doi: 10.1126/science.1166585. Epub 2008 Nov 13.
Direct imaging of multiple planets orbiting the star HR 8799
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- PMID:19008415
- DOI: 10.1126/science.1166585
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Direct imaging of multiple planets orbiting the star HR 8799
Christian Marois et al. Science..
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Abstract
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 toward imaging Earth-like planets. Imaging detections are challenging because of 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.
Comment in
- Astronomy. Exoplanets--seeing is believing.Marley MS.Marley MS.Science. 2008 Nov 28;322(5906):1335-7. doi: 10.1126/science.1167569. Epub 2008 Nov 13.Science. 2008.PMID:19008413No abstract available.
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