional 
disks, which are protoplanetary disks with central depleted regions (cavities), 
possibly cleared out by the forming planets. Recently, Subaru directly imaged 
a number of such disks at near infrared (NIR) wavelengths (the SEEDS project) 
with high spatial resolution and small inner working angles. Using radiative 
transfer simulations, we study the structure of these objects by modeling 
observations at different bands simultaneously. The complexity of transitional 
disks is reviewed by the variety of features captured in their observations, 
such as cavities, spiral arms, and other non-smooth/asymmetric structures in 
the disks, which indicate different underlying disk structure, possibly implying 
different origins of these objects.

Event Details

Date:
Dec 16, 2013

Time:
12–1pm

Location:

UW-Madison Astronomy Home