Scientists tasked a supercomputer to build millions of simulated universes

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Understanding how our reality is formed in billions of years is not easy for scientists. There are only a dozen theories about how the Big Bang works and the immediate consequences, but a team-led researcher at the University of Arizona believes they might accidentally discover some of the secrets of galaxies by asking the supercomputer to simulate millions of virtuals. The universe, see which ones are closest to what we see today.



In a new research paper published in the Royal Astronomical Society Monthly, the team explained how they used a supercomputer system nicknamed “Cosmic Machines” to observe the formation of billions of (virtual) galaxies in front of them.

“On a computer, we can create many different universes and compare them to the actual universe, which allows us to infer which rules lead to what we see,” said Peter Behroozi, the first author of the study. Said in the statement.

This approach allows scientists to test long-term theories about how galaxies are formed after the Big Bang, and it has provided some eye-opening insights. Due to activities from black holes, stellar explosions and gravitational pull, the formation of hot gases in galaxies should be the death penalty of a galaxy, preventing the formation of new stars. The researchers say that this is not the case in simulations that match real-world observations.

Behroozi explained: “When we return early and early in the universe, we expect dark matter to be denser, so natural gas will get hotter and hotter.” “This is bad for star formation, so we used to think that many of the early universes The galaxies should have stopped forming stars a long time ago. But we found the opposite: galaxies of a given size are more likely to form stars at a higher rate, contrary to expectations.”

All of this work requires some powerful computing power, and the researchers got the help of NASA and the resources of German scientists, combined with their own supercomputers at the university to achieve this goal. A total of 2,000 processors run simultaneously for three weeks to generate more than 8 million virtual universes.

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