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Kepler-1647b

Coordinates: Sky map 19h 42m 36.02s, +40° 32′ 22.2″
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This is an old revision of this page, as edited by 143.232.238.131 (talk) at 23:09, 13 December 2017 (Removed references to KOI 2939.01. The period of KOI 2939.01 corresponds to the stellar binary, not the planet, which this article is about. The planet was not detected by the Kepler mission and there is no corresponding KOI .0X designation.). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

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Kepler-1647b (sometimes named Kepler-1647(AB)-b to distinguish it from the secondary component) is a circumbinary exoplanet that orbits the binary star system Kepler-1647, 3,700 light-years (1,100 pc) from Earth in the constellation Cygnus.[1] It was announced on June 13, 2016 in San Diego at a meeting of the American Astronomical Society.[1] It was detected using the transit method, when it caused the dimming of the primary star, and then again of the secondary star blended with the primary star eclipse.[2] The first transit of the planet was identified in 2012, but at the time the single event was not enough to rule out contamination, or confirm it as a planet.[2] It was discovered by the analysis of the Kepler light-curve, which showed the planet in transit.

Characteristics

Mass and orbit

The exoplanet is a gas giant, similar in size to Jupiter, and has an orbital period of 1107 days.[2] This is the longest transit period of any confirmed transiting Kepler exoplanet discovered yet.[1] It is also the largest circumbinary Kepler planet known.[2] It is 483±206 times more massive than earth, and 1.52±0.65 times Jupiter's mass.[3]

Host stars

The star system, Kepler-1647 (also known as 2MASS J19523602+4039222, KOI-2939, and KIC 5473556), is a binary star with the primary star (Kepler-1647 A) having a mass of 1.22 M☉, a radius of 1.79 R☉, and a surface temperature of 6210 ± 100 K. The secondary star (Kepler-1647 B), on the other hand, has a mass of 0.975 M☉, a radius of 1.79 R☉, and a surface temperature of 5770 K. In comparison, the Sun has a surface temperature of 5778 K.[4] The binary star system's age is estimated to be about 4.4 billion years old, about 200 million years younger than the Sun.

Habitability

Kepler-1647b is in the habitable zone of the star system.[1][2] Since the planet is a gas giant, it is unlikely to host life. However, hypothetical large moons could potentially be suitable for life.[1][2] However, large moons are usually not created during accretion near a gas giant. Such moons would likely have to be captured separately, e.g., a passing protoplanet caught into orbit due to the gravitational field of the giant planet.

See also

References

  1. ^ a b c d e "New Planet Is Largest Discovered That Orbits Two Suns". NASA. June 13, 2016. Retrieved June 14, 2016.
  2. ^ a b c d e f Kostov, Veselin B.; Orosz, Jerome A.; Welsh, William F.; Doyle, Laurance R.; Fabrycky, Daniel C.; Haghighipour, Nader; Quarles, Billy; Short, Donald R.; Cochran, William D.; Endl, Michael; Ford, Eric B.; Gregorio, Joao; Hinse, Tobias C.; Isaacson, Howard; Jenkins, Jon M.; Jensen, Eric L. N.; Kane, Stephen; Kull, Ilya; Latham, David W.; Lissauer, Jack J.; Marcy, Geoffrey W.; Mazeh, Tsevi; Muller, Tobias W. A.; Pepper, Joshua; Quinn, Samuel N.; Ragozzine, Darin; Shporer, Avi; Steffen, Jason H.; Torres, Guillermo; et al. (2015). "Kepler-1647b: the largest and longest-period Kepler transiting circumbinary planet". The Astrophysical Journal. 827: 86. arXiv:1512.00189. Bibcode:2016ApJ...827...86K. doi:10.3847/0004-637X/827/1/86. {{cite journal}}: Unknown parameter |class= ignored (help)CS1 maint: unflagged free DOI (link)
  3. ^ "Kepler-1647b – NASA Exoplanet Archive". Retrieved June 14, 2016.
  4. ^ Fraser Cain (15 September 2008). "Temperature of the Sun". Universe Today. Retrieved 19 February 2011.


External links

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