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 E-Mail IMAGE: On the left is a simulated image in which intracluster light is visible as a diffuse haze between discrete peaks of brightness -- the galaxies. In observations, as seen in... view more  Credit: Left image: Jesse Golden-Marx; simulation by The IllustrisTNG. Right image: Dark Energy Survey and Yuanyuan Zhang A combination of observational data and sophisticated computer simulations have yielded advances in a field of astrophysics that has languished for half a century. The Dark Energy Survey, which is hosted by the U.S. Department of Energy's Fermi National Accelerator La...

DOE/Fermi National Accelerator Laboratory A combination of observational data and sophisticated computer simulations have yielded advances in a field of astrophysics that has languished for half a century. The Dark Energy Survey, which is hosted by the U.S. Department of Energy's Fermi National Accelerator Laboratory, has published a burst of new results on what's called intracluster light, or ICL, a faint type of light found inside galaxy clusters. The first burst of new, precision ICL measurements appeared in a paper published in The Astrophysical Journal in April 2019. Another appeared mor...

The Dark Energy Survey, a global collaboration including researchers at the University of Wisconsin–Madison, has released DR2, the second data release in the survey’s seven-year history. DR2 was the topic of sessions at the 237th Meeting of the American Astronomical Society, which was held virtually January 10-15. The second data release from the Dark Energy Survey, or DES, is the culmination of over a half-decade of astronomical data collection and analysis with the ultimate goal of understanding the accelerating expansion of the universe and the phenomenon of dark energy, which is thou...

 E-Mail IMAGE: A randomly selected 3,000-year segment of the physics-based simulated catalog of earthquakes in California, created on Frontera. view more  Credit: Kevin Milner, University of Southern California Massive earthquakes are, fortunately, rare events. But that scarcity of information blinds us in some ways to their risks, especially when it comes to determining the risk for a specific location or structure. "We haven't observed most of the possible events that could cause large damage," explained Kevin Milner, a computer scientist and seismology researcher at the Southern...

Supercomputers Simulate 800,000 Years of California Earthquakes to Pinpoint Risks Massive earthquakes are rare events—and the scarcity of information about them can blind us to their risks, especially when it comes to determining the danger to a specific location or structure. Scientists are now working to improve the calculations of danger by combining maps and histories of known faults with the use of supercomputers to simulate potential shaking deep into the future in California. The method is described in an article just published in the Bulletin of the Seismological Society of America...