Multiple Planets Orbiting the Star HR 8799

Details Multiple Planets Orbiting the Star HR 8799 Multiple Planets Orbiting the Star HR 8799

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21423003m&link_type=abstract

American Astronomical Society, AAS Meeting #214, #230.03; Bulletin of the American Astronomical Society, Vol. 41, p.734

Astronomy and Astrophysics

Astronomy

Scientific paper

Direct imaging of exoplanetary systems is a powerful technique that can reveal Jupiter-like planets in wide orbits, can enable detailed characterization of planetary atmospheres, and is a key step towards imaging Earth-like planets. Imaging detections are challenging due to the combined effect of small angular separation and large luminosity contrast between a planet and its host star.
High-contrast observations with the Keck and Gemini telescopes have revealed three planets orbiting the star HR 8799, with projected separations of 24, 38, and 68 astronomical units. Multi-epoch data show counter-clockwise orbital motion for all three imaged planets. The low luminosity of the companions and the estimated age of the system imply planetary masses between 5 and 13 times that of Jupiter. This system resembles a scaled-up version of the outer portion of our Solar System.

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