Resolving the Asteroid Belt of HR 8799

Details Resolving the Asteroid Belt of HR 8799 Resolving the Asteroid Belt of HR 8799

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.

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