Scientists found the key to understanding the appearance of the first stars in the universe in the simplest star compositions, known as extremely weak in metals (EMP, extremely metal poor stars). Work Published on Preprint Portal Arxiv.
Stars, such as our sun, are full of so -called metals – elements are heavier than hydrogen and helium, such as carbon, nitrogen, iron and even gold. These substances were created as a result of supernova explosions and clashes of neutron stars. However, you can still find stars that still do not contain heavy elements in space. Those who have special value for science.
Such objects are considered to be the stars of the second generation of the remains of the first luminaires of almost entirely hydrogen and helium. Since the first generation of stars themselves have been lost for a long time (they lived very large and only a few million years), the EMP star continues to be the only affordable price to examine their property.
The study showed that the EMP star helps to understand the mass and life expectancy of the first stars and analyzed the simple proportions of elements such as carbon, nitrogen and oxygen. These rates directly depend on the mass of the source star, which makes the EMP’s first kind of “trail ın of the first Supernova.
Surprisingly, all the stars with extremely low metals are not found in Galo Milky Way as previously thought. Some found on the disc of our galaxy that could show more complex processes of star migration. Perhaps there are even relatively young stars with low metals, which arouses doubt the traditional star evolution models, such stars must be old.
Authors emphasize: much more data should be collected for a complete understanding. It is not easy to recognize that spectroscopic equipment with an EMP star height is necessary to distinguish a “slightly poor” star from “extremely poor” metals.
Previously, scientists Created “Space Radio” for the search for dark matter.
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Source: Gazeta
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