NOAO >   Observing Info >   Approved Programs >   2010B-0242

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Proposal Information for 2010B-0242


PI: Inseok Song, University of Georgia, song@uga.edu
Address: Department of Physics and Astronomy, Athens, GA, 30602, USA

CoI: Jennifer Patience, University of Exeter
CoI: Adam Schneider, University of Georgia

Title: Resolving the Asteroid Belt of HR 8799

Abstract: In 2008, three orbiting planets were discovered and confirmed around HR8799 marking it as the first imaged extra solar planetary system with multiple planets. IRAS and ISO detected a cold dusty disk, an analogy to our Kuiper Belt, around this star based on far infrared dust excess. Spitzer IRS spectroscopy revealed a separate population of warmer dust grains that are different from colder dust grains. Warm dust grains must have been created in-situ from a local asteroidal belt because a detailed calculation of dust grain dynamics predicts an extremely small chance for dust grains migrating inward from the outer colder disk. Therefore, HR8799 must have an asteroid belt inside of the innermost detected planet. The expected angular extent of the astroid belt is 0.17-0.50 arcsec radius and such a warm dust disk can be readily imaged with the diffraction limited imaging at Gemini. This proposal was accepted as Band2 in 2009B, however, because of the Gemini North scheduling issue, no useful data was obtained. Therefore, we are resubmitting the proposal for Gemini/T-ReCS.


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