Simulations show that the first stars in the universe were giants

Astrophysicists conducted a computer simulation of the dark ages of the universe - the era between the formation of the relic

radiation and the formation of the first stars. The analysis showed that early star formation was preceded by complex interactions, and the mass of the first stars was several orders of magnitude higher than modern ones.

In their model, scientists used all knowncosmological theory "components" of this era. Among them are dark matter that helps galaxies grow, the evolution and condensation of neutral gas, radiation that can cool and sometimes heat gas, and cold fronts. These are fast-moving streams of frozen matter that crash into already formed structures.

The simulation showed that the neutral gas inthe early universe began to assemble and stick together. The hydrogen and helium gave off some heat, which allowed the neutral gas clumps to slowly reach a high density. Multiple interactions between neutral gas and the radiation associated with its heating gradually led to massive accumulations of neutral gas - the beginning of the first galaxies.

The gas deep inside these protogalaxies formedrapidly rotating accretion disks are fast-flowing rings of matter that form around any massive object. Meanwhile, cold gas fronts hit the outer edges of the protogalaxies. The coldest and most massive of them penetrated into the protogalaxy up to the accretion disk.

These cold fronts crashed into the discs, quicklyincreasing their mass and density to a critical threshold, thereby allowing the first stars to emerge. The formations assembled from light elements were huge, but lived for less than a million years, dying during supernova explosions. The products of the first reactions of internal fusion - elements heavier than hydrogen and helium - laid the foundation for the next round of star formation.

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