OGLE-2013-BLG-0723L - A Venus-Mass Planet orbiting a Brown Dwarf in a Binary

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OGLE-2013-BLG-0723L - A Venus-Mass Planet orbiting a Brown Dwarf in a Binary

Post by Sirius_Alpha on 9th July 2015, 8:24 pm

A Venus-Mass Planet orbiting a Brown Dwarf
http://arxiv.org/abs/1507.02388

The co-planarity of solar-system planets led Kant to suggest that they formed from an accretion disk, and the discovery of hundreds of such disks around young stars as well as hundreds of co-planar planetary systems by the {\it Kepler} satellite demonstrate that this formation mechanism is extremely widespread. Many moons in the solar system, such as the Galilean moons of Jupiter, also formed out of the accretion disks that coalesced into the giant planets. We report here the discovery of an intermediate system OGLE-2013-BLG-0723LB/Bb composed of a Venus-mass planet orbiting a brown dwarf, which may be viewed either as a scaled down version of a planet plus star or as a scaled up version of a moon plus planet orbiting a star. The latter analogy can be further extended since they orbit in the potential of a larger, stellar body. For ice-rock companions formed in the outer parts of accretion disks, like Uranus and Callisto, the scaled masses and separations of the three types of systems are similar, leading us to suggest that formation processes of companions within accretion disks around stars, brown dwarfs, and planets are similar.

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Re: OGLE-2013-BLG-0723L - A Venus-Mass Planet orbiting a Brown Dwarf in a Binary

Post by Stalker on 10th July 2015, 12:56 am

Amazing! This is a real brown dwarf planet!

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Re: OGLE-2013-BLG-0723L - A Venus-Mass Planet orbiting a Brown Dwarf in a Binary

Post by tommi59 on 10th July 2015, 3:25 am

Lets try to detect transit tongue
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Re: OGLE-2013-BLG-0723L - A Venus-Mass Planet orbiting a Brown Dwarf in a Binary

Post by Lazarus on 10th July 2015, 12:27 pm

Good luck with the transit detection when the host hasn't been seen Razz

Quite an interesting system, potentially a quadruple system, with the detected triple (star+(BD+planet)) potentially itself orbiting a brighter star. Sometimes the limits of microlensing are quite frustrating, would be nice to have a better handle on the orbital properties.
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Re: OGLE-2013-BLG-0723L - A Venus-Mass Planet orbiting a Brown Dwarf in a Binary

Post by Stalker on 18th February 2016, 10:39 am

Without the distinction between a planet and a brown dwarf companion, this is the first system with a confirmed exomoon.

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Re: OGLE-2013-BLG-0723L - A Venus-Mass Planet orbiting a Brown Dwarf in a Binary

Post by Led_Zep on 18th February 2016, 6:14 pm

???
Have you something new about the system ?
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Re: OGLE-2013-BLG-0723L - A Venus-Mass Planet orbiting a Brown Dwarf in a Binary

Post by Stalker on 19th February 2016, 3:02 am

Nothing. Just that 35Mj objects orbiting stars are more and more considered as planets and not brown dwarfs. In this ppoint of view, you have a 35Mj planet with an exomoon.

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Re: OGLE-2013-BLG-0723L - A Venus-Mass Planet orbiting a Brown Dwarf in a Binary

Post by tommi59 on 19th February 2016, 5:07 am

They want to persuade us that this is exomoon but is not
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Re: OGLE-2013-BLG-0723L - A Venus-Mass Planet orbiting a Brown Dwarf in a Binary

Post by Stalker on 19th February 2016, 8:33 am

"they" who?

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Re: OGLE-2013-BLG-0723L - A Venus-Mass Planet orbiting a Brown Dwarf in a Binary

Post by Sirius_Alpha on 24th April 2016, 8:27 pm

A better-fitting, less complex solution to the light curve has been found, where there is no need to invoke a planetary companion. The lensing system is more likely an M dwarf binary.
http://arxiv.org/abs/1604.06533

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Re: OGLE-2013-BLG-0723L - A Venus-Mass Planet orbiting a Brown Dwarf in a Binary

Post by Lazarus on 25th April 2016, 12:52 pm

Well that's a pity. This was one of the more interesting systems.
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Re: OGLE-2013-BLG-0723L - A Venus-Mass Planet orbiting a Brown Dwarf in a Binary

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