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KELT-4Ab is an extrasolar planet that orbits the star KELT-4A, in the star system KELT-4. The planet is approximately 760 ly (230 pc) away in the constellation of Leo. The planet was discovered by the Kilodegree Extremely Little Telescope (KELT).

Characteristics

The exoplanet was discovered by transit and is a Hot Jupiter planet orbiting a star in a triple star system, KELT-4. It is the fourth planet found in such a system. As KELT-4A is the brightest host (V~10) of a Hot Jupiter in a hierarchical triple stellar system found so far researchers expect it may be useful in learning more about inflated planets.

Star system

KELT-4 is a triple star system. KELT-4BC is a binary star system subcomponent of the triple, 328 ± 16 AU (4.91×10 ± 2.4×10 km; 3.05×10 ± 1.5×10 mi) away from KELT-4A and the projected separation between KELT-4B and KELT-4C is 10.30 ± 0.74 AU (1.541×10 ± 111,000,000 km; 957,000,000 ± 69,000,000 mi).

See also

• Gliese 667 Cc, a planet in a triple star system
• KELT-2Ab, a previous planet discovered by the KELT survey, in a binary system
• KELT

References

1. ^ Eastman, Jason D.; et al. (2016). "KELT-4Ab: An Inflated Hot Jupiter Transiting The Bright (V ~ 10) Component Of A Hiearchical Triple". The Astrophysical Journal. 151 (2): 45. arXiv:1510.00015. Bibcode:2016AJ....151...45E. doi:10.3847/0004-6256/151/2/45. S2CID 17613522.
2. ^ "Planet KELT-4A b". Extrasolar Planets Encyclopaedia. Archived from the original on 2016-04-16. Retrieved 2016-04-02.
3. Brown, A. G. A; et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy and Astrophysics. 595. A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512. S2CID 1828208.Gaia Data Release 1 catalog entry
4. "Planet KELT-4A b". Open Exoplanet Catalogue. Retrieved 2016-04-02.
5. Bob Yirka (1 April 2016). "Planet with triple-star system found". Phys.org. Retrieved 3 April 2016.
6. Nola Taylor Redd (31 March 2016). "New Alien Planet Boasts Rare Triple Suns". Scientific American. Retrieved 2 April 2016.

External links

• KELT-North survey website Archived 2019-01-24 at the Wayback Machine
• Open Exoplanet Catalogue Entry

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