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Viewings: 3797Recently, scientists were able to discover in ekzoplanetoy system of the star Beta painter of the mineral olivine, which is often found in the composition of comets. That is, for the first time provided evidence of the existence of aksakal, which previously only intended. Interestingly, in this system there "comet depot" - cluster on the periphery, similar to the Kuiper belt.
Ekzoplaneta system in the constellation of the Painter was investigated in detail using space-based telescope "Herschel". Extremely interesting is the fact that the experimental discovery of the mineral olivine in outer space beyond ekzoplanetoy orbit. Actually, this space is much like the Kuiper belt in our Solar system, of which appear "lawless comet"rushing to the Sun is the center of gravity of the Solar system.
All comets well understood - in their composition are the inclusion of crystalline mineral olivine. On this basis it is possible to assume the similarity of Solar and ekzoplanetoy systems that have shaped the marginal zone, where and found olivine.
Exoplanet revolves around a relatively young star of spectral class А5V. This white star Beta Painter is the second luminosity in a small constellation of the southern hemisphere, its age is about 12 million years, the distance to the Beta of the Painter is 63 light years.
Discovered planet is a gas giant, similar to our Jupiter and Saturn. Yes, and its orbit is very similar in the radial parameter to that of Saturn. And then wiped large-scale education of dust and larger particles, down to the wreckage of a large size. A cluster generates huge disk, embracing around the perimeter of the whole ekzoplanetoy orbit.
Assigned a zone that is very similar to the famous Kuiper belt in our Solar system. And that he was identified with the help of a telescope "Herschel", which made observations in the infrared region of the electromagnetic spectrum. However, it should be noted that the Kuiper belt in our Solar system are much older. But experimental information about it so far, little is known is that there are a small number of minor planets, beginning with Pluto, an unknown quantity until the found planetar and a number of comets coming to the Sun from remote limits of this zone.
A remarkable feature in common matter of these marginal disks is the detection of traces of olivine. This mineral is long known as a component of comets, and on Earth he presents very rich, with its deposits extend from the surface to the mantle.
There are two types of olivine - first contains magnesium, and the second includes iron. "Magnesium" variety of the mineral found in the small bodies of the Solar system, mainly comets. But "iron" olivine found only in the bodies of asteroids, which are larger and more durable than the comets, and are at greater heat than comets in the distant Kuiper belt.
Now, the telescope "Herschel" around the star Beta Painter, was found exactly the kind of olivine with magnesium. And was this mineral in the core zone, which is located at a distance 15-45 astronomical units from the star, and therefore, at such a distance, its temperature can drop to -190 C it Should be noted that in much older Solar system the Kuiper belt exists within the boundaries between 30 and 50 astronomical units from the star.
Although in the surrounding ekzoplanetoy system giant belt content with magnesium olivine crystal structure is only 4 percent by weight of all the clouds, but in fact, and this number is significant. "These 4 percent extremely similar to the composition of comet 17P/Holmes and 73P/Sussman - Wachmann containing from 2 to 10 percent of the rich in magnesium olivine", says Ben de Frieze, lead author of the study published in the journal Nature. Then followed the definition: as olivine may crystallize only to the destruction of not more than 10 a. that is, from the Central body, its formation in cold external drive means that the already formed mineral was moved out from the interior of the system.
And here it is quite possible mechanism "beam mixing", when the light from the star takes away from the protoplanetary disk significant amount of material and transports it in an external remote parts of the system. The second agent migration can be stellar winds and turbulent processes in the heated areas of the drive, closest to the sun.
Detection of olivine with magnesium may mean that the efficiency of this process of transfer in the young Solar system was similar to the same process in such stars Beta Painter. The authors of the study suggest that the mechanism of transfer does not depend on the specific characteristics of stellar systems. However, this hypothesis is not grounded enough. Can only conclude that the whereabouts of olivine, rich in magnesium (and wealthy them celestial bodies), very similar in much older Sunny and very young system Beta Painter.
The differences between the two planetary systems are quite substantial: Beta Painter in 1,75 times more massive than our star and has the luminosity, which is 8.7 times higher than the sun. Yes and its ekzoplaneta system is not similar to ours. However, we understand the pride of scientists that conducted the original research. "With the telescope "Herschel" we were able to measure the properties of the ancient material transferred in the process from the initial conception to the formation of a planet in another star system with an accuracy comparable to that of what we could achieve in the laboratory, if we had the material here on Earth" - says the coordinator of the project "Herschel" the European space Agency Goran of Pilbratt.
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