March 12, 2019

Speaker: Brendan Bowler

Contact Information: bpbowler@astro.as.texas.edu

Title: The Origin and Demographics of Long-Period Giant Planets

Abstract: Observations of exoplanets over the past quarter century have shown that the demographics and architectures of planetary systems display a remarkable diversity spanning over four orders of magnitude in mass, separation, and age. Direct imaging has opened up much of this landscape, enabling a powerful probe of the orbits, atmospheres, and origin of long-period giant planets. Large dedicated surveys in particular are constraining the frequency and mass-period distribution functions of this population with progressively improved precision, providing a window into the efficiency of planet formation and migration at large orbital distances. In this talk I will review recent progress aimed at understanding the occurrence rate, circumplanetary disks, dynamical masses, angular momentum architecture, and subtler statistical properties of directly imaged exoplanets. Together these results are beginning to clarify the dominant formation pathway of these companions and their relationship to planets at smaller separations.

Visit Schedule:

Tuesday (12 Mar 2019):

• 10:30 a.m.: Coffee / Talk Prep

• 11:00 a.m.: Colloquium

• 12:15 p.m.: Bahcall Lunch

• 2:00 p.m.: Neta Bahcall (Peyton 137)

• 2:30 p.m.: Renyue Cen (111 Peyton)

• 3:00 p.m.: Talks by Boris Leistedt (PCTS, 407 Jadwin)

• 4:00 p.m.: (Tea with grad students? moved from 3:30)

• 4:30 p.m.: Luke Bouma (Peyton 023A)

• 5:00 p.m.:

• 5:30 p.m.: Dan Tamayo (Peyton 110)

• 6:00 p.m.: DINNER WITH HOST - meet in Grand Central

Dinner Sign-up (students have priority; 8 MAX) - add your name here:

1. Speaker

2. Faculty host: Neta Bahcall

3. Postdoc host: Evan Schneider

4. Erin F

5. Sam Yee

6. Luke Bouma

7. Dan Tamayo

8. Brianna Lacy

NO MORE THAN 8 PEOPLE (otherwise it is very difficult to properly interact with the speaker)