Virtual Universes Reveal the Cosmos with Greater Precision ⚡ экспресс
Original: "Field-level multi-tracers simulation-based inference of cosmological parameters from 3D maps"
A new approach comparing real and virtual maps of the cosmos enables more precise measurement of the Universe's elusive properties.
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To find out a soup recipe, you don't have to ask the chef—you can just experiment in the kitchen. Astronomers do the same: they run thousands of computer universes, tweaking the amount of dark matter and other parameters until the map matches reality. This trick yielded 2–7 times more precise measurements, and switching to 3D maps boosted the effect another threefold.
🎯 The signal from neutral hydrogen comes at a wavelength of 21 centimeters. It's so faint that a working TV could drown it out, but astronomers capture it with sensitive antennas.
🎬 In the iconic Matrix trilogy, reality turned out to be a computer simulation. In this work, scientists, on the contrary, use simulations to uncover the true nature of our world.