Project
Multi-fiber spectrograph on the Mayall Telescope at Kitt Peak measuring spectra of tens of millions of galaxies to map cosmic structure and dark energy.
Istanbul Technical University physicists found a branch of f(T) gravity where effective dark energy was negative until about 9.5 billion years ago. It offers a candidate mechanism for the sign-switching dark energy that earlier analyses found consistent with DESI data.
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Oxford-led astronomers using DESI found 546 bulgeless galaxies with feeding black holes sit on the same black hole-to-stellar mass relation as bulged ones. A bulge usually signals past mergers, so the result favours growth fed by bars and spiral arms, if that proxy holds.
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ASU-led astronomers stacked hundreds of jet galaxies and found hydrogen glowing along the jets for hundreds of thousands of light-years. The glow fits one explanation for why gas-rich galaxies stop making stars, though what was measured is ionized gas, not star formation.
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ASU and RRI astronomers found hydrogen glow concentrated along black hole jets after stacking the spectra of hundreds of galaxies. It places jet energy in the halo gas that feeds new stars, though any drop in star formation is still inferred.
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Star formation has fallen to under half its rate of 4.5 billion years ago, but a FAST and DESI measurement finds the atomic hydrogen reservoir down only about a third, which moves the bottleneck downstream.
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The ODIN survey turned up 150 protoclusters from the universe's first three billion years. 3D follow-up on two of them shows structures on track to outgrow the Coma Cluster without straining the current cosmic-web picture.
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A worldwide survey led from Waterloo and the Perimeter Institute records what working physicists believe about dark matter and quantum gravity, and the way its answer options were drawn shapes what those percentages can prove.
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The five-year survey covers about 75 percent of the sky and roughly 4 billion objects, and what shows it has landed as a product is the 1,800 papers already citing it.
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Yonsei's new paper says the June rebuttal defending cosmic acceleration flattened the age-luminosity slope by pooling too wide a redshift range, and that its own arithmetic cancels itself out.
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A Physical Review D paper argues cosmic acceleration is a residue of quantum uncertainty acting on geometry, which would turn two unsolved problems into one. Upcoming surveys are the test.
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A cross-correlation of 2,870 CHIME fast radio bursts with about six million DESI galaxies puts diffuse plasma far wider than feedback models allow. That makes the models mis-tuned, not merely fuzzy.
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