Articles tagged with 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.
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.
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.
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.
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.
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.
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.
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 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.
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.
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 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.
Researchers have found the first direct correlation between dark matter and gamma rays in the universe. The study used gamma ray data from Fermi Large Area Telescope and mapped it with weak gravitational lensing, providing insights into the nature of dark matter and its potential connection to gamma ray emissions.
Researchers suggest that axionic dark matter surrounding compact stars can prevent catastrophic magnetic field losses while allowing for abnormal rotation. This theory provides an alternative to previous understanding of rapidly rotating objects with strong magnetic fields.
Laura Sales, an assistant professor at UC Riverside, has received a $720,000 NSF CAREER Award to study dark matter content in dwarf galaxies. Her research aims to refine the Lambda Cold Dark Matter model and address questions about galaxy formation and evolution.
Researchers at the University of California, Davis used gravitational lensing to study dark matter's properties. They found that dark matter particles could be lighter and more rapidly-moving, which may affect galaxy formation.
Researchers discovered a correlation between the unresolved gamma-ray background and matter distribution in the distant universe, suggesting that dark matter could be a source of the faint cosmic glow. The study used data from the Dark Energy Survey and Fermi Gamma-ray Space Telescope to analyze the correlation.
The NSF Vera C. Rubin Observatory will conduct a vast astronomical survey, mapping the Milky Way and probing dark energy and dark matter. Vera Rubin's groundbreaking work uncovered the existence of dark matter, making this observatory a fitting tribute to her legacy.
Researchers analyzed rotation curves of low-surface-brightness galaxies to discover a universal relationship describing dark matter's distribution. This result consolidates clues on dark matter's presence and behavior, opening up new scenarios for interactions with bright matter.
A study published in Nature Astronomy found 19 dwarf galaxies dominated by baryons at radii beyond their half-optical radius, challenging standard galaxy formation models. The results encourage a reevaluation of dark matter's nature.
The James Webb Space Telescope will study dwarf galaxy companions to the Milky Way and Andromeda, gaining insights into galaxy formation and dark matter. By measuring star motions, researchers hope to determine if some galaxies are grouped in a flat plane, which would have significant implications for understanding their formation.
Researchers analyzed 1418 galaxies and found small ones spin differently than large ones. The alignment changes as galaxies collide and merge with others, gaining mass. The study offers insight into the deep structure of the universe and how galaxies form.
Scientists explore how dark matter influences antimatter, searching for clues that could link the two aspects of the universe. They use captured antiprotons to detect changes in spin precession frequency, which could indicate dark matter's presence.
Scientists investigate potential connection between antimatter and dark matter using laboratory experiments. They found no difference in interaction, setting new limits on fundamental physics.
WFIRST's wide-field surveys will study galaxy distributions and dark matter effects, providing new insight into its fundamental nature. The mission aims to fill gaps in understanding dark matter, tracing its role in galaxy formation and evolution.
Researchers at University of California, Riverside discover that Milky Way is undergoing a massive merger with its largest satellite galaxy, the Large Magellanic Cloud. Several ultrafaint dwarfs and relatively bright satellite galaxies were likely stolen from LMC.
Researchers propose a novel method to search for dark matter by harnessing the power of plasmas and magnetic fields. This approach, known as axion plasma haloscopes, enables the detection of dark matter in previously unexplored areas. By tuning into specific frequencies, scientists may uncover evidence of this elusive substance.
A team led by Prof Swati Singh is exploring the use of quantum systems to study astrophysical phenomena. They are developing smaller detectors that can be used to detect weak forces exerted by dark matter and gravitational waves, which could provide new insights into these mysteries.