HD 131399 - A young triple-star system with a planet imaged by SPHERE

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HD 131399 - A young triple-star system with a planet imaged by SPHERE

Post by Sirius_Alpha on 7th July 2016, 3:27 pm

A Surprising Planet with Three Suns
http://www.eso.org/public/news/eso1624/

A team of astronomers have used the SPHERE instrument on ESO’s Very Large Telescope to image the first planet ever found in a wide orbit inside a triple-star system. The orbit of such a planet had been expected to be unstable, probably resulting in the planet being quickly ejected from the system. But somehow this one survives. This unexpected observation suggests that such systems may actually be more common than previously thought. The results will be published online in the journal Science on 7 July 2016.



Maybe this will be addressed in the paper when it comes out, but I don't see any evidence that the *true* separation between the A and BC pair are known. The projected separation is only three times the projected planetary separation, but given how much difference there is between the distances from us of the A and BC pair, the BC pair could be much further from the planet than this image suggests, and the system could be a lot more stable.

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Re: HD 131399 - A young triple-star system with a planet imaged by SPHERE

Post by Led_Zep on 7th July 2016, 3:46 pm

Fantastic !!

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Re: HD 131399 - A young triple-star system with a planet imaged by SPHERE

Post by Lazarus on 7th July 2016, 4:26 pm

Usually ESO is pretty good at putting the research papers in their press releases, hopefully it will appear soon.

Interesting system but at the moment I'm with Sirius_Alpha on this one: projected separations can be misleading. I wonder what kind of constraints can be made for the orbital motion.

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Re: HD 131399 - A young triple-star system with a planet imaged by SPHERE

Post by Led_Zep on 7th July 2016, 5:51 pm

http://science.sciencemag.org/content/early/2016/07/06/science.aaf9671

Link to research article (Science Magazine)
If you pay…

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Re: HD 131399 - A young triple-star system with a planet imaged by SPHERE

Post by Stalker on 8th July 2016, 3:53 am

Sci-Hub...

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Re: HD 131399 - A young triple-star system with a planet imaged by SPHERE

Post by Edasich on 8th July 2016, 4:59 am

It's such a great discovery, especially in imaging field.

But... aren't we neglecting HD 40979 Ab?? Wink

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Re: HD 131399 - A young triple-star system with a planet imaged by SPHERE

Post by Sirius_Alpha on 11th July 2016, 8:26 pm

Now on arXiv.

Direct Imaging Discovery of a Jovian Exoplanet Within a Triple Star System
http://arxiv.org/abs/1607.02525

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Re: HD 131399 - A young triple-star system with a planet imaged by SPHERE

Post by Sirius_Alpha on 1st November 2016, 8:14 pm

The unstable fate of the planet orbiting the A-star in the HD 131399 triple stellar system
https://arxiv.org/abs/1611.00007

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Re: HD 131399 - A young triple-star system with a planet imaged by SPHERE

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