Articles tagged with Dark Matter
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Researchers used DNA barcoding to identify 31,800 insect samples from 37 habitats in Sweden, discovering 175 new species of scuttle flies. The study provides insights into the diversity and distribution of these species, which are influenced by climate factors and habitat changes.
A recent study suggests that the observation of antihelium nuclei in cosmic rays may be consistent with the existence of WIMP particles, which could make up dark matter. The detection of two distinct isotopes, antihelium-3 and -4, is particularly intriguing as heavier nuclei are unlikely to be produced through natural processes.
A new study identifies regions where gravity dominates, such as the Sloan Great Wall and Shapley Supercluster, suggesting that our Milky Way likely resides in the larger Shapley basin. The research provides an unprecedented look into the gravitational landscape of the local Universe.
The SAGA Survey has found that the Milky Way Galaxy appears to be an outlier in terms of its satellite galaxies, having acquired only two large satellites recently compared to other systems. The survey also explores the mechanisms that would stop star formation in these small galaxies, finding that environmental factors play a role.
A newly discovered cluster-scale strong gravitational lens, the Carousel Lens, enables researchers to study cosmology and the properties of dark matter and dark energy. The unique alignment of seven background galaxies forms concentric circular patterns around a foreground galaxy cluster.
Researchers suggest that if most dark matter is composed of microscopic primordial black holes, they should pass through the solar system at least once per decade, introducing a wobble into Mars' orbit. This detection could lend support to the idea that primordial black holes are a primary source of dark matter.
A new study proposes that early dark energy could explain the formation of numerous bright galaxies in the early universe, resolving the 'Hubble tension' puzzle. The team modeled galaxy formation with a brief appearance of early dark energy, finding it fits observations and solves both puzzles.
A deep-learning algorithm developed by astronomer David Harvey can untangle the complex signals of self-interacting dark matter and AGN feedback in galaxy cluster images. The Inception model achieved an accuracy of 80% under ideal conditions, showcasing its potential for analyzing vast amounts of space data.
Researchers found that dark matter radiation could heat hydrogen gas long enough for gravity to condense it into clouds big and dense enough to turn into supermassive black holes. This process bypasses the need for stellar burning, accretion, and mergers, which typically take billions of years.
Researchers at the Flatiron Institute and colleagues used AI-powered approach, SimBIG, to estimate five cosmological parameters with precision. The method significantly improved previous results, yielding less than half the uncertainty and closely agreeing with other estimates based on observations.
The LZ experiment has narrowed down possibilities for weakly interacting massive particles (WIMPs), a leading candidate for dark matter. The new results explore weaker interactions than ever searched before and limit what WIMPs could be, finding no evidence above a mass of 9 GeV/c².
An international team of astronomers has disproven a 'conspiracy' that stars and dark matter interact in inexplicable ways. By using advanced modeling techniques, they found that the similarity in galaxy density is due to how astronomers measured and modeled galaxies, rather than an actual interaction between stars and dark matter.
A new study published in Physical Review Letters suggests that nanohertz gravitational waves may not originate from supercool first-order phase transitions. Researchers found that such transitions would struggle to complete, shifting the frequency of the waves away from nanohertz frequencies.
A new study published in the Astrophysical Journal has found that galaxies in denser environments are up to 25% larger than isolated galaxies. Researchers used a machine learning tool to analyze millions of galaxies and found a clear trend: galaxies with more neighbors are also on average larger.
A new AI-powered image recognition technique could help scientists detect dark matter at the LHC by flagging fleeting tracks before collisions occur. The technique, developed by Ashutosh Kotwal and his team, processes images in under 250 nanoseconds and weeds out uninteresting data points.
Astronomers have observed the decoupling of dark and normal matter velocities in a massive galaxy cluster collision. The dark matter accelerated ahead of normal matter due to gravity and electromagnetism interactions, offering a unique vantage point for studying this phenomenon.
Researchers used hydrogen to track dark matter's presence in the universe, revealing a tension between observations and theoretical predictions. The findings suggest that an unknown particle or new physics may be responsible for this discrepancy.
Researchers found that pairs of supermassive black holes can merge due to previously overlooked behavior of dark matter particles, proposing a solution to the longstanding final parsec problem. This discovery provides insight into the nature of dark matter and its interaction with supermassive black holes.
Researchers found deviations in pulse arrival times that indicate unseen concentrations of mass, which could be dark matter objects. The study improves pulsar timing data sample, shedding new light on dark matter distribution in the Milky Way.
A team of astronomers used NASA's Hubble Space Telescope to create the most accurate three-dimensional understanding of stars' movements within the Draco dwarf galaxy. This allowed them to build a more precise model of dark matter distribution, which aligns with cosmological models and suggests a cusp-like structure.
Researchers propose that simple forms of ultra-light scalar field matter could generate detectable gravitational wave backgrounds soon after the Big Bang. This discovery could shed light on dark matter and its role in the universe's mass, offering a new avenue for fundamental physics research.
A research team used the "motion picture" method to measure the precession rate of the Milky Way's disk warp, revealing a slightly oblate dark matter halo with a flattening ratio between 0.84 and 0.96. The study found that the current dark matter halo exhibits a retrograde precession direction at a rate of 2 km/s/kpc.
Researchers at Lancaster University and others are building the most sensitive dark matter detectors using quantum technologies. They aim to detect dark matter particles weighing between 0.01 to a few hydrogen atoms, which could reveal the mass and interactions of these mysterious particles.
A team of scientists from the University of Warsaw detected a population of massive black holes, which could comprise at most a few percent of dark matter. The findings were published in Nature and the Astrophysical Journal Supplement Series.
Scientists at Case Western Reserve University have discovered that the rotation curves of galaxies remain flat for millions of light years, defying expectations and challenging traditional understanding of cosmology. This finding suggests that dark matter may not exist or that alternative gravity theories could explain this phenomenon.
Researchers create a 3D printed vacuum system to trap dark matter, using ultra-cold lithium atoms to analyze the effects of domain walls. The team expects results within a year and believes this study will be an important step forward in understanding dark energy and dark matter.
A satellite galaxy of the Milky Way, Crater 2, has been studied by a UC Riverside-led team. They offer an explanation for its unusual properties using the self-interacting dark matter (SIDM) theory.
Researchers suggest microscopic, ultradense black holes formed in first quintillionth of a second after Big Bang may have produced smaller, super-charged black holes with unprecedented nuclear charge. These tiny, 'super-charged' black holes could have influenced atomic nucleus formation and detection.
Researchers used numerical simulations to analyze the behavior of dark matter in the giant galaxy cluster El Gordo. The study found that the physical separation between dark matter and other mass components can be explained using the Self-Interacting Dark Matter (SIDM) model.
Researchers propose a novel approach to correct the leading model of primordial black hole (PBH) formation, aligning with cosmic microwave background observations. This could imply fewer PBHs than expected, potentially affecting the dark matter theory and gravitational wave events.
The study uses computer simulations to test two models of the universe, finding that features observed in real galaxies can be explained by both models. However, the team also found that such features only appear in their simulations when there is both dark matter and normal matter present.
A new study has sorted through models attempting to solve the cosmological tension, a discrepancy between two ways of calculating the universe's expansion. Three models that were previously viable solutions were excluded by the new data, while others reduced the tension but not solved it.
Researchers used thermodynamics to describe the expansion of the Universe, finding that adiabatic and anisotropic effects are accompanied by cooling due to the barocaloric effect. The study proposes a novel way to investigate anisotropic effects associated with the expansion of the Universe.
A massive ancient galaxy, JWST-ER1g, has been found to have a high dark matter density, puzzling physicists. Researchers offer an explanation that suggests a mechanism compressing the dark matter halo could be responsible for the high density.
Physicists calculated that neutron stars can heat up quickly due to energy transfer from dark matter particles, providing a potential way to detect dark matter. This process could reveal the nature of dark matter and its interactions with regular matter.
The 3,200-megapixel LSST Camera will help researchers better understand dark matter and dark energy by observing the night sky in unprecedented detail. The camera's high resolution will allow it to resolve a golf ball from 15 miles away, providing valuable insights into the universe.
The BREAD experiment has released its first results in the search for dark matter, demonstrating a novel approach that may speed up the search. The study showed high sensitivity in a specific frequency range, setting constraints on where dark matter might be found.
Researchers at SLAC National Accelerator Laboratory propose detecting thermalized dark matter, which builds up on Earth's surface, using quantum sensors. The study suggests that superconducting quantum devices could be redesigned to detect low-energy galactic dark matter particles.
A Rice University team, led by Wei Li, has received a $15.5 million grant to develop an ultra-fast silicon timing detector for the CMS experiment at the LHC. This technology will enable breakthrough science in heavy ion collisions and provide insights into the strong nuclear force.
A Clemson astrophysicist's research offers the most stringent constraints yet on dark matter's fundamental nature. The study reveals a small hint of a signal that could be confirmed in the next decade if real.
Astronomers have charted the largest-ever volume of the universe with a new map of active supermassive black holes, logging 1.3 million quasars in space and time. This map allows scientists to study dark matter and the universe's expansion by comparing distant quasars and their host galaxies.
A new study by University of Ottawa physicist Rajendra Gupta challenges the existence of dark matter in the universe. Using the covarying coupling constants and tired light theories, Gupta's research finds that the universe does not require dark matter to exist.
Researchers have discovered unique electromagnetic signals in the debris of a neutron star merger, which could provide new constraints on axion-like particles and their potential role in dark matter. The findings were made using data from NASA's Fermi-LAT gamma-ray telescope.
Astronomers have discovered a massive, wave-shaped structure in the Milky Way, which is oscillating through space-time. The Radcliffe Wave is approximately 9,000 light years long and moves like a traveling wave, with star clusters along its path moving up and down.
Researchers used CALIFA survey data to study the mass of stars and their rotation, finding that dark matter affects galaxy evolution. Galaxies with equal star masses behave differently depending on their halo mass, revealing a connection between dark matter and stellar properties.
A team of astrophysicists used simulations to track galaxy formation near the Big Bang, including interactions between gas and dark matter. The results show that tiny, bright galaxies were formed more quickly than expected, challenging current theories about dark matter.
A team of MIT physicists analyzed Gaia and APOGEE data to find stars farther out in the galactic disk are rotating more slowly than expected. This flat rotation curve indicates a lower mass galactic core, potentially containing less dark matter than previously estimated.
The Paarl Africa Underground Laboratory (PAUL) will be a game-changer for universities in South Africa and its partners, offering benefits through new jobs and research opportunities. The laboratory will enable scientists to study dark matter and neutrinos in a radiation-free environment.
A new study proposes that dark matter mini-halos scattered throughout the cosmos could serve as probes for primordial magnetic fields. The researchers suggest that if these fields are indeed primordial, they could cause an increase in dark matter density perturbations on small scales.
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.
Researchers investigate whether dark matter particles are produced inside a jet of standard model particles. Their new detector signature, semi-visible jets, opens up new directions into looking for Dark Matter.
A new recovery system designed by University of Sydney scientists allowed the retrieval of gigabytes of information after a NASA telescope was damaged in landing. The system, which includes parachutes and SD cards, proved essential to the mission's success and has been tested for use in future science missions.
Researchers found a barred spiral galaxy similar to the Milky Way at a redshift of 3, challenging previous understanding of galaxy evolution. The discovery suggests that galaxies matured and became ordered much faster than thought, with implications for theories of galaxy formation and evolution.
A new computer simulation of the early universe aligns with JWST observations, showing no discrepancy with theoretical expectations. The 'Renaissance simulations' track dark matter clumps and galaxy formation, consistent with models that dictate cosmic physics.
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.
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.
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.
Researchers at PNNL have developed ultra-low radiation cables to minimize interference from cosmic radiation, increasing sensitivity and flexibility in detector design. These cables can help solve key mysteries of the universe, including dark matter and neutrino properties.
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.
Researchers from Queen's University have identified two potential polar ring galaxies using data from the CSIRO's ASKAP radio telescope. The discovery suggests that these rare clusters might be more common than previously believed, with implications for our understanding of galaxy evolution and dark matter research.