Astronomy Colloquium for 2017-11-29

Series: Astronomy Colloquium
Date: Wednesday 29-Nov-2017
Time: 16:05-17:00 (4:05-5:00 pm)
Location: ATL 2400
Speaker: Dr. Marshall Perrin (STScI)
Title: Direct Imaging of Planetary Systems: Progress and Prospects

High-contrast imaging of nearby planetary systems allows us to directly observe both their largest and smallest components: their giant Jovian planets and the tiny planetesimals that make up dusty circumstellar disks. For planets, measurements of atmospheric spectra and orbital motions are advancing our understanding of planetary demographics and atmospheric physics. For disks, we can not only place constraints on the physical properties and composition of the dust particles, we are increasingly able to investigate the dynamical interactions between disks and planets. These observations are enabled by sophisticated instrumentation that combines wavefront control, coronagraphy, integral field spectroscopy, and advanced data processing methods. I will highlight recent results from the Gemini Planet Imager and our teamís ongoing GPI Exoplanet Survey. In the next few years JWST will be a powerful facility for further characterizing such planets at longer infrared wavelengths, for a handful of worlds at relatively wide separations. Looking further ahead the WFIRST Coronagraphic Imager and future proposed missions like HabEx or LUVOIR will employ many of the same high contrast technologies as GPI but operating in space to reach unprecedented contrasts and begin the study of nearby worlds in reflected light.

Colloquia are usually preceded by espresso and ice cream at 1:45 pm outside room PSC 1150 and are followed by an informal reception at 5:15 pm in that room. Anyone interested in talking with the speaker, or being added to the colloquium announcement email list, should contact the colloquium organizer. Lunch will normally be reserved for the speaker to talk to graduate students.

Colloquium Organizer: Prof. L. Drake Deming


Special accommodations for individuals with disabilities can be made by calling (301) 405-3001. It would be appreciated if we are notified at least one week in advance.


Directions and information about parking can be found here.

This page was automatically generated on: 28-Nov-2017.