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OGLE-2016-BLG-1190Lb

Coordinates: Sky map 17h 58m 53.0s, −27° 36′ 49″
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OGLE-2016-BLG-1190Lb
Discovery
Discovered byRyu, Y.-H. et al[1]
Discovery siteSpitzer Space Telescope[1]
Discovery date2017[1]
Gravitational microlensing[1]
Orbital characteristics
2.17 AU (325,000,000 km)[2]
Eccentricity0.42[2]
1223.6 [2] d
Inclination41.2[2]
StarOGLE-2016-BLG-1190L[1]
Physical characteristics
Mass13.38[1][2] MJ

OGLE-2016-BLG-1190Lb is an extremely massive exoplanet, with a mass about 13.4 times that of Jupiter (MJ), or is, possibly, a low mass brown dwarf, orbiting the G-dwarf star OGLE-2016-BLG-1190L, located about 22,000 light years from Earth, in the constellation of Sagittarius, in the galactic bulge of the Milky Way.[1][3][4]

“Since the existence of the brown dwarf desert is the signature of different formation mechanisms for stars and planets, the extremely close proximity of OGLE-2016-BLG-1190Lb to this desert raises the question of whether it is truly a ‘planet’ (by formation mechanism) and therefore reacts back upon its role tracing the galactic distribution of planets," according to astronomers reporting the findings.[1][5]

Discovery

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The host star was discovered in June 2016 by the Optical Gravitational Lensing Experiment (OGLE) collaboration; the Spitzer Space Telescope observed the microlensing event a few days after its discovery. OGLE-2016-BLG-1190Lb is the first exoplanet discovered by microlensing with the Spitzer space telescope and the first exoplanet discovered lying near the planet/brown dwarf boundary.[1][3] In addition, the discovery "is likely to be the first Spitzer microlensing planet in the Galactic bulge/bar," according to the initial reported study.[1]

See also

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References

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  1. ^ a b c d e f g h i j Ryu, Y.-H.; et al. (27 October 2017). "OGLE-2016-BLG-1190Lb: The FirstSpitzer Bulge Planet Lies Near the Planet/Brown-dwarf Boundary". The Astronomical Journal. 155: 40. arXiv:1710.09974. doi:10.3847/1538-3881/aa9be4. S2CID 54706921.
  2. ^ a b c d e Staff (2017). "Planet OGLE-2016-BLG-1190L b". Extrasolar Planets Encyclopaedia. Retrieved 10 November 2017.
  3. ^ a b Nowakowski, Tomasz (6 November 2017). "Extremely massive exoplanet discovered in the Milky Way's bulge". Phys.org. Retrieved 10 November 2017.
  4. ^ Bartels, Meghan (7 November 2017). "A Giant Exoplanet Is Hiding At The Center of the Milky Way Galaxy". Newsweek. Retrieved 10 November 2017.
  5. ^ Wehner, Mike (7 November 2017). "Astronomers just spotted a planet so huge they aren't even sure it's really a planet". BGR. Retrieved 10 November 2017.
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