New research has combined cosmological data from two major surveys of the universe's evolutionary history and found hints that it may be less clumpy at certain points than previously thought. Their findings suggest that the universe may have become more complex with advancing age.
New research has combined cosmological data from two major surveys of the universe's evolutionary history and found hints that it may be less clumpy at certain points than previously thought. Their findings suggest that the universe may have become more complex with advancing age.
"Our work cross-correlated two types of datasets from complementary, but very distinct, surveys," says Madhavacheril,"and what we found was that for the most part, the story of structure formation is remarkably consistent with the predictions from Einstein's gravity. We did see a hint for a small discrepancy in the amount of expected clumpiness in recent epochs, around four billion years ago, which could be interesting to pursue.
DESI's data, on the other hand, provides a more recent record of the cosmos. Based in the Kitt Peak National Observatory in Arizona and operated by the Lawrence Berkeley National Laboratory, DESI is mapping the universe's three-dimensional structure by studying the distribution of millions of galaxies, particularly luminous red galaxies . These galaxies act as cosmic landmarks, making it possible for scientists to trace how matter has spread out over billions of years.
In doing so they noticed a small discrepancy: the clumpiness, or density fluctuations, expected at later epochs didn't quite match predictions.
Moving forward, the team will work with more powerful telescopes, like the upcoming Simons Observatory, which will refine these measurements with higher precision, enabling a clearer view of cosmic structures.Joshua Kim, Noah Sailer, Mathew S. Madhavacheril, Simone Ferraro, Irene Abril-Cabezas, Jessica Nicole Aguilar, Steven Ahlen, J. Richard Bond, David Brooks, Etienne Burtin, Erminia Calabrese, Shi-Fan Chen, Steve K.
Astrophysics Big Bang Cosmic Rays Astronomy Dark Matter Galaxies Space Telescopes
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