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Center for Astrophysics Research and Technologies Seminar Series Information


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Direct Imaging Surveys for Planets and Disks

Friday February 9, 2018
3:30 pm

 Presenter:  Jennifer Patience, Arizona State University
 Series:  Physics and Astronomy Colloquium
 Abstract:  The Gemini Planet Imager (GPI) is a next-generation adaptive optics equipped coronagraphic integral field unit with the sensitivity and resolution to detect planetary companions with separations of 0”.2 to 1”.0 around a large set of stars. An 890-hour GPI survey of 600 young, nearby stars with spectral types ranging from A-stars to K-stars commenced in late-2014, and over 300 stars have been observed thus far in the infrared . The central aims of the program are: (1) the discovery of a population of giant planets with orbital radii of 5-50 AU comparable to Solar System gas giant orbits, (2) the characterization of the atmospheric properties of young planetary companions, and (3) spatially resolved imaging of debris disks. Results from GPI exoplanet observations include the discoveries of new cool companions including a planet and brown dwarf, and a number of spatially resolved debris disks exhibiting a range of structures. An overview of the survey scope, detection limits, and current results from the Gemini Planet Imager Exoplanet Survey will be presented. To investigate the origins of planetary systems, ALMA observations of younger objects too faint for GPI are being used to study the dust and gas disks of low mass stars and brown dwarfs. Initial ALMA results from the lowest mass members of the Taurus star-forming region will be presented.

 Host:  Ylva Pihlström
 Location:  Room 125, Dane Smith Hall

Refreshments will be available before the colloquium, at 03:15 pm, in in the lobby of Dane Smith Hall.

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