Sunday , April 18 2021

Is The Fleet & # 39; Planet Nine & # 39; actually a massive ring of Debris in the Outer Solar System?

Art illustration of small objects within the Kuiper band.
Image: ESO / M. Kornmesser

The strange orbital rings of objects outside of Neptune have led scientists to speculate on the existence of a so-called Planet Nine – a hypothetical large planet in the outskirts of the Solar System. New planet-based research is not required to realize the anomalous pathways, and that a massive ring of pike is a more plausible explanation. Criticism of the proposed disc is that more proof is needed.

The immense Planet Nine, sometimes referred to as Planet X, is being resurrected by the lousy orbit of some Kuiper Belt Objects, also called Trans-Neptunian Objects (TNOs). Astronomers have documented for 30 anomalous TNOs to current objects with non-existent and clean orbits, and a unique clustering behavior. To explain this, astronomers have made the presence of an even-found planet. To work, Planet Nine had to have 200 astronomical units (AU), or about 18.6 billion billions, from its meaning, and having 10 times as much mass as earth. The gravitational influence of this hypothetical planet is "sheep", or somewhat shaken, TNOs in their observed pies, according to this theory.

Artwork by Planet Nine.
Image: Caltech / R. Sear

New research published this week in a Astronomical Yearbook a fascinating alternative to the Planet Nine hypotheses. In response to a mystical plan to explain the strict orbit of certain Kuiper-belt objects, the authors set up & # 39; a new study Antranik Sephilian from Cambridge University and Jihad Touma & # 39; An American university of Beirut, which consists of an external Solar System disk from Rock and ice can make the same effect as a large outside world.

Sefylan and Touma gave no convincing evidence for this all-thought discussion, just for no one. Instead, the authors present a new mathematical model that shows the theoretical ability of this proposed structure. Importantly, the new model did not fully take into account the existence of Planet Nine, or at least a smaller version of it, such as the combinations of gravity influences of an external planet and an extreme discrepancy, the TNO orbits products could also do.

"The Planet Nine hypothesis is a fascinating one, but when the hypothetical ninth planet exists, it has removed the attractive vacation," Sefilian said in a statement. "We wanted to see if there could be another, less dramatic and perhaps more natural, cause for the unwanted orbits that we see in some TNOs. We thought, instead of a ninth planet, and then Worrying about their formation and unusual roundabout, why not only count on the gravity of small objects that are a disc that & # 39; t continue the orbit of Neptune and see what it does for us? "

Sefylity and Touma are not the first ones to represent this theory. In 2016, a study by astronomer Anne-Marie Madigan from the University of California, Berkeley, included an external Kuiper-belt disk consisting of ice-covered planetesimal – the bits and pieces left behind by The formation of the Solar System – can be responsible for the foreign TNO orbits. The new paper is different from what a mathematical model was used to see how this hypothetical disk, and the eight planets of the Solar System, influenced TNO's orbital configuration.

In its new model, Planet Nine was replaced by the hypothetical disk, and the objects it received were recruited to broaden a wide area. The collective gravitational force of these objects, according to Sefilian, could "register on & # 39; the orbits that you & # 39; see in some TNOs".

However, if this external band is planetary, it consists of conventional features across the number and total mass of objects outside Neptune. Current theories suggest the total mass that is the mass of earth every tenth century, according to the study cars, but to work it as described, it must be the mass of earth at about 10 times. So it's a big representation, one that requires further.

"Because we do not write direct judgment for the disc, we do not have it for Planet Nine, why are we exploring other possibilities. However, it is interesting to note that estimates of Kuiper analogues are & # 39; 39, the other stars, such as planetarium models, see massive remaining populations of dirt, "said Sefilian. "It is also possible that both things can be true – there can be a massive disk and a ninth planet. With the discovery of every new TNO, we collect more gestures that can help them."

The evidence of the existence of this bronze, such as the evidence of Planet Nine's existence, is not as simple as searching in the distance with our telescopes, said astronomer Carlos de la Fuente Marcos of the Complutense University of Madrid .

"Such a structure, as it really is, does not seem to be covered by current telescopic features, either on the ground or space-based," Marcos, which is not connected to the new study, Gizmodo said. "It will be difficult to confirm this hypothesis with currently available or planted telescopes," he added: "The scenario investigated in this work sounds rather speculative, but the fact is that we do not know about the Solar system then Pluto. "

We also spoke with Caltech astronomer Konstantin Batygin, who, along with his colleague Mike Brown, evidence evidence for the existence of Planet Nine back in 2016. The mathematics in the new study is "first rate," Batygin said, but he pointed to several astrophysical shortages.

For one, the Kuiper gurdle is at & # 39; one end of & # 39; The so-called – the so-called "Superfluous" at approximately 48 AU, or far the TNOs are reduced. Second, Bodybuilding points to recent research following the Kuiper belt, a cumulative mass closer to 50 times less than that of Earth, which sails less than the conventional one-third estimates, and so much less than the 10-year estimate. These two data points, which are not included, mean that the massive disk is represented by Sefilian and Touma "should start at hundreds of AU & # 39; from a sentence from & # 39; a sentence based on what known and of heaven's mechanics, which is not plausible, Batgyin says.

"It is well established that stars like the sun typically form in clusters, and the Solar System is no exception," he said to Gizmodo. "That is, cosmo-chemical arguments as the existence of a cloud over it call the sun in a cluster of approximately 10,000 stars for about 100 million years after its formation – it brings us to a third problem with The study: The consistency of the innovative disk would previously be turned off from a Solar system, both by the cumulative gravitational potential of & # 39; s birth cluster & # 39; a sun as the [random] perturbations by continuous stars. "

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He also found it hard to believe that a massive protoplanetary disk can live at a distance above 100 AU, as the new study suggests.

"Typical protoplanet counts will only range from 30 to 50 hours," he said, "why would the protoplanetary disk from & # 39; stop at about 30 AU, but then start up 100 hours? How was it Constructed, Exceptional Nature of a Saved Disk in First Place How did it consist of & # 39; observation observation observation so far? "

All these questions, and others, "do not remain accessible through the study," Batygin said. Ultimately, the new paper "falls like an astrophysical plausible explanation for the anomalous structure of the further solar system", he said.

No question, the primary weakness of one's paper is the lack of astronomical evidences, but the same debt can be made about Planet Nine's benefits. It is entirely possible, as some studies have argued that no orbital anomalies exist in a Kuiper belt, and that scientists are victims of a judgment of & # 39; e rating. In other words, reliable data is needed to see what is sharp. If astronomers continue to search for Planet Nine, they will also need to be radiant for drawings of an unexpected band of dirt at & # 39; an outside of our Solar System.

In & # 39; science does not feel like pursuing multiple paths of research.

[Astronomical Journal]

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