Colloquia Schedule

Kate Follette, Amherst College
Thursday, February 23, 2017
3:45 p.m.
LGRT 1033
Title:
High-Contrast Imaging of Extrasolar Planets and Circumstellar Disks
Abstract:
Of the thousands of known extrasolar planets, why are the dozen or so directly imaged exoplanets among the most important despite their apparently anomalous properties within the general exoplanet population (>10AU, >2MJ)? What are the prospects for (and recent successes in) detecting younger, lower mass and/or closer-in planets via direct imaging? I will discuss the current state of the art in the field of high contrast imaging of extrasolar planets and circumstellar disks, with a particular emphasis on a subset of objects that host both disks and (likely) planets - the so-called “transitional disks”. These young circumstellar disks are almost certainly actively undergoing planet formation, and yet the presence of disk material complicates our ability to isolate light from planets and/or protoplanets embedded within them. I will discuss my recent experiences “killing” one exoplanet candidate lying at/inside a transitional disk gap, and confirming another.
Christina Williams, University of Arizona
Thursday, March 2, 2017
3:45 p.m.
LGRT 1033
Title:
The nature of compact quenched galaxies: new perspectives from current surveys, and future science with JWST
Abstract:
The cessation of star-formation in galaxies remains a poorly understood process, despite being one of the most influential events in the evolution of galaxies. It is now known that high stellar density, or compactness, is strongly associated with this process, although the nature of this association is also poorly understood. I will review recent progress on understanding compact and quenched galaxies at high-redshift, and present new results that help constrain the reason for the association between compactness and quenching. Understanding the early evolutionary development of these first quenched galaxies is a major science goal of the James Webb Space Telescope, and I will discuss how future surveys with this facility will resolve outstanding questions about the nature of quenched galaxies. Finally, I will describe the plans for the Guaranteed Time Observations with this new groundbreaking facility.
Mark Gurwell, CfA
Thursday, March 9, 2017
3:45 p.m.
LGRT 1033
Title:
TBA
Abstract:
TBA
Anna Frebel, MIT
Thursday, March 23, 2017
3:45 p.m.
LGRT 1033
Title:
TBA
Abstract:
TBA
Ilse Cleeves, CfA
Thursday, March 30, 2017
3:45 p.m.
LGRT 1033
Title:
TBA
Abstract:
TBA
Nia Imara, CfA
Thursday, April 6, 2017
3:45 p.m.
LGRT 1033
Title:
TBA
Abstract:
TBA
Liz McGrath, Colby College
Thursday, April 13, 2017
3:45 p.m.
LGRT 1033
Title:
TBA
Abstract:
TBA
Matthew Hayes, Stockholm University
Thursday, April 20, 2017
3:45 p.m.
LGRT 1033
Title:
TBA
Abstract:
TBA
Aaron Lee, UMass Amherst
Thursday, April 27, 2017
3:45 p.m.
LGRT 1033
Title:
TBA
Abstract:
TBA
Alberto Bolatto
Thursday, May 4, 2017
3:45 p.m.
LGRT 1033
Title:
TBA
Abstract:
TBA