Gas streams of stars

Gas streams of stars stopped growth of galaxy

Scientists received the evident certificate that growth of galaxy is limited at the expense of new stars. Supervision showed that new stars throw out gas streams which could go on a further increment of their quantity out of galaxy limits. The group of researchers of Germany, Canada and the USA used ALMA radio telescope for supervision. This tool is sensitive to a radio emission of submillimetric range. Studying the central part of a galaxy of NGC 253 scientists found some gas streams proceeding out of its limits. Thus the principle of supervision based on registration of radio waves, allowed to see only streams of the gas consisting of a monoxide of carbon that is carbon monoxide. The chemical composition of gas specifies that streams of substance are formed not at the expense of hot plasma of stars (it consists generally of hydrogen), and at the expense of the cold interstellar gas picked up by a star wind.

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Snow in TW Hydrae

ALMA radio telescope noticed snow in TW Hydrae system

Thanks to an ALMA radio telescope of scientists found snow in very young planetary system. According to scientists, for the first time in the remote young planetary system was recorded snow. Using a Atacama Large Millimeter/submillimeter Array (ALMA) radio telescope, astronomers photographed a precipitation in the form of snow in system of the TW Hydrae. It is a star in constellation of Hydra being in 176 light years from us. This is the orange dwarf of a class K of the main sequence like T Tauruses. By the sizes and weight it is slightly less than our Sun. The TW Hydrae is included into star association with the name of the same name into which also enters and 2M1207 – the red dwarf with recently opened planet. The proto planetary disk is found in a star. The age of a star makes about 10 million years. Astronomers explain that small parts of water quickly freeze in planetary TW system of the Hydrae, turning into snowflakes.

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The Birth of star in the Milky Way

The birth of a large star in the Milky Way pictured ALMA radio telescope

With help of new supervision of Atacama Large Millimeter Array(ALMA) radio telescope, settling down to the Atacama Desert, Chile, was found the huge star germ which weight exceeds by 500 times of our Sun. Now it is development of further growth. In the Milky Way didn’t find such star yet. This process will come to the end the birth of the new star which luminosity will be equal about 100 solar masses. There are two opinions of an origin of such massive stars. One of opinions says that the parental cloud breaks up to parts. In each part there is a kernel then each of them starts contracting, thereby forming a new star. In other opinion, the cloud contracts as a single whole. The matter of a cloud goes to its center and already some huge stars there start appearing.

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Oph-IRS 48 system

Astronomers made out protoplanetary of a dust trap

The astronomers working with data of new observatory of ALMA, for the first time made out a dust trap in which comets and germs of future planets are formed round a young star. Supervision over the Oph-IRS 48 system located at distance of 400 light years from Earth, were carried out in the millimetric range with help of only a half of telescopes of observatory of ALMA. Nevertheless, permission of the image allowed to make out distribution of particles of a dust of the different size round a star. Scientists found out that rather large particles about a millimeter in size are distributed in a protoplanetary disk extremely unevenly. Instead of ring-shaped structure, which the astronomers expected to see, they found a form, in accuracy similar to a cashew nut. According to the scientists, the found area represents a dust trap, where particles of a space dust are capable to stick together with each other, growing to the sizes about a kilometer. In other areas of a protoplanetary disk growth of clots is limited by their continuous mutual collision. Authors explain that in a dust trap of Oph-IRS 48 system most probably formation of comets, instead of full-fledged planets.

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ALMA Radio Telescope

ALMA Radio Telescope – The Most Professional Telescope of the World

The most powerful radio telescope of the world will pull back the curtain on the planet obscuring birth. During last two years, the scientists added some antennas and resolution to the Atacama Large Millimater Array (ALMA). The ALMA radio telescope will start its operation in the next week. Last year the AlMA measured the orbits, which moves around the star, and found that the orbits has less dimensions, than the scientists thought. There is two methods for telescopes to find a new exoplanets: one- the gravitational wobble, second- changes of brightness during the passing directly in front of its star. ALMA radio telescope will announce the converting of cold gas into clouds in the protostars. The secret of 1,3 billion facility’s solution are height and distance. Facilities of ALMA sit on a 5000 meter high above the sea. The astronomers, working in ALMA facility at 2900 meters, will use oxygen. The ALMA system include approximately 50 antennas. The system of operating is following: the antennas snag an astronomical signals from the sky, combine all the results in the computer, for getting final information regarding the place, form where they snag the signal.This system allows ALMA not only to observe the young planets, but also pin down life – building block in gas clouds.

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