Cosmology
New model revives Einstein's idea for universe's origin
Scientists from Spain and Italy have proposed a model that replaces cosmic inflation with gravitational waves as the key force in the universe's early formation. Published in Physical Review Research, the study suggests gravity and quantum mechanics alone can explain the cosmos's structure. This approach draws on a century-old concept linked to Albert Einstein's work.
Scientists create laptop tool to simulate universe structure
Researchers at the University of Waterloo have developed Effort.jl, a new tool that allows scientists to simulate the universe's large-scale structure using just a laptop. This innovation reduces computation time from days on supercomputers to hours, enabling faster analysis of vast cosmic datasets. The tool emulates complex models like the Effective Field Theory of Large-Scale Structure (EFTofLSS).
Scientists uncover hidden energy mechanism in M87 black hole
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Astrophysicists at Goethe University Frankfurt have simulated how the supermassive black hole M87* powers its massive particle jet using a new numerical code. Their findings reveal that magnetic reconnection, alongside the traditional Blandford-Znajek mechanism, extracts rotational energy from the black hole. This discovery explains the immense jets that influence galaxy evolution.
Physicists measure trillion-degree heat in Big Bang plasma
Researchers at Rice University have captured the temperature profile of quark-gluon plasma, the ultra-hot matter from the universe's dawn. By analyzing electron-positron emissions from atomic collisions, they determined precise temperatures at different evolutionary stages. The findings, published in Nature Communications, refine understanding of early cosmic conditions.