Date: 9 months ago   Category: Markets

Popular idea of stars is disproved


Scientists from the USA and Great Britain have determined parameters of two brown dwarfs rotating around a star the Indian's Epsilon (ε the Indian). It has turned out that their masses exceeds the indicators characteristic of substar objects, that is these dwarfs would have to support nuclear reactions of burning of hydrogen and be stars. Currently any theoretical model can't explain an observed picture completely. Article of scientists is published in The Astrophysical Journal, and her text is available in arXiv.org repository. Substars call objects whose weight is less than 0,08 mass of the Sun. In their subsoil the proton - a proton cycle during which hydrogen turns into helium doesn't proceed. The stars which have lost all gas (Eridan's EF of B) and brown dwarfs — planetopodobny objects which practically don't radiate visible light, but rather bright in an infrared range belong to this type of celestial bodies. The last aren't capable to support thermonuclear reactions for a long time, however at some stage of existence in their subsoil after all nuclear fusion proceeds. The system ε the Indian is at distance of 11,73 light years from Earth. It consists of an orange star, two brown dwarfs of a spectral class T ε the Indian of b and ε the Indian with, existence of the giant planet is also possible. Astronomers have analysed the data obtained by the Inter-American observatory Serro-Tololo and Las-Kampanas Observatory (Chile). It has turned out that weight ε the Indian of b is about 75 mass of Jupiter, and ε the Indian with — it is slightly higher than 70 mass of Jupiter. It does them unique in the sense that they exceed the minimum weight (70 mass of Jupiter) necessary for course of nuclear reactions of burning of hydrogen. Thus, scientists conclude, the applied theoretical models predicting border between stars and substars aren't absolutely right. Researchers have found out what model of evolution of substar objects is closest to results of observations. Brown dwarfs ε the Indian of b and with, most likely, were never stars as their temperature (1200 and 900 kelvins respectively) is much lower than border between stars and brown dwarfs. Perhaps, they were created as brown dwarfs of a spectral class L, and then have cooled down, having reached a class T less than for 10 billion years. However in this case their atmosphere has to be completely transparent though there are data on existence in her of firm particles. It is more than important news in Film of Day Telegram-channel. Subscribe!

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