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Extrasolar Visions II

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 HR 8799 astrometry

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Lazarus
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Number of posts : 3337
Registration date : 2008-06-12

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PostSubject: HR 8799 astrometry   HR 8799 astrometry Empty28th February 2011, 4:54 pm
VLT/NACO astrometry of the HR8799 planetary system. L'-band observations of the three outer planets

Apparently the best-fit face-on orbit of HR 8799d is too eccentric to be stable. Seems that it may not be coplanar with the outer two planets and debris disk.
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Sirius_Alpha
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PostSubject: Re: HR 8799 astrometry   HR 8799 astrometry Empty4th March 2011, 8:07 pm
Interestingy, the inclination constraints assuming a circular orbit for d seem to be consistent with the asteroseismically derived inclination axis of the star.

What is going on?

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