The world's second-fastest supercomputer has created the most detailed cosmological simulation, featuring the 'astrophysical kitchen sink.'
These images are a small sample from the Frontier supercomputer simulations. They reveal the evolution of the expanding universe in a region containing a massive cluster of galaxies from billions of years ago to present day . Red areas show hotter gasses, where temperatures reach 100 million Kelvin or more. The panel on the right is a zoom-in, where star tracer particles track the formation of galaxies and their movement over time. Credit: Argonne National Laboratory, U.
The new Frontier simulation is record-breaking and is now the largest simulation of the Universe ever conducted. Its exascale computing allows it to simulate a level of detail that was unreachable prior to its implementation. Exascale is so advanced that it’s difficult to fully exploit its capabilities without new programming paradigms.
“So, if we want to know what the universe is up to, we need to simulate both of these things: gravity as well as all the other physics including hot gas, and the formation of stars, black holes and galaxies,” he said. “The astrophysical ‘kitchen sink’ so to speak. These simulations are what we call cosmological hydrodynamics simulations.”
“For example, if we were to simulate a large chunk of the universe surveyed by one of the big telescopes such as the Rubin Observatory in Chile, you’re talking about looking at huge chunks of time — billions of years of expansion,” Habib said. “Until recently, we couldn’t even imagine doing such a large simulation like that except in the gravity-only approximation.”
Frontier simulates more than just the Universe. In June, researchers working with it achieved another milestone. They simulated a system of 466 billion atoms in a simulation of water. That was the largest system ever modeled and more than 400 times larger than its closest competition. Since water is a primary component of cells, Frontier is paving the way for an eventual simulation of a living cell.
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