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Search results for “Dark Matter”

1,000+ results for "Dark Matter"

Final supernova results from Dark Energy Survey offer unique insights into the expansion of the universe

The Dark Energy Survey has released unprecedented results on the mysteries of dark energy and the expansion of the universe. The study placed the strongest constraints on the expansion rate of the universe ever obtained, consistent with the standard cosmological model but not definitive enough to rule out a more complex model.

SourceDOE/Fermi National Accelerator Laboratory·JournalThe Astrophysical Journal·TypeData/statistical analysis·DateJan 8, 2024

New dark matter theory explains two puzzles in astrophysics

A new theory, self-interacting dark matter (SIDM), proposes that dark matter particles interact through a dark force, explaining high-density halos and low-density halos of ultra-diffuse galaxies. SIDM simulates cosmic structure formation with strong dark matter self-interactions, diversifying halo density in central regions.

SourceUniversity of California - Riverside·JournalThe Astrophysical Journal·TypeComputational simulation/modeling·DateDec 6, 2023

Researchers find gravitational lensing has significant effect on cosmic birefringence

New study finds that neglecting gravitational lensing in CMB polarization analysis leads to statistically rejected theories and biased model parameters. Researchers develop tool for correcting gravitational lensing effects, paving way for future missions to reveal nature of dark matter and dark energy.

Biggest ever supercomputer simulation to investigate Universe’s evolution

Researchers have carried out the largest ever computer simulations to investigate the Universe's evolution, taking into account ordinary matter and dark energy. The FLAMINGO simulations provide a detailed picture of virtual galaxies and galaxy clusters, allowing for comparisons with observations from new high-powered telescopes.

SourceDurham University·JournalMonthly Notices of the Royal Astronomical Society·TypeComputational simulation/modeling·DateOct 24, 2023

Finding explanation for Milky Way’s warp

Astronomers at Harvard University have discovered a tilted dark matter halo, explaining the Milky Way's warp and flare. The team used models to calculate star orbits within a warped, oblong dark matter halo, matching existing observations of a distorted galaxy.

SourceHarvard University·JournalNature Astronomy·TypeData/statistical analysis·DateOct 10, 2023

Pulsars may make dark matter glow

Scientists propose that pulsars could detect dark matter by observing a subtle additional glow. If axions are produced in strong electromagnetic fields around pulsars, they could convert into observable light.

SourceUniversiteit van Amsterdam·JournalPhysical Review Letters·TypeComputational simulation/modeling·DateOct 6, 2023

New clues to the nature of elusive dark matter

Researchers at the University of Adelaide have uncovered new clues in the quest for understanding dark matter, a mysterious substance making up 84% of the universe's mass. The study suggests that the dark photon hypothesis is preferred over the standard model hypothesis, providing evidence for a potential particle discovery.

SourceUniversity of Adelaide·JournalJournal of High Energy Physics·DateSep 18, 2023

Dark matter halos measured around ancient quasars

A team of researchers from the University of Tokyo has measured dark matter halo masses around ancient quasars, finding a consistent mass of about 10 trillion times the mass of our sun. This discovery suggests a characteristic DMH mass that activates quasars regardless of time period.

SourceUniversity of Tokyo·JournalThe Astrophysical Journal·TypeObservational study·DateSep 11, 2023

Three out of every ten meals ordered from the main food delivery app in Brazil come from dark kitchens

A study in Brazil found that 35.4% of restaurants on a popular food delivery app are 'dark kitchens' with no direct contact with consumers, serving mainly Brazilian food at lower costs. The research highlights health and safety issues, consumer perceptions, and the need for legal viability to ensure sanitary inspection.

SourceFundação de Amparo à Pesquisa do Estado de São Paulo·JournalFood Research International·DateAug 3, 2023

Dark SRF experiment at Fermilab demonstrates ultra-sensitivity for dark photon searches

Scientists trapped ordinary photons in superconducting radio frequency cavities to search for dark photon transitions, demonstrating unprecedented sensitivity and the world's best constraint on dark photon existence. The experiment used SRF cavities with high efficiency and covered new parameter regions for dark photon mass.

SourceDOE/Fermi National Accelerator Laboratory·JournalPhysical Review Letters·DateJul 21, 2023

Search for dark matter at Jülich

Researchers at Forschungszentrum Jülich's Nuclear Physics Institute have searched for dark matter using a specialized particle accelerator and detected axionlike particles. The experiment utilized polarized beams to measure the electric dipole moments of charged particles, revealing a promising method in the search for dark matter.

SourceForschungszentrum Juelich·JournalPhysical Review X·TypeExperimental study·DateJul 13, 2023

Exploring dark matter and the first bright galaxies simultaneously: 21-cm forest probe may unlock secrets of early universe

A joint research team from Northeastern University and the National Astronomical Observatories of the Chinese Academy of Sciences has proposed a novel 21-cm forest probe to shed light on dark matter and the early formation of galaxies simultaneously. By measuring the one-dimensional power spectrum of the 21-cm forest, scientists can di...

SourceChinese Academy of Sciences Headquarters·JournalNature Astronomy·DateJul 11, 2023

Astronomers discover new link between dark matter and clumpiness of the universe

Researchers at the University of Toronto have made a breakthrough in understanding dark matter and its impact on the universe's large-scale structure. By analyzing cosmic microwave background data and galaxy clustering patterns, they suggest that ultra-light axion particles could account for the observed lack of clumpiness.

SourceUniversity of Toronto·JournalJournal of Cosmology and Astroparticle Physics·TypeData/statistical analysis·DateJun 14, 2023

Dark order in the universe

A team of scientists from Kyoto University has confirmed that galaxy alignments can be a powerful probe for dark matter and dark energy. The analysis of 1.2 million galaxy observations verified general theory of relativity at vast spatial scales, providing strong evidence for gravity's role in shaping the universe.

SourceKyoto University·JournalThe Astrophysical Journal Letters·TypeData/statistical analysis·DateApr 13, 2023

Do all fungi matter? Yes, new study argues

A recent study found large groups of fungi that don't form fruiting bodies and can't be grown in labs, highlighting their ecological importance. The authors suggest modifying nomenclature rules to describe these 'dark fungi', which could prove to be the dominant lifestyle in the fungal kingdom.

SourcePensoft Publishers·JournalMycoKeys·DateApr 10, 2023

Exploiting dark autoionizing states for enhancing the extreme ultraviolet laser power

Researchers develop unique method to enhance extreme ultraviolet laser power by exploiting dark-autoionizing states, increasing conversion efficiency by over ten times. This breakthrough enables studying ultrafast dynamics of dark autoionizing states at the femtosecond timescale, with potential applications in quantum technologies.

SourceInstitut national de la recherche scientifique - INRS·JournalPhysical Review Letters·DateMar 30, 2023

Thinking big and dark by starting small and light

Scientists at Kyoto University have established a new experimental method to examine ultra-light dark matter, addressing the challenging problem of detection. By applying millimeter-wave sensing technology in cryogenic conditions, they were able to detect dark photons with a mass range previously unexplored.

SourceKyoto University·JournalPhysical Review Letters·TypeExperimental study·DateMar 20, 2023

Dark current modeling of thick perovskite X-ray detectors

Researchers developed a dark current model for thick perovskite X-ray detectors, finding that thermionic-emission and generation-recombination currents are key contributors. The study reveals the importance of suppressing generation-recombination current due to hetero-band mismatch and interface defects.

SourceHigher Education Press·JournalFrontiers of Optoelectronics·TypeExperimental study·DateMar 14, 2023

A new model for dark matter

Researchers propose HYPER model of dark matter with a phase transition that boosts its interaction with normal matter, potentially making it detectable. The new diversity in the dark matter sector highlights an alternative to WIMPs, covering almost the full parameter range of planned experiments.

SourceJohannes Gutenberg Universitaet Mainz·JournalPhysical Review Letters·TypeComputational simulation/modeling·DateJan 24, 2023

A new model for dark matter

Researchers have proposed a new model for dark matter, the HYPER model, which explains how its interaction with normal matter changes abruptly after the formation of dark matter in the early universe. This phase transition could make dark matter detectable and explain its abundance.

SourceUniversity of Michigan·JournalPhysical Review Letters·DateJan 23, 2023