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Astronomers observe the birth of many star system - VIDEO PDF Print E-mail
Friday, 13 February 2015 09:12

Quite often, the stars in the galaxy does not live alone, as is the case with the Sun, and in the systems of two or more bodies. For example do not need to go far - located next door to us, Alpha Centauri consists of three stars.

So far, astrophysicists can not say exactly why. According to one version, all the stars are formed in groups, and then some of them have found themselves under the influence of gravitational forces. According to other suggestions, they are people who are born alone or with twin brothers.

Perhaps a new study of an international group of astronomers will help to better understand this question. His findings were published in the edition of Nature.
 

Scientists used the two largest radio telescope in the world - Very Large Scale antenna array (VLA) and the "Green Bank" (GBT), to explore the cloud of gas Bernard 5, located at a distance of eight thoUSAnd light-years from Earth in the constellation Perseus.

In the central core, or so-called stellar nurseries researchers previously found a young protostar and decided to take a closer look at the this area. With VLA they recorded the radio emission of methane molecules in the cloud and surprisingly found there are three more dense clumps of matter that, in their opinion, will soon also become stars. Most likely, it will be medium-sized objects ten times less than the Sun, distant from each other by a few thoUSAnd astronomical units.

"We know that new stars will eventually form a star system, because our observations indicate gravitational connection between bunches - said in a press release ETH Zurich Jaime Pineda (Jaime Pineda). - This is the first time we were able to show the gravitational interaction of young formations. "

As a rule, a system consisting of more than three objects are unstable, and this case is no exception. Computer models have shown that at least one star will eventually be thrown away outside the group, but the remaining three will be able to keep the gravitational links and make a stable system.



The discovery of an embryonic star system itself is an important event for science. But scientists also found that clumps of gas turned into a giant glowing balls in the next 40,000 years. Pineda and his colleagues emphasize that on space standards, this process will take place "very quickly".

"Almost half of all stars are members of systems, but to catch them at the earliest stages of formation was difficult. Now, thanks to a combination of VLA and GBT, we have an idea of how such systems are born. Our next step will be to study other examples of star formation. We will use the new features VLA and other powerful tools "- adds Pineda.


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