Direct Imaging of Multiple Planets Orbiting the Star HR 8799
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- Teacher spread
- 0.212 · how far apart the two teachers sit on this one work
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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.
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The record
- Venue
- Science
- Topic
- Stellar, planetary, and galactic studies
- Field
- Physics and Astronomy
- Canadian institutions
- Université de MontréalNational Research Council CanadaHerzberg Institute of Astrophysics
- Funders
- Science and Technology Facilities Council
- Keywords
- PlanetPhysicsDirect imagingAstronomyJupiter (rocket family)Planetary systemLuminosityOrbit (dynamics)Gas giantSolar SystemAstrophysicsExoplanetSpace explorationOpticsAerospace engineering
- Has abstract in OpenAlex
- yes