Evidence for a ~Jovian Mass Companion in the Oort Cloud

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Evidence for a ~Jovian Mass Companion in the Oort Cloud

Post by Sirius_Alpha on 26th April 2010, 8:17 pm

Persistent Evidence of a Jovian Mass Solar Companion in the Oort Cloud
http://arxiv.org/abs/1004.4584

Abstract wrote:We present an updated dynamical and statistical analysis of outer Oort cloud cometary evidence suggesting the sun has a wide-binary Jovian mass companion. The results support a conjecture that there exists a companion of mass ~ 1-4 M_Jup orbiting in the innermost region of the outer Oort cloud. Our most restrictive prediction is that the orientation angles of the orbit normal in galactic coordinates are centered on the galactic longitude of the ascending node Omega = 319 degree and the galactic inclination i = 103 degree (or the opposite direction) with an uncertainty in the normal direction subtending ~ 2% of the sky. A Bayesian statistical analysis suggests that the probability of the companion hypothesis is comparable to or greater than the probability of the null hypothesis of a statistical fluke. Such a companion could also have produced the detached Kuiper Belt object Sedna. The putative companion could be easily detected by the recently launched Wide-field Infrared Survey Explorer (WISE).

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Re: Evidence for a ~Jovian Mass Companion in the Oort Cloud

Post by Lazarus on 28th April 2010, 6:09 pm

If it exists then I guess we will have a new fight over the definition of "planet". Would such an object be a sub-brown dwarf, a planet (perhaps scattered outwards during the formation of the solar system), or what?
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Re: Evidence for a ~Jovian Mass Companion in the Oort Cloud

Post by Sirius_Alpha on 28th April 2010, 8:16 pm

What possibly could catapult a Jovian-mass planet out the inner Kuiper Belt? Wouldn't there need to be a more massive planet still around?

I can't imagine getting a planet that far out without the solar system history being far more chaotic than believed. Would there be visible signs of such a chaotic history?

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Re: Evidence for a ~Jovian Mass Companion in the Oort Cloud

Post by Stalker on 29th April 2010, 1:16 am

May be a planet formed like a star?
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Re: Evidence for a ~Jovian Mass Companion in the Oort Cloud

Post by Sirius_Alpha on 29th April 2010, 5:17 am

Difficult to imagine as well due to the unavailability of material that far out.

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Re: Evidence for a ~Jovian Mass Companion in the Oort Cloud

Post by Stalker on 29th April 2010, 7:58 am

Or a captured star like formed planet? (I think this is an artefact but why not...)

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Re: Evidence for a ~Jovian Mass Companion in the Oort Cloud

Post by Edasich on 29th April 2010, 8:12 am

A planet kicked off from nearby binary system and captured by Sun. I think about Alpha Centauri...
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Re: Evidence for a ~Jovian Mass Companion in the Oort Cloud

Post by Stalker on 29th April 2010, 11:31 am

Or Algol, 7 600 000 years ago...

But if rogue planets are 3 time more common than stars, it must be one of them.

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Re: Evidence for a ~Jovian Mass Companion in the Oort Cloud

Post by Edasich on 29th April 2010, 3:43 pm

Algol crossed Sol's neighbourhood 7.6 million years ago, in Late Miocene?
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Re: Evidence for a ~Jovian Mass Companion in the Oort Cloud

Post by NuclearVacuum on 29th April 2010, 9:28 pm

That is amazing. If I may, it looks like the Ninth planet is back =P

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Re: Evidence for a ~Jovian Mass Companion in the Oort Cloud

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