Articles tagged with Dark Matter
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.
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.
Researchers used ALMA to study gravitational lens system MG J0414+0534, detecting dark matter distribution fluctuations down to 30,000 light-years. The observed distribution is consistent with models for slow-moving dark matter particles.
Researchers propose using gravitational wave searches to detect dark matter through neutron star effects. The study forecasts constraints on heavy dark matter particles within the next decade, offering a potential tool for testing dark matter theories.
A new study by Kyu-Hyun Chae found conclusive evidence for the breakdown of standard gravity in low acceleration limit using up to 26,500 wide binaries observed by Gaia. The results show a boost factor of 30-40% higher than Newton-Einstein prediction, meeting conventional criteria of 5 sigma significance.
The galaxy NGC 1277, a massive relic galaxy, has been found to lack dark matter, contradicting current cosmological models. The team used integral field spectrograph observations to determine the mass distribution within the galaxy, revealing that it is solely composed of stars.
Astrophysicists analyze James Webb Space Telescope images to find three bright objects that might be 'dark stars,' powering themselves with annihilating particles of dark matter. The discovery could reveal the nature of dark matter and solve the puzzle of galaxy formation.
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...
Scientists discover threadlike arrangement of galaxies, anchored by a quasar, which marks the first time such a structure has been observed at 6% of its current age. The findings provide clues about the fundamental architecture of the universe and the formation of supermassive black holes.
A recent study from SISSA suggests that dark matter interacts with gravity in a non-local way, providing a fresh perspective on its nature. The new model, which employs fractional calculus, accurately describes the motion of stars in smaller galaxies.
Researchers at PTB used a sensitive atomic clock to compare with two other clocks, searching for oscillations signature of ultralight dark matter. No significant signal detected, setting new experimental upper limits on the coupling of ultralight matter to photons.
Researchers from UNIGE have developed a new method to test the validity of Einstein and Euler's theories on the accelerating Universe expansion and dark matter. The study uses time distortion as a never-before-used measure, allowing for differentiation between the two equations.
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.
Researchers discovered a gravitationally lensed supernova named SN Zwicky, which was magnified nearly 25 times by a foreground galaxy. This discovery presents an opportunity to study the inner cores of galaxies, dark matter, and the mechanics behind universe expansion.
The CALET team, including researchers from Waseda University, found that cosmic ray helium particles follow a Double Broken Power Law, indicating spectral hardening and softening in high-energy ranges. This deviation from expected power-law distribution suggests unique sources or mechanisms accelerating and propagating helium nuclei.
A team of researchers from the University of Minnesota has successfully measured the expansion rate of the Universe using data from a magnified supernova. Their findings provide new insight into the problem and bring scientists closer to obtaining the most accurate measurement of the Universe's age.
Researchers found Dark Matter does not consist of ultramassive particles but rather ultralight particles that travel like waves. The discovery resolves an outstanding problem in astrophysics and provides new insights into the nature of Dark Matter.
The SuperBIT telescope has begun capturing high-resolution images of the Universe on its first research flight. It is investigating the mystery of dark matter, which is thought to be made up of particles that can bounce off each other during galaxy collisions.
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.
Astronomers have mapped the M87 galaxy's 3D structure and determined its supermassive black hole has a mass of 5.37 billion times that of the sun. The galaxy's asymmetrical shape allows for more precise measurements, including the rotation rate of 25 kilometers per second around an axis 40 degrees from the long axis.
Researchers from the Atacama Cosmology Telescope collaboration have created a groundbreaking new image that reveals the most detailed map of dark matter distributed across a quarter of the entire sky. The study confirms Einstein's theory of how massive structures grow and bend light, supporting the standard model of cosmology.
The Princeton-led team measured the dark matter's 'clumpiness,' finding a value of 0.776 that conflicts with the Cosmic Microwave Background's value of 0.83. The discrepancy suggests the standard model might be incomplete or has an error, prompting further investigation.
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.
Researchers developed an active model to describe systems of many active particles, finding similarities with the Schrödinger equation and analogies to quantum effects such as tunneling and dark matter.
Scientists have created a synthetic survey that showcases what can be expected from the Roman Space Telescope’s future observations. The simulation contains 33 million galaxies and 200,000 foreground stars, helping scientists plan observing strategies and test data analysis methods.
A University of Queensland-led research team is using an unusual caesium atom to search for dark matter particles. The team's work may also improve atomic theory calculations and technology, such as navigation systems.
Researchers have successfully set up a highly sensitive detector for measuring radioactivity at the Felsenkeller laboratory in Dresden, allowing them to study rare processes and low activities in physics. The detector's ultra-low sensitivity enables analysis of samples with extremely low radioactivity levels.
A South Korean research team has successfully searched for Dine-Fischler-Srednicki-Zhitnitskii (DFSZ) axion dark matter using a new experimental setup. The group achieved a higher sensitivity than existing experiments, excluding axion dark matter around 4.55 µeV at DFSZ sensitivity.
A team of researchers has created a highly accurate map of the universe's matter distribution, combining data from two major telescope surveys. The analysis reveals that matter is less 'clumpy' than expected, suggesting potential inconsistencies with the current standard model of the universe.
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.
Using supercomputers and machine learning, researchers created simulations of millions of computer-generated universes to test astrophysical predictions. The study found that supermassive black holes grow in the same way as their host galaxies, revealing a long-elusive relationship.
Researchers have found a possible explanation for the discrepancy between observations and simulations in the cosmic web. By using low-redshift intergalactic medium data as a calorimeter, they discovered that ultralight dark photons could provide an additional heating mechanism to reconcile the difference.
Scientists measure antihelium nuclei survival rate at ALICE experiment, laying foundation for dark matter search. Galaxy found to be 50% permeable for antinuclei, with implications for future experiments and search for antimatter in space.
Physicist Ferah Munshi is testing self-interacting dark matter with galaxy formation simulations to test CDM and SIDM paradigms. The study aims to reproduce diverse galaxy densities and shapes, shedding light on the universe's smallest-scale mysteries.
Researchers propose using space atomic clocks to detect ultralight dark matter oscillations near the Sun. The experiment aims to probe a region with minimal constraints on dark matter density, potentially leading to world-leading limits on dark matter searches.
A new proposal aims to detect ultralight dark matter using atomic clocks in space. The clocks will track changes in energy oscillations caused by dark matter, allowing researchers to measure its presence.
An international team of researchers has successfully characterized the earliest galaxies in the Universe, which formed only 200 million years after the Big Bang. The study found that these early galaxies were relatively small and dim, processing less than 5% of their gas into stars.
A team of scientists at the University of Bern's Albert Einstein Center for Fundamental Physics has successfully narrowed the scope for the existence of dark matter using a precision experiment with neutron spin clocks. The results excluded axion-like particles and set new limits on dark matter existence.
The Pantheon+ analysis reveals that the universe is composed of about two-thirds dark energy and one-third matter, mostly in the form of dark matter. This finding strengthens the Standard Model of Cosmology, but also highlights an unresolved disagreement over the pace of expansion.
Scientists have confirmed 68 strong gravitational lenses, transforming our understanding of galaxy evolution and dark matter. The discovery uses machine learning algorithms to identify thousands of potential lenses, opening a new window into studying mass distribution in distant galaxies.
Researchers found that dark matter halos in ultra-diffuse galaxies have lower concentrations than expected, raising questions about their formation and evolution. The study's surprising results indicate these galaxies may be younger and contain more gas than normal galaxies.
Researchers propose using precision data from upcoming experiments to test the cosmological collider effect and unravel the mystery of matter's origin. They suggest that leptogenesis, a well-known mechanism, could be used to explain the imbalance between matter and antimatter in the early universe.
A team of researchers has discovered that gamma-ray radiation from the Sagittarius Dwarf galaxy can be explained by millisecond pulsars, ruling out dark matter annihilation as a possible explanation. The study reveals that these stellar objects are efficient accelerators of high-energy electrons and positrons.
A team of researchers has detected a small satellite galaxy of the Milky Way filled with dark matter using gamma-ray emissions. The discovery was initially thought to be indicative of dark matter annihilation, but further analysis reveals that millisecond pulsars are more likely to be the source of the emission.
A team of researchers uses mirrors to gather more light and views of an object from different angles, allowing them to reconstruct a three-dimensional model of an atom cloud. This technique enables 'light-field imaging', capturing not just intensity but also direction of light rays.
Astronomers propose a new method to measure the universe's expansion rate by analyzing the changes in signal properties of black hole collisions. By using the entire population of black holes as a calibration tool, scientists can directly identify and correct for errors, providing a more accurate measurement.
Researchers from the University of Bonn found that dwarf galaxies in one of Earth's nearest galaxy clusters show signs of disturbance without dark matter halos. The study's results contradict previous models, suggesting an alternative gravity theory might be more accurate.
Researchers used microwaves from the cosmic microwave background to measure dark matter distribution around distant galaxies. The findings suggest a different clumpiness measurement than predicted by the Lambda-CDM model, hinting at a possible flaw in the current cosmology theories.
The FAST HI survey has discovered 544 HI-detected galaxies, including 16 that have no optical counterparts, sparking interest in galaxy formation theory. These 'dark' galaxies may represent a new type of object containing dark matter and HI gas but few stars.
Physicists have developed a method to predict the composition of dark matter by analyzing cosmological signatures. The research uses big bang nucleosynthesis and cosmic microwave background radiation to identify specific categories of dark matter with masses between those of the electron and proton.
A new SISSA study proposes the existence of 'non-minimal coupling' in dark matter, which modifies its gravitational influence on standard matter. This new property could be the key to deciphering the dialogue between dark matter and standard matter.
A team of researchers from Australian National University has found an alternative explanation for the mysterious Galactic Centre Excess, a gamma-ray signal long claimed as a signature of dark matter. The team proposes that the signal may actually come from rapidly-rotating neutron stars, known as millisecond pulsars.
Physicists are using a deposit of nearly pure argon, extracted from southwest Colorado, to search for answers about the universe's dark matter. The argon is separated from carbon dioxide and shipped to Italy for use in the DarkSide-20k detector.
Researchers at Brookhaven Lab propose a cosmological phase transition as the key to supermassive black hole formation in the early universe. This process, facilitated by ultralight dark matter particles, enabled efficient collapse of matter into black holes.
Physicists have narrowed the axion mass range to 40-180 micro-eV using advanced simulations and supercomputer power. This new estimate suggests that the most common type of experiment to detect axions won't be able to detect them, regardless of tuning.
A new study from Durham University and Kings College London presents a theoretical review strongly supporting the search for axion dark matter. Axions are proposed as a possible explanation for why the strong interaction obeys time reversal symmetry, a fundamental aspect of the Standard Model of particle physics.