Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 721, Issue 2, Pages L199-L202Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/721/2/L199
Keywords
circumstellar matter; infrared: stars; planetary systems; stars: individual ( HR 8799)
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Funding
- Spanish MICINN [RYC-2007-00612, AYA2009-07304, 2010CSD2009-00038]
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We consider the limiting case for orbital stability of the companions to HR 8799. This case is only consistent with ages for the system of similar to 100 Myr, not with the 1 Gyr age proposed from asteroseismology. The discrepancy probably arises because the inclination of the star is smaller than assumed in analyzing the asteroseismology data. Given this young age, the best estimates of the companion masses place them by a small margin on the planet side of the division between planets and brown dwarfs.
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