Palestine today – Gaza
It’s 10:28 PM
September 28, 2022
An American observatory reported that the first stars in the universe were significantly different from the Sun and similar stars, because they did not contain metals.
The press service of the American observatory “Noire Lab” said that the minerals were formed only in the course of thermonuclear fusion, and following the explosions of the first stars, they became part of future generations.
Stars without heavy elements can be of any size, so the oldest luminous stars can be hundreds of times heavier than the Sun.
However, these stars did not live long, and ended their existence as the most powerful unstable binary supernova, according to the Noir Lab observatory.
Yozuru Yoshi of the University of Tokyo’s Astronomical Institute and his colleagues discovered traces of a supernova explosion located on the quasar.J1342 + 0928Which is 13 billion light-years from Earth (Quasars are ultra-luminous astronomical objects and are the active nuclei of small galaxies, but due to the so-called redshift, they can be observed mainly in the radio band).
The researchers were also interested in whether iron, magnesium, and some other atoms were present during the explosion.
Scientists concluded that it was practically absent in the early universe, as it appeared largely only in the stars of the third group (the first generation following the Big Bang).
Analysis of the radiation from this quasar showed an explosion in this ancient galaxy, during which more iron was produced than magnesium.
In a similar way, subsequent theoretical calculations by scientists have shown that pairwise unstable supernovae arise during the explosion and provide optimal conditions for the formation of heavier iron cores.
As scientists hope, further study of quasar J1342 + 0928 Subsequent research on other effects of unstable pairwise supernova explosions will help clarify how these powerful explosions affect the evolution of chemical elements.
It will also allow astronomers to compile a typical picture of the stars of the third group, which generated these explosions in the early ages of the universe’s existence.