New supercomputer simulation ‘Lumina’ provides glimpse into first 2 billion years of the universe

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Titled ‘Lumina’, the new simulation recreates an enigmatic phase of transformation by depicting how the first stars and black holes drove reionization. | World News

For all the scientific advancements made in the last few centuries, many parts of the universe, including stories of its origin and early days, remain a mystery for the human imagination. NASA’s James Webb Space Telescope is only one among many of the powerful observatories that have helped create models of what the earliest galaxies might have looked like. The latest supercomputed simulations are simply the latest addition to this bundle.

Given their credibility in filling many of our knowledge gaps, a team of international researchers has managed to successfully develop one of the most detailed models of the universe yet as per a recent study published in the scientific journal Monthly Notices of the Royal Astronomical Society.

Titled ‘Lumina’, the new simulation recreates a pivotal yet enigmatic phase of transformation by depicting how the first stars and black holes drove reionization. Soon after the big bang, ultraviolet radiation from these early light sources stripped electrons from hydrogen atoms, the most common element in space, allowing light to travel farther and changing how galaxies were formed.

Light's nature of taking ample time to travel through space has allowed powerful telescopes to capture galaxies as they were billions of years ago. This technical ability feeds the curiosity of astronomers eager to decipher how the universe came to be into its current form. Large models like Lumina fuel such curiosity by allowing astronomers to study long stretches of cosmic history on similarly large scales.

As per lead author Oliver Zier, a postdoctoral research fellow at the Institute for Theory and Computation at the Center for Astrophysics, Harvard & Smithsonian, in Cambridge, Massachusetts, the Lumina is capable of covering more than 100 times as much space as earlier simulations.

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“We have a cosmological volume where you can see this cosmic web, how galaxies…

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