User:Astronomical Editor/OGLE-2015-BLG-1319

OGLE-2015-BLG-1319
	Artist’s impression of OGLE-2015-BLG-1319
Discovery
Discovered by	Spitzer Space Telescope, Swift, Optical Gravitational Lensing Experiment
Discovery date	June/July, 2015
Detection method	Microlensing
Orbital characteristics
Semi-major axis	3 AU
Star	OGLE-2015-BLG-1319L

OGLE-2015-BLG-1319 is a brown dwarf that orbits a K-type star at the close distance of 3 AU, located 16307 light years away from the Solar System.

Discovery

It was discovered during June–July 2015 using the gravitational microlensing detection method through the joint effort between Swift, Spitzer Space Telescope, and the ground-based Optical Gravitational Lensing Experiment, the first time two space telescopes have observed the same microlensing event. This method was possible because of the large separation between the two spacecraft: Swift is in low Earth orbit while Spitzer is more than one AU distant in an Earth-trailing heliocentric orbit. This separation provided significantly different perspectives of the brown dwarf, allowing for constraints to be placed on some of the object's physical characteristics.^[1]^[2]

Orbit

OGLE-2015-BLG-1319 sits unusually close to its host star. Orbiting at just 3 AU, it sits within the brown dwarf desert, with only around 1% of all Sun like stars having them in such an orbit, which might imply that the brown dwarf might have formed further from the star, then settling a former protoplanetary disk in the later in the formation of the system.

Host star

The host star, OGLE-2015-BLG-1319L, is a K-type star. With an apparent magnitude of 22.0, it is only visible though strong telescopes, and is only 0.58 M☉ ^[3]

References

↑ "NASA Space Telescopes Pinpoint Elusive Brown Dwarf". NASA. November 10, 2016. Retrieved December 18, 2016. This article incorporates text from this source, which is in the public domain.
↑ "Brown Dwarf Microlensing Program". NASA. November 10, 2016. Retrieved December 18, 2016. This article incorporates text from this source, which is in the public domain.
↑ "Exoplanet Kyoto–OGLE-2015-BLG-1319L". November 10, 2016. Retrieved December 18, 2016. This article incorporates text from this source, which is in the public domain.

External links

[nasa201611101-1] "NASA Space Telescopes Pinpoint Elusive Brown Dwarf". NASA. November 10, 2016. Retrieved December 18, 2016. This article incorporates text from this source, which is in the public domain.

[nasa201611102-2] "Brown Dwarf Microlensing Program". NASA. November 10, 2016. Retrieved December 18, 2016. This article incorporates text from this source, which is in the public domain.

[exoplanetkyoto-3] "Exoplanet Kyoto–OGLE-2015-BLG-1319L". November 10, 2016. Retrieved December 18, 2016. This article incorporates text from this source, which is in the public domain.

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