Articles tagged with Dark Matter
Dr. Christopher Tunnell, a computational astroparticle physicist at Rice University, has been awarded a National Science Foundation (NSF) CAREER Award to further his research on dark matter and other phenomena. The award will support a combined physics and computer science effort to detect rare particles and understand the universe.
A new general relativistic framework for models of galactic rotation curves alleviates the need for dark matter by incorporating gravitomagnetic fields. The theory proposes that these fields can explain the effects of dark matter, suggesting a possible elimination of this form of matter.
Researchers propose a new type of dark energy that could explain conflicting measurements of the universe's expansion rate. The theory suggests that dark energy underwent a phase transition triggered by the universe's expansion, resulting in a more consistent explanation for observed phenomena.
A new theoretical study suggests that supermassive black holes could form directly from dark matter in high-density regions, contradicting current understanding of their formation. This proposal has key implications for cosmology and the early Universe, potentially explaining how supermassive black holes grew so quickly.
Researchers at the University of Granada and Johannes Gutenberg University Mainz have proposed a new heavy particle with properties similar to the Higgs boson. This particle is expected to play a fundamental role in explaining the origin of dark matter, which could solve two major problems in theories of particle physics.
A team of researchers used stellar kinematics to study dark matter in ultra-faint dwarf galaxies, revealing a dense core and limited scattering. This challenges existing theories on self-interacting dark matter, suggesting that supernova explosions may be responsible for less dense distributions.
Researchers use innovative technique called 'quantum squeezing' to dramatically speed up the search for dark matter in the lab. The team hopes to find axion particles, which are likely billions of times smaller than electrons and could explain the existence of dark matter.
Researchers found that some dwarf galaxies may appear dark-matter free due to extreme tidal mass loss, challenging the LCDM cosmological model. Simulations suggest a combined solution to both the structure and low dark matter content of these ultradiffuse galaxies.
Researchers have developed a new method to detect axions, which are thought to make up 26% of the universe's energy content. The BASE collaboration used ultra-sensitive detectors in Penning trap experiments to set new limits on axion-photon coupling.
Researchers propose a new theory that predicts the existence of a new force between ordinary and dark matter, making dark matter accessible to forthcoming experiments. The 5-dimensional field equations also predict the existence of a heavy particle with similar properties as the Higgs boson but a much heavier mass.
Astrophysicists at MIT have discovered an extended dark matter halo around Tucana II, a primitive ultrafaint dwarf galaxy. The halo is estimated to be three to five times more massive than previously thought, implying that the first galaxies in the universe were likely larger and more massive.
A combination of observational data and computer simulations have yielded advances in understanding intracluster light, a faint type of light found inside galaxy clusters. The results suggest that ICL might provide a new way to measure dark matter.
The Last Journey simulation, performed on Argonne's supercomputer Mira, studied the distribution of mass across the universe over time. The team used a workflow combining HACC and CosmoTools to analyze and record relevant information during the simulation.
Researchers at the University of Sussex calculated a tighter mass range for Dark Matter particles, showing it cannot be 'ultra-light' or 'super-heavy', unless an unknown force also acts upon it. The new range is between 10^-3 eV and 107 eV, significantly narrowing the previously theorized spectrum.
Researchers detected high-energy X-ray emissions around a group of neutron stars, known as the Magnificent 7, which could be attributed to theorized axions or dark matter. The study uses supercomputing and data analysis to predict axion production in neutron star cores.
Researchers measured pulsar accelerations to clock star motions, revealing tiny accelerations at a few centimeters per second. This opens a new window into galactic dynamics and provides clues in the search for dark matter.
Researchers at Kavli IPMU propose a novel scenario for primordial black hole formation, suggesting they could account for all or part of dark matter. They also suggest that PBHs could be responsible for some gravitational wave signals and seed supermassive black holes found in the center of our Galaxy.
Researchers use radio telescopes to search for dark matter near neutron stars, with the goal of detecting the elusive axion particle. The study imposes strong limits on axion particles with masses between 5-11 micro electron-volt, a crucial step towards confirming the theory.
A team of international scientists detected an external field effect in over 150 galaxies, challenging the dark matter hypothesis and supporting modified Newtonian dynamics (MOND). The findings suggest that MOND's gravity at low accelerations is stronger than predicted by Newtonian understanding.
A novel multiple-cell cavity design, dubbed 'pizza cavity,' has been developed to address the challenges of searching for axion dark matter in high-frequency regions. The new design improves detection efficiency and allows for faster scanning of frequency ranges compared to conventional methods.
A team of French scientists has measured the fine-structure constant with unprecedented precision, achieving an accuracy of 11 significant digits. The new value opens up new possibilities for testing the Standard Model's theoretical predictions and shedding light on fundamental questions such as dark matter.
A recent study reveals that the Milky Way galaxy is being warped and twisted by the gravitational force of the Large Magellanic Cloud, a smaller galaxy that crossed its boundary 700 million years ago. The effects are still being witnessed today and should force a revision of how our galaxy evolved.
Researchers used a state-of-the-art atomic clock to narrow the search for elusive dark matter, setting new limits on ultralight dark matter's coupling strength. The study established constraints on the floor of normal fluctuations, providing sensitivity to cosmological models of dark matter and accepted physics theories.
Scientists calculate that rare signals from dark matter can be detected by GPS atomic clocks and magnetometers, adding to multi-messenger astronomy
Astronomers have developed a new method to detect dark matter haloes surrounding galaxies, allowing for more precise measurements of the invisible mass. By analyzing the gravitational lensing effect on galaxy rotation, researchers can infer the amount of dark matter required to explain observed distortions.
Researchers at NIST have proposed a novel method to find dark matter by detecting its gravitational interaction with visible matter. A billion millimeter-sized pendulums would act as sensors, sensitive to particles ranging from 1/5,000 of a milligram to a few milligrams, covering the so-called Planck mass.
Astronomers find galaxy Dragonfly 44 has normal amount of dark matter, contrary to earlier claims. The team discovered only 20 globular clusters, reducing the amount of dark matter, and confirming that the galaxy is not unique or anomalous.
A University of Colorado Boulder astrophysicist is searching the light coming from a distant magnetar, PSR J1745-2900, for signs of dark matter. The scientist hopes to detect the faint signals of an axion particle transforming into light.
A team led by UC Riverside scientists determines that matter makes up 31% of the total amount of matter and energy in the universe. The researchers used a novel method to measure the mass of galaxy clusters, finding a best combined value of 31.5±1.3%.
Physicists develop new theory to explain neutrino properties, solving lepton conservation issues and potential dark matter answers. The research provides predictions testable by the Large Hadron Collider.
A new study by Yale astrophysicist Priyamvada Natarajan and colleagues found that the smaller dollops of dark matter associated with cluster galaxies are significantly more concentrated than predicted by theorists. The discovery implies a possible gap in scientists' understanding of dark matter.
Researchers found far more small-scale dark matter gravitational lenses in galaxy clusters than predicted by standard cosmology. The discovery suggests either an issue with simulation methods or incorrect assumptions about dark matter's nature.
Astronomers have discovered a discrepancy between theoretical models and Hubble observations of galaxy clusters, suggesting a potential gap in our understanding of dark matter. The study used unprecedentedly detailed observations to map the distribution of dark matter on small scales.
Astronomers used NASA/ESA Hubble Space Telescope and VLT to map dark matter distribution in galaxy clusters. The data showed unexpected lensing effects 10 times stronger than expected, hinting at a missing ingredient in current theories.
A study led by UC Riverside physicist Hai-Bo Yu suggests that the self-interacting dark matter theory explains why two galaxies contain less dark matter than expected. The researchers used sophisticated simulations to show that tidal stripping of the satellite galaxies' mass can occur, leading to a decrease in dark matter content.
The study found that small dark matter haloes have a similar internal structure to larger ones, with smaller clumps orbiting in their outer regions. This could help identify these small objects individually or collectively through future gamma-ray observatories.
A recent study published in Nature has zoomed in on dark matter haloes of varying masses, revealing a surprising similarity in their internal structure. The research team used supercomputers to simulate the evolution of the universe and found that even small haloes have dense centers and spread-out outer regions.
A multidisciplinary research team found that low-level ionizing radiation degrades superconducting qubit performance. To maintain coherence and achieve practical quantum computing, radiation shielding will be necessary. Researchers emphasize the need to exclude radiation-emitting materials and consider underground experimental setups.
Researchers have eliminated dark matter candidates as the origin of excess gamma rays detected in the Milky Way's galaxy center through extensive modeling exercises. The study puts strongest constraints yet on dark matter properties, ruling out weakly interacting massive particles up to very high-mass particles.
Researchers at Johannes Gutenberg University Mainz developed a new zero-to-ultralow-field NMR spectroscopy method to analyze chemical reactions in metal containers. This technique overcomes the limitations of high-field NMR, allowing for the observation of complex reactions and catalysis mechanisms.
Physicist Hai-Bo Yu at UC Riverside has been awarded a three-year grant to study Self-Interacting Dark Matter, a new theory that posits dark matter particles have strong self-interactions. The project aims to improve our understanding of dark matter and its role in galaxy distributions.
Researchers propose a kinetic misalignment scenario that strengthens the axion/dark matter equivalence. This novel concept answers key questions and provides new avenues for detection efforts.
The XENON1T experiment has observed a surprising excess of 53 events over expected backgrounds, sparking theories on potential sources such as tritium, axions, or altered neutrino properties. The solar axion hypothesis holds the most significance at 3.5 sigma, while other explanations remain consistent with data.
Researchers at Caltech propose a new approach to detecting dark matter using lighter-weight particles that can interact with magnons, excited electron spins. They suggest cooling equipment and moving it underground to detect these interactions.
A recent study found that cell phones and shoes harbor distinct communities of microbes, with shoes displaying greater diversity. The research also uncovered a substantial proportion of 'microbial dark matter' groups, previously unexplored in lab settings.
JGU is welcoming renowned physicist Gilad Perez to Mainz to tackle the mystery of dark matter. His research aims to identify the nature of dark matter and develop innovative detection methods in the laboratory.
The HHU physicists conducted a precision experiment to measure the electrical force between protons and deuterons using HD+ ions. They found no evidence of an interaction with dark matter, pushing down the upper limit of such interactions more than 20-fold.
Researchers propose refocusing dark matter detector efforts to seek out newly suggested types of dark matter signals that may have been overlooked. This includes absorption-related processes and energy signatures in the MeV range, which could be more common than previously detected signals.
Researchers at ICFO have successfully searched for axions, hypothetical particles thought to make up 80% of the universe's mass, using a new technique involving Bose-Einstein condensates. The study confirms the ability to detect short-range spin-dependent forces with much shorter ranges than previous experiments.
Researchers from KIT participate in the Belle II accelerator experiment to enhance understanding of dark matter in the universe. They have now limited mass and coupling strengths of the Z' boson with previously unattainable accuracy using initial data collected during the startup phase.
Researchers used satellite galaxies Draco and Fornax to test the self-interacting dark matter (SIDM) model, which explains diverse dark matter distributions. SIDM produces novel signatures in subhalos that differ from the prevailing Cold Dark Matter theory.
Physicists Rees McNally and Tanya Zelevinsky have proposed two novel methods of searching for dark matter by measuring tiny perturbations in fundamental constants. These methods involve using gravity sensors and LIGO gravitational wave detectors to detect a small extra 'push' or acceleration on normal matter caused by dark matter clumps.
The Belle II experiment has analyzed a small amount of data collected during the start-up phase of SuperKEKB in 2018. The analysis did not provide any indication of the Z' boson, but it did limit the mass and coupling strengths of the particle with previously unattainable accuracy. This result does not rule out the existence of the Z' ...
Researchers have found a connection between the size and structure of galaxies and dark matter halos, using observations of faint galaxies around the Milky Way. They also discovered more evidence for the existence of Large Magellanic Cloud satellite galaxies, predicting an additional 150 or more very faint satellites awaiting discovery.
A new study from the University of Michigan and Lawrence Berkeley National Laboratory has found no evidence that sterile neutrinos are dark matter. The research team used archival data from the XMM-Newton space X-ray telescope to search for signs of dark matter in the Milky Way galaxy, but their analysis yielded no results.
Researchers used XMM-Newton space telescope data to search for a 3.5 keV X-ray emission line, a predicted signature of dark matter decay. No evidence was found, ruling out the signal strength by over an order of magnitude and challenging previous interpretations.
Researchers develop new technique to analyze X-ray telescope observations of 'empty' space within Milky Way galaxy, finding no evidence for 3.5 keV line associated with dark matter decay. The study's results limit simple models of dark matter and pave the way for future discoveries.
Researchers used a computer algorithm inspired by slime mould to create a three-dimensional map of the cosmic web structure in the local Universe. The analysis revealed that intergalactic gas is organised into filaments and detected at distances over 10 million light-years from galaxies.
Researchers at Institute for Basic Science (IBS) in South Korea have reported the first high-sensitivity results of their axion dark matter search. They used a custom-made CAPP-8TB haloscope to detect potential axions, finding no evidence within a specific mass range.
Researchers use a Physarum-based algorithm to visualize the cosmic web's filaments, connecting galaxies and diffuse hydrogen gas. The model replicates the distribution of dark matter on large scales, providing a new tool for understanding the universe's structure.