Date

Speaker

Title

Aug 29

Neal Evans

University of Texas at Austin

Organizational meeting.

Sep 5

Samuel N. Quinn

Georgia State University

(host: Adam Kraus) "Hot Jupiters in Open Clusters and Binaries: Observational Constraints on Giant Planet Migration"

The first hot Jupiter was discovered nearly 20 years ago, and while it is now accepted that such planets must form beyond the ice line and migrate inward, we do not yet know which mechanism(s) are most important to this process. Young hot Jupiters, such as those that might be found in many open clusters, must have experienced migration recently, and their resulting orbital properties may still bear unique imprints of the process by which they migrated. In particular, Type II migration is expected to preserve coplanar circular orbits, while planet-planet scattering or Kozai cycles should produce initially inclined and eccentric orbits (though further dynamical evolution such as tidal circularization may erase some of this evidence in older systems). While the latter two mechanisms produce qualitatively similar orbits, they differ in that Kozai requires a stellar companion, so identifying the population of hot Jupiters residing in binary systems will be important for further distinction between mechanisms. Here, I will discuss results from two projects with the potential to constrain the relative importance of proposed giant planet migration mechanisms -- a radial-velocity search for planets in open clusters and an adaptive optics imaging search for stellar companions to known hot Jupiter hosts.

close

Sep 12

No regular ISM Seminar held today, to avoid conflict with the Quasars Symposium.

Sep 19

Speaker: TBD

Affiliation: TBA

Undergraduate Research Seminar.

Sep 26

Trent Dupuy

University of Texas at Austin

"A Stormy Forecast for the Evolution of Brown Dwarfs"

Oct 3

Yao-Lun Yang

University of Texas at Austin

"From Filaments to Class 0 Protostars"

Oct 10

IGRINS Minions: Hwihyun Kim & Kyle Kaplan

University of Texas at Austin

"Current Status of IGRINS and Preliminary Results from the First Science Run"

Oct 17

No talk scheduled, to avoid conflict with the Astronomy Faculty Meeting.

Oct 24

No talk scheduled. Dr. John Scalo's talk is postponed to 5 December.

Oct 31

Neal Evans

University of Texas at Austin

"Identifying the Legitimate Protostars"

Nov 7

Kevin Gullikson

University of Texas at Austin

"Hot Stars with Cool Companions"

Nov 14
2 PM

Daniel Foreman-Mackey

New York University

(Host: Mike Endl) "Inferring the Population of Exoplanets from Noisy, Incomplete Catalogs"

abstract

Nov 21

1) Andrew Riddle
2) Michael Gully-Santiago

University of Texas at Austin

1) "Eclipsing Binary Masses from Archival Keck Data"
2) "Discovery and Characterization of Young Stellar Objects in Nearby Star-forming Regions"

Nov 28

Day after Thanksgiving Day: Staff Holiday. No classes being held.

Dec 5

John Scalo

University of Texas at Austin

"Breaking the Meter Barrier for Early Growth of Planetesimals in Disks"