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Astronomy Colloquium - "Starting Early: Embedded Disks Jump-start Planet Formation"

Event Type
Seminar/Symposium
Sponsor
Department of Astronomy
Virtual
wifi event
Date
Mar 2, 2021   3:45 pm  
Speaker
Dr. Dom Segura-Cox, MPE
Contact
Rebecca Bare
E-Mail
rsbare@illinois.edu
Phone
217-265-8226
Views
4
Originating Calendar
Astronomy Colloquium Speaker Calendar

Rings in protoplanetary disks are the sites of planet formation, and ringed disks around Class II pre-main-sequence stars have been found in abundance in recent years with high-resolution ALMA observations.  Now, even younger ringed disks around Class I protostars, which are still embedded in dense envelopes, are starting to be discovered. I will present ALMA observations of a Class I protostar which has a ringed dust disk as well as a larger-scale infalling streamer of gas 1500 au in length connecting the envelope to the disk. The dust rings are the least-evolved example of rings in a protostellar disk known to date, indicating that stable zones of grain growth---required for the first steps of planet formation---are already in place during the early embedded phase of star formation. Further, these first steps of planet formation occur while the envelope continues to accrete onto the disk via the gas streamer, indicating that accretion from the envelope likely influences the initial conditions for planet formation.

 

Topic: Astronomy Colloquium (SP2021)
Time: This is a recurring meeting Meet anytime

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