Date: 5 months ago   Category: Cosmos

Have found a huge abnormal object in space


Astronomers of National astronomical observatory in China (NAOC) have found a star with abnormally high content of lithium (Li). It is reported in the Nature Astronomy magazine. It is known that lithium isn't capable to exist long in deep layers of the atmosphere of stars because of high temperature. As a result in the warmed red giants this element has to be present at very small quantities. However in 1982 astronomers have found the first red giant with the high content of lithium that contradicted the existing models of evolution of stars. In the last three decades only 150 similar objects have been found and only in three of them the prevalence of lithium (A) reaches 3,3 (And shows the attitude of amount of atoms of lithium towards amount of atoms of hydrogen of a star concerning the Sun expressed in a logarithmic scale). Scientists have found a star of TYC 429-2097-1 which has the highest level of prevalence of lithium among the known stars (And = 4,51). He is about one thousand times higher than standard values (And = 1,5). Was considered earlier that the high level of lithium is a consequence of "pollution" from an external source, for example, of the gas giant of a class a floodlight (or the brown dwarf) which has faced a star, less hot and young star partner or the interstellar environment. However abnormally high content of metal characteristic of TYC 429-2097-1 is inexplicable from this point of view as external sources possess a limited reserve of lithium. Only own production Li by a star can resolve a paradox. Synthesis of lithium in a star is caused by the mechanism of Cameron-Fowler which is carried out through synthesis of atom of beryllium (Ве) from helium where for lithium too high temperature. As a result of convection of Ve it is taken out on a surface where in colder conditions turns into lithium. However this mechanism for giant stars demands additional hashing of layers. At the same time results of modeling have shown that this process provides 429-2097-1 level of content of lithium observed for TYC. It is more than important news in Film of Day Telegram-channel. Subscribe!

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