Topic
Hypothesized form of matter that neither emits nor absorbs light but is inferred from its gravitational effects, thought to make up most of the universe's mass.
Simulations of the El Gordo collision, over two quadrillion solar masses, fit two-state self-interacting dark matter better than noninteracting dark matter. Phys.org's account calls the result a possible solution, not a definite one.
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Former NASA chief scientist Jim Green and Ed Belbruno say the Sun's gravitational frontier lies about 3.8 light-years out, roughly 241,000 AU. The proposal appeared in a magazine written for general readers, and Space's report quotes no one outside the pair.
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Astronomers writing in The Astrophysical Journal in June 2026 propose that a collision of two galaxies left DF2, DF4 and DF9 with little dark matter. An author says the pattern counts against gravity-only explanations, though the candidate particles stay open.
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IPAC researchers report that Webb data show galaxy cluster XLSSC 122, 10.4 billion light-years away, holds an unusually dense concentration of matter. Caltech IPAC's summary says that suggests some cosmic structures may have developed much faster than current models predict.
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LZ's September 1 report of one high-energy xenon recoil has drawn dozens of arXiv papers, with much of the interest on the higgsino. A confirmed higgsino would be supersymmetry's first discovery, though LZ says the event could still be a blip from known physics.
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Luis Anchordoqui's Lehman College team calculates that primordial black holes in a universe with a micron-wide hidden dimension would end up five-dimensional. The work links a proposed dark matter candidate to an extra dimension that has no more evidence behind it.
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H.E.S.S. searched 546 hours of Milky Way centre data for a single-energy gamma-ray line from dark matter and found no significant signal. Its upper limits now reach the annihilation rates the collaboration says matter for WIMPs, a leading dark matter candidate.
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Cambridge-led researchers plan to fly the suitcase-sized CosmoCube around the Moon and collect about 1,000 hours of Earth-shielded radio data over two years. It will listen for hydrogen's 21-centimetre signal from the roughly 150 million years before the first stars, an era no one has directly observed.
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A University of Washington team ran roughly 15,000 streams through four clump-free Milky Way analogues for five billion years and got the gaps and kinks usually read as subhalo signals. The host galaxy is now a control.
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Primordial helium-4, measured with new precision in September 2026, makes Big Bang nucleosynthesis a competitive probe again, a physicist argues. Helium depends on how fast the young universe expanded, and so on how many hot, light particles it held.
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Youngsub Yoon of Sejong University asked what dark halo an astronomer would infer in a universe with no dark matter. His answer, 170 solar masses per square parsec, falls inside the observed band of 90 to 220.
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A Copenhagen-led team reports in Nature a faint trail of tidally stripped stars inside the ultra-diffuse galaxy UGC9050-Dw1, where the mass it implies agrees with earlier estimates for the same galaxy.
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Physicists at HKU and Beijing Normal University derived lensing predictions straight from a three-dimensional wave simulation. On one well-studied quasar, the image positions came out closer to the data than the models they compared against.
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Aquarius IV is one of the faintest Milky Way satellites ever recorded, pulled out of Vera C. Rubin Observatory test data taken before the main survey began. The research note has not been peer reviewed.
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LZ's liquid xenon detector recorded a single burst of light on 1 September, with roughly a 1-in-200 chance it was background. Its energy alone is enough to make the simplest dark matter candidate a poor fit.
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Stefano Profumo ran twelve dark matter scenarios through the Barbieri-Giudice sensitivity test in Physical Review D. A popular particle model tied to a Higgs resonance came out among the most fine-tuned of the set.
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An INAF-led team searched the deepest optical images yet taken of the fields around NGC 5068, NGC 5084 and NGC 5087 by eye, logging 47 dwarf galaxy candidates that spectroscopy has still to confirm as satellites.
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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 Kyoto-led model says an axion signal should peak in Southeast Asia, but the decade of records came from Britain, and the several unexplained dark photon candidates it also turned up cannot be checked from one station.
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Each cloud holds about 3 million solar masses of hydrogen inside a halo of 3.7 billion, the gas fraction cold dark matter models predict for a halo that never made a star, and also what a tidal tail could imitate.
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