HD 74156 d
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HD 74156 d is a proposed exoplanet with minimum mass 40% the mass of Jupiter. If the orbital inclination is not wholly face-on to Earth, then it would be a gas giant. It orbits about the same distance as Earth to the Sun, too hot for the system's habitable zone. It was first observed by Jacob Bean and his team at the University of Texas.
The existence of HD 74156 d was predicted by computer models created by Rory Barnes, Thomas Quinn and Sean Raymond, operating under the theory that planetary systems would have planets occupying every stable orbital zone. The two previously discovered planets of this system left a stable gap between them where HD 74156 d was ultimately claimed detected. If this holds out, it is the first extrasolar planet whose existence was predicted by theory before it was detected experimentally.[1]
Roman V. Baluev cast doubt on this discovery due to errors in the data.[2] The initial discoverers have not yet addressed Baluev's concern.[3]
See also
References
- ^ Centauri Dreams » Blog Archive » Exoplanet Prediction Confirmed
- ^ Roman V. Baluev (2008). "Accounting for velocity jitters in planet search surveys". arXiv:0712.3862v2 [astro-ph].
- ^ Rory Barnes, Krzysztof Gozdziewski, Sean N. Raymond (2008). "The Successful Prediction of the Extrasolar Planet HD 74156 d". arXiv:0804.4496v1 [astro-ph].
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- Jacob L. Bean, Barbara E. McArthur, G. Fritz Benedict, Amber Armstrong (2007). "Detection of a Third Planet in the HD 74156 System Using the Hobby-Eberly Telescope" (abstract). Astronomy and Astrophysics.
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External links
- "HD 74156 d". The Extrasolar Planets Encyclopedia.
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