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Astrophysics Luncheon Seminar

Debris Disk Results from the Gemini Planet Imager Exoplanet Survey: Resolving Dusty Disks on Solar System Scales with Polarimetry
Presented by Tom Esposito
University of California, Berkeley

Monday, April 8, 2019
12:00 noon in 169-336

Abstract
I will present discoveries and results from our ~4-year circumstellar debris disk imaging campaign within the Gemini Planet Imager Exoplanet Survey (GPIES). Between November 2014 and January 2019, GPIES surveyed over 500 young nearby stars to directly image giant planets in near-IR light with the extreme-AO, high-contrast GPI instrument on the Gemini South telescope. The simultaneous disk campaign is itself a large, uniform survey that spatially resolved 28 circumstellar disks using both polarimetric and spectroscopic observations of a 104 star GPIES subsample. For the first time for many of these planetary systems we are probing the ~10-200 AU range with spatial resolutions of a few AU, regions fundamental to planet formation. I will present the GPIES disk images showing multiple morphologies and extents, including several which represent the first scattered-light and/or polarized intensity detections. I will also discuss the bulk properties of our debris disk sample (e.g., radii and inclinations) and implications of our observational sensitivity to scattered-light disks for future imaging missions. This work benefited from NASA's NExSS (NNX15AD95G) research coordination network sponsored by NASA's Science Mission Directorate.

JPL Contact: Max Millar-Blanchaer


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