Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009noao.prop..209s&link_type=abstract
NOAO Proposal ID #2009B-0209
Astronomy and Astrophysics
Astronomy
Scientific paper
In 2008, three orbiting planets were discovered and confirmed around HR8799 marking it as the first imaged extra solar planetary system with multiple planets. There are many similarities between HR8799 and our Solar System. IRAS and ISO detected a Kuiper belt around this star based on far infrared dust excess and Spitzer IRS spectroscopy revealed a separate population of warmer dust grains that are different from colder dust grains farther outside. These warm grains must have been created in-situ from a local asteroidal belt because a simple calculation of dust grain dynamics predicts an extremely small chance for dust grains migrating inward from the outer colder disk through the orbits of three massive gas giant planets. 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 Gemini Michelle.
Barman Travis
Doyon Rene
Lafrenier David
Macintosh Bruce
Marois Christian
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