Ancient astronomers pointed star the way to the early Universe – Moskovsky Komsomolets

The chemical composition of the star researchers provided indirect evidence of the existence of early supermassive stars

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Star age 13 billion years may contain material derived it from the earliest stars in the universe, it should be from a study led by Wako Aoki from the National Astronomical Observatory of Japan.

The second generation of stars formed from matter “vykovanoy” in the heart of the first generation. Star SDS J0018-0939 in the interior of the Milky Way is the teaching information on the composition of the first stars in the universe. Figure .: National Astronomical Observatory of Japan.

Looking Subaru optical telescope in Hawaii, Aoki and his team of researchers analyzed the chemical composition of several low-mass stars, including SDS J0018-0939 – arhidrevney Stars shining at 1000 light years from Earth in the halo surrounding the Milky Way galaxy, according to The Space Reporter.

This star has a very low content of elements heavier than hydrogen and helium and contains material produced at a time when older stars, potentially 200 times larger than our sun, a supernova exploded.

All the other elements in its composition except hydrogen and helium, astronomers referred to as “metals”.

According to Aoki, chemical composition of the star shows that it has absorbed the material from a giant star, and not a few less massive stars. If she swallowed him material from several supernovae, then “would be erased” specificity proportions in its “interior”, “Aoki explained.

Early Star Universe, known as Population III, composed of hydrogen and helium, resulting from the Big Bang 13.8 billion years ago. They were massive and relatively quickly exhausted their resources.

At that age, when they existed, Star Populations III produced in their cores through nuclear fusion to heavier elements . these elements later in supernova explosions were thrown into space.

And already then these heavier elements formed new stars.

Today, science has little data exist today stars Populations III but scientists can discern their composition, studying arhidrevnie known stars, which consist of materials formed at the time of the death of first-generation stars.

Computer models show that populations III stars were extremely massive, though still like judgments are considered speculative (theoretical), due to the fact that these stars have never been observed by astronomers.

His death is extremely massive stars so-called Populations III significantly influenced the process of formation of new stars and galaxies, finished Wako Aoki.