Astronomers have found a lonely little planet object of unknown nature

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2017-03-15 11:00:10

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Astronomers have found a lonely little planet object of unknown nature

Art little planet view of the object CFBDSIR 2149-0403 that baffled astronomers

In 2012, astronomers discovered in the neighborhood with the system is quite strange insulated space object. According to preliminary calculations it was found that its mass greater than the mass of Jupiter. Based on the data collected, the scientists initially took him for one of the so-called wandering of the planets. But with the amendment that such wandering planets, we just never seen before. Recently completed a new study showing that dubbed CFBDSIR 2149-0403 object may actually not be a planet. The finding may provide much more interest than originally thought.

Despite the fact that most of the planets discovered by science, as a rule, are well-defined orbit their home stars in recent times for astronomers became very frequent opening of the so-called wandering planets, or planets-Wanderers – planetary objects that have either been ejected from their star systems, or even have never been part of any system and therefore "roam freely" across our galaxy. When researchers first discovered CFBDSIR 2149-0403 in 2012, the discovery has sparked interest if for no other reason that the location of this planet was very close to our Solar system – it is about 100 light years from us.

Of Course, before making any conclusions, scientists typically first carry out the rite of initiation validate detected candidates for the right to be called planets. It also happens that initially, the planet is taken by another brown dwarf – an object bezvestnogo class, heavier than the heaviest of the known planets in the visible Universe, but has smaller, in comparison even with the lightest stars, with a mass, which is not enough to support thermonuclear fusion.

On the basis of data that were collected in the first study, the scientists were able to deduce the assumption that the mass of CFBDSIR 2149-0403 4-7 times the mass of Jupiter, which is allowed to write this object as a candidate for wandering the planet, as the mass of the lightest of the detected brown dwarfs are more than 13 times the mass of Jupiter. In addition, the researchers concluded that an errant object could once belong to a star system AB Golden Fish – the group of stars orbiting our galaxy, having approximately the same age with her and, most likely, born in the same place. Based on this, scientists have suggested that the object CFBDSIR 2149-0403 may be relatively young, and its age to be something between 50 and 120 million years.

But it was not as easy as we would like. The fact that the derived assumptions about the rogue planet CFBDSIR 2149-0402 were mostly made on the basis of a few initial observations. For this reason they were not accepted by all within the scientific community. Most of the questions evoked very nature of this object. More precisely, its uncertainty. In the absence of any clear evidence, few could disagree with the fact that this object really is a planet and it does not belong to any of star systems.

To address this issue, the team of astronomers under the leadership of Phillippe Delorme from Grenoble University (France), one of the astronomers who first discovered the object CFBDSIR 2149-0403 in the past several years, was conducting surveillance of the mysterious cosmic body, using a variety of telescopes operating in various ranges of the spectrum. Observations eventually showed that the nature of CFBDSIR 2149-0402 even more mysterious than it seemed initially.

First, in the framework of the new observations, a team of researchers got more accurate calculations of its location and the direction of its motion, and also found that CFBDSIR 2149-0403 cannot be part of a migratory system stars AB Golden Fish.

"New data on the parallax and kinematics of the object rule out the possibility of belonging to any young moving group including AB Golden Fish" — according to a team of scientists in a paper published on the website arXiv.org.

The question of the classification of that object, such a conclusion is both good and bad news. The fact that in addition to providing new information about this object, it also significantly expands the age limit proposed in the framework of the first study.

"the New data, of course, have expanded our knowledge about this object, but at the same time erected his age in the status of a free parameter", — said Delorme portal Phys.org.

The Researchers also found that the object either has a low gravity, or has a high content of metal in its composition, showing a high level of metallicness. The new study also reduced the degree of certainty in terms of the mass of the object. Now scientists can't say for sure whether the planet CFBDSIR 2149-0403, or it can be written in the class of brown dwarfs.

Based On all gathered information about this object can derive two hypotheses: CFBDSIR 2149-0403 is either young (older than 500 million years) a wandering planet with a mass between 2 and 13 times the mass of Jupiter, or is it old (age 2 to 3 billion years) brown dwarf with a very large stock of iron and weighing from 2 to 40 times the mass of Jupiter. However, according to Delorme, this object can ever be something other than we had never met.

"CFBDSIR 2149-0403 is unusual pojistny object that is either a "free-floating planet", or some extremely rare species of brown dwarfs with high metal concentration in its composition. Perhaps – in General is a combination of the two types of objects" — said Delorme.

The Results of research scientists from Grenoble University was published for peer review on the portal arXiv.org so while other astronomers with them to get acquainted, to make any findings in relation to the CFBDSIR 2149-0403. But there is good news: CFBDSIR 2149-0403 is relatively close to us, and therefore there is an opportunity for it monitoring, which may help eventually to establish its true nature. It is possible that science could face a completely new class of little planet objects that have previously never been seen.

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