OGLE-2016-BLG-1190Lb

OGLE-2016-BLG-1190Lb
Discovery
Discovered by	Ryu, Y.-H. et al
Discovery site	Spitzer Space Telescope
Discovery date	2017
Detection method	Gravitational microlensing
Orbital characteristics
Semi-major axis	2.17 AU (325,000,000 km)
Eccentricity	0.42
Orbital period (sidereal)	1223.6 d
Inclination	41.2
Star	OGLE-2016-BLG-1190L
Physical characteristics
Mass	13.38 MJ

OGLE-2016-BLG-1190Lb is an extremely massive exoplanet, with a mass about 13.4 times that of Jupiter (M_J), 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

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]

References

^ ^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.
^ ^a ^b ^c ^d ^e Staff (2017). "Planet OGLE-2016-BLG-1190L b". Extrasolar Planets Encyclopaedia. Retrieved 10 November 2017.
^ ^a ^b Nowakowski, Tomasz (6 November 2017). "Extremely massive exoplanet discovered in the Milky Way's bulge". Phys.org. Retrieved 10 November 2017.
^ Bartels, Meghan (7 November 2017). "A Giant Exoplanet Is Hiding At The Center of the Milky Way Galaxy". Newsweek. Retrieved 10 November 2017.
^ 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.

External links

[ARX-20171027-1] ^ ^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.

[EXP-2017-2] Staff (2017). "Planet OGLE-2016-BLG-1190L b". Extrasolar Planets Encyclopaedia. Retrieved 10 November 2017.

[PHYS-20171106-3] Nowakowski, Tomasz (6 November 2017). "Extremely massive exoplanet discovered in the Milky Way's bulge". Phys.org. Retrieved 10 November 2017.

[NWSWK-20171107-4] Bartels, Meghan (7 November 2017). "A Giant Exoplanet Is Hiding At The Center of the Milky Way Galaxy". Newsweek. Retrieved 10 November 2017.

[BGR-20171107-5] 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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OGLE-2016-BLG-1190Lb

Discovery

See also

References

External links

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