Astronomers have found a lone planetoobrazny object of unknown nature
The artistic representation of an object planetoobraznogo CFBDSIR 2149-0403, stumped astronomers
In 2012, astronomers have discovered in the neighborhood of our system rather strange isolated space object. According to preliminary calculations it was found that its mass is the mass of Jupiter. On the basis of the data collected, scientists initially mistook him for one of the so-called wandering planets. True, adjusting to the fact that these wandering planets we definitely never seen before. Most recently it completed a new study has shown that the named object CFBDSIR 2149-0403 actually may not be a planet. When this finding may represent a far greater interest than originally calculated.
Despite the fact that the majority of the detected planets science, as a rule, are in well-defined orbits its home star, recently astronomers have become very common discovery of the phenomenon of so-called wandering planets, or planets pilgrims - planetary objects that They have either been thrown out of their star systems, if any, had never been part of any system, and so the "free walk" across our galaxy. When researchers first discovered CFBDSIR 2149-0403 in 2012, the discovery has aroused interest, if only because of the location of the "planet" was very close to our solar system - is located about 100 light-years away.
Of course, before making any conclusions, scientists usually first
is performed the rite of initiation check the detected candidates for the right to be called planets. It also happens that the original of the planet taken another brown dwarf - podzvezdnogo class object is heavier than the heaviest of all known planets in the visible universe, but it has less than even the lightest stars, mass, which is not enough to support a thermonuclear synthesis. On the basis of data that have been collected in the first study, the researchers were able to deduce the assumption that CFBDSIR 2149-0403 mass in 4-7 times the mass of Jupiter, which is allowed to record the object as a candidate for rogue planet as the mass the lightest of the brown dwarfs discovered more than 13 times the mass of Jupiter. In addition, scientists have concluded that errant object could once belonged to the star AB Doradus system - a relatively young group of stars orbiting our galaxy, having approximately the same age and, most likely, were born in the same place. Based on all this, scientists have suggested that CFBDSIR 2149-0403 object may be relatively young, and his age is that somewhere between 50 and 120 million years old.
But it was not as easy as we would like. The fact that inferred assumptions about a wandering planet CFBDSIR 2149-0402 were mainly made on the basis of just a few initial observations. For this reason, they have been accepted by not all within the scientific community. Most issues are the very nature of the object. More precisely, its uncertainty. In the absence of any clear evidence, few could agree that this object really is a planet and it does not belong to any one of the star systems.
To address this issue, a group of astronomers led by Phillippe Delorme from the University of Grenoble (France) - one of the astronomers who first discovered the object CFBDSIR 2149-0403 - conducted surveillance in the mysterious cosmic body over the last few years, using a variety of telescopes, operating in various regions of the spectrum. Observations eventually showed that the nature of CFBDSIR 2149-0402 is even more mysterious than originally seemed. Firstly, within the framework of the new observations a team of researchers to obtain more accurate estimates of its location and direction of its motion, and found that CFBDSIR 2149-0403 can not be part of the migratory system AB Doradus stars.
"New data on the parallax of the object and the kinematics exclude the possibility of his belonging to any group traveling was young, including AB Doradus," - said a team of scientists in a paper published on arXiv.org site.
In the matter of classification of this object, this conclusion is right and good and bad news. The fact is that in addition to providing new information about the object, it is also seriously expands its age limit is proposed in the framework of the first even research.
"The new data, of course, extended our knowledge of this subject, but at the same time it was built in the age of free parameter status," - said Delorme Phys.org portal.
The researchers also found that the object has a low-gravity, or has a high metal content in its composition, showing a high level of metallicity. The new study also reduced the degree of certainty with respect to the mass of the object. Scientists now can not say for sure whether the planet CFBDSIR 2149-0403, or else it can be written in a class of brown dwarfs.
Based on all the collected information at this time about the object can be deduced two hypotheses: CFBDSIR 2149-0403 is a young (age less than 500 million years) wandering planets with masses between 2 and 13 times the mass of Jupiter, or is it an old (aged 2 to 3 billion years) brown dwarf with a very large supply of iron and weight, from 2 to 40 times the mass of Jupiter. However, according to Delorme, the object may even be something different from what we had never met.
"CFBDSIR 2149-0403 - an unusual podzvezdny object that is a" free-floating planet, "or in some extremely rare species of brown dwarfs with a high concentration of metal in its composition. A possible - even a combination of these two types of objects ", - says Delorme.
The results of the research of scientists from the University of Grenoble were published for the scientific peer review on arXiv.org website, so long as other astronomers are not acquainted with them, to make any conclusions in relation to CFBDSIR 2149-0403 will be soon. But there is good news: CFBDSIR 2149-0403 is relatively close to us, and therefore, there is an opportunity for him to further observations that may help to eventually establish its true nature. It is possible that science could be faced with an entirely new class of planetoobraznyh objects that previously no one had ever seen.