Articles tagged with Dark Matter
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Comprehensive study of the universe beyond Earth, encompassing celestial objects, cosmic phenomena, and space exploration. Includes astronomy, astrophysics, planetary science, cosmology, space physics, astrobiology, and space technology. Investigates stars, galaxies, planets, moons, asteroids, comets, black holes, nebulae, exoplanets, dark matter, dark energy, cosmic microwave background, stellar evolution, planetary formation, space weather, solar system dynamics, the search for extraterrestrial life, and humanity's efforts to explore, understand, and unlock the mysteries of the cosmos through observation, theory, and space missions.
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Recent study finds satellite dwarf galaxies in the Milky Way and Andromeda do not behave as predicted by the standard model of galaxy formation. The galaxies are instead found in huge disks, moving in the same direction, like planets in our solar system. This mismatch raises concerns about the accuracy of the standard model of cosmology.
Researchers believe a high-velocity hydrogen cloud, known as the Smith Cloud, contains and is wrapped in a substantial halo of dark matter, allowing it to survive a collision with the Milky Way. The discovery could provide insights into the formation of galaxies and the earliest star formation in our galaxy.
Recent HADES experiments have ruled out the U boson as a potential Dark Matter candidate, but the search continues. The negative results challenge the Standard Model of particle physics and leave room for further investigation into physics beyond the current understanding.
Dahl will build a new type of detector to study dark matter particles, while Stern will investigate quantum phenomena in two-dimensional materials. Their work has the potential to revolutionize our understanding of the universe.
The Illustris simulation recreates the evolution of the universe with unprecedented resolution, including spiral galaxies, elliptical galaxies, and large-scale structures. It also accurately models chemistries of individual galaxies, offering a realistic view of cosmic evolution.
Astronomers have found the closest, second-brightest hypervelocity star, speeding at 1 million mph. The star probes the supermassive black hole at the galaxy's center and the halo of mysterious dark matter, providing insights into the galaxy's structure.
Connor Richards, a second-year undergraduate student at UC Riverside, has won the Barry M. Goldwater Scholarship for his research in high-energy physics. He is participating in research at the Large Hadron Collider to detect evidence of supersymmetry and understand dark matter.
Researchers have made significant advancements in sensitivity and believe a dark matter particle interacts with ordinary matter rarely, according to conference discussions. The hunt for dark matter continues, with the LHC yet to find evidence of supersymmetry, but potential discovery could reveal dominant form of universe-seeding matter.
Researchers use Fermi Gamma-ray Space Telescope data to identify excess gamma-ray emission at high energies, consistent with dark matter annihilation. The signal is difficult to reconcile with other explanations and provides a strong case for the existence of dark matter.
The LUX detector demonstrates its high sensitivity to potential signals in the search for low-mass dark matter particles. The new calibration confirms that no evidence of such particles was found during the detector's initial run.
Lawrence Berkeley National Lab researchers present on topics including improved climate models, synthetic biology for better biofuels, emerging materials for photovoltaics, and efforts to detect Dark Matter. The presentation highlights the importance of reducing greenhouse gas emissions and exploring innovative solutions.
The AGORA project aims to resolve inconsistencies in supercomputer simulations of galaxy evolution by comparing results from different codes and processes. By applying the principle of reproducibility, researchers hope to identify key physics ingredients that produce realistic galaxies.
The AGORA project aims to resolve issues in galaxy formation simulations by systematically comparing high-resolution codes using a common set of initial conditions and astrophysical assumptions. The comparisons will help researchers determine which simulation results are due to the code platform or underlying theoretical assumptions.
The team uses a powerful magnet and supercooled microwave receiver to detect faint interactions between axions and electromagnetic radiation. They aim to find cold dark matter axions in the Milky Way galaxy, which could make up 1/4 of the universe's mass.
The LUX experiment has proven to be the most sensitive dark matter detector in the world, detecting rare interactions between dark matter particles and ordinary matter. With its highly sensitive detection capabilities, LUX is blazing a path to illuminate the nature of dark matter and pin down the correct models.
The LUX experiment has excluded some possible candidates for a dark matter particle, providing evidence for its sensitivity and ruling out certain Weakly Interacting Massive Particle (WIMP) hypotheses. The detection is significant as it shows that the world's best results are being produced by the detector.
The Large Underground Xenon (LUX) experiment has reported promising results, validating its design and performance. The detector is now beginning a process to uncover the exact identity of the dark matter particle.
Researchers propose that most of the universe's dark matter could be made up of particles with a donut-shaped electromagnetic field called an anapole. This unique property makes it difficult to detect, but also allows for specific predictions about its behavior in vast detectors.
Researchers detected a surprising clutch of hydrogen clouds, each as massive as a dwarf galaxy, in the space between M31 and M33. The clouds were found to be traveling through space at velocities similar to their parent galaxies, suggesting they are independent entities.
The UC San Diego/Open Science Grid collaboration successfully processed massive LHC data using SDSC's Gordon Supercomputer, providing crucial input for international planning meetings on particle physics. The project helped define the future research agenda and accelerated the search for dark matter.
The Planck space mission has released its most accurate map of the oldest light in the universe, revealing a slower expansion rate and less dark energy. The new data also provide insights into dark matter and normal matter contents, challenging current models.
The Planck satellite provides an unprecedented level of detail about the cosmic microwave background, confirming the standard model of cosmology at exceptional accuracy. Anomalies in the data suggest the Universe may be different on scales larger than those directly observable.
The European Space Agency has selected NASA's Goddard team to join the Euclid mission, a space telescope designed to probe the mysteries of dark energy and dark matter. The project aims to explore the cosmic infrared background and provide insight into stellar and galactic populations in the early universe.
Irene Sendra's research proposes a dynamic, dark energy model that varies over time, consistent with observations of the universe's acceleration. She also unites dark energy and dark matter into a single component, achieving better results in her models.
Astronomers have found that a merging galaxy cluster's 'dark core' does not appear to be over-dense in dark matter. The study uses improved Hubble camera capabilities to map the cluster's dark matter distribution, with a ratio of 2.5 to 1 of dark matter to normal matter, aligning with expectations.
Researchers suggest that small numbers of stars kicked to the edges of space during galaxy collisions may explain infrared light 'halos'. This theory proposes that only one-tenth of 1 percent of stars are distributed like dark matter, producing fluctuations in the cosmic background.
UCI astrophysicists analyze NASA data suggesting gamma rays could be evidence of dark matter particles annihilating each other. The observation is consistent with leading theories for dark matter and its presumed presence at galactic centers.
A new technique has revealed a significant amount of dark matter near the Sun, contradicting previous studies that found less. The researchers used a simulation of the Milky Way to test their method and obtained a high measure of local dark matter density.
Astronomers have discovered that the Milky Way's stars are moving in unexpected ways, suggesting a recent encounter with a small galaxy or dark matter structure. The team found a north-south asymmetry in the distribution of stars, which may be caused by a vertical wave formed by the object's passage.
Researchers use Lonestar supercomputer to create nearly 100,000 models of one galaxy, representing the range of possible ways stars can move. They find that dark matter is more spread out at the edge of the galaxy than previously thought, with a fluffier distribution but the same total amount.
Researchers suggest mirror particles could be responsible for the missing mass of the universe due to an anomaly in neutron behavior. The loss rate of slow neutrons appears to depend on magnetic field strength, which could indicate a parallel world with invisible mirror twins.
A new study using Chandra data reveals two galaxies with supermassive black holes growing at a rate outpacing their host galaxies. The findings suggest that dark matter halos and black holes are linked in the growth of these galaxies, contradicting previous assumptions.
The Large Underground Xenon (LUX) detector is a trap set for dark-matter WIMPs, with a titanium bottle holding 350 kilograms of liquid xenon. The new LUX ZEPLIN project aims to increase sensitivity by orders of magnitude.
The Musket Ball Cluster is a newly discovered galaxy cluster where so-called normal matter has been wrenched apart from dark matter through a violent collision. The system, observed 700 million years after the collision, provides valuable insight into the evolution of galaxy clusters and their member galaxies.
Scientists analyzed two years of data from NASA's Fermi Gamma-ray Space Telescope to detect gamma-ray signals from hypothetical particles. No signals were detected, ruling out WIMP candidates within a specific range of masses and interaction rates as dark matter.
Astronomers have detected a cosmic effect that could provide insight into the forces behind the universe's formation, including dark energy and dark matter. The kSZ effect was seen in the movement of distant galaxy clusters, with velocities measured up to 600 kilometers per second.
Researchers used Chandra X-ray Observatory and other telescopes to map dark matter in galaxy cluster Abell 383. The study found a stretched-out, football-like shape of dark matter, with the point aligned close to the line of sight. The results challenge standard models and suggest further research is needed to resolve the discrepancy.
Astronomers have obtained a unique close-up look at the brightest gravitationally magnified galaxy yet discovered using NASA's Hubble Space Telescope. The image revealed regions of star formation glowing like bright points of light, which are much brighter than any star-formation region in our own galaxy.
Astronomers have observed a clump of dark matter in the Abell 520 galaxy cluster, which contradicts current theories about its behavior. The team used the Hubble Space Telescope to map dark matter, revealing a core rich in dark matter but containing no luminous galaxies.
A University of Oklahoma graduate student has been awarded a national physics award for his groundbreaking research on dark matter. His thesis explores the mixture of two particles, axion and lightest supersymmetric (LSP) theory, providing a more intricate picture of dark matter.
The Kavli Institute aims to crack the puzzles of cosmological theory, including dark energy's repulsive gravity, dark matter's composition, and cosmic inflation's rapid expansion. New simulations and detectors will help scientists uncover new physics beyond current theories.
A team of scientists has detected a faint 'satellite galaxy' 10 billion light years away, making it the lowest-mass object at such a distance. This finding could help confirm or reject theories about the structure of the cosmos.
Researchers studied a galaxy cluster 5 billion light years away, finding that it has passed through each other without collision. The study revealed that most of the dark matter had also passed through, but gas clouds collided, creating a huge cloud of superheated gas.
A team of astronomers has discovered the largest galaxy cluster ever seen in the distant Universe, nicknamed El Gordo. The cluster consists of two separate subclusters colliding at high speeds and is so far away that its light has travelled for seven billion years to reach Earth.
Researchers have created the largest-scale map of dark matter, showcasing a intricate cosmic web that covers over one billion light years. By analyzing images of 10 million galaxies, they were able to detect the distortion caused by dark matter and gain insight into its distribution.
Researchers mapped dark matter using images of 10 million galaxies in four regions, studying distortion of light as it passes massive clumps of dark matter. The study reveals a vast network of dense and empty regions, providing the first direct glimpse at dark matter on large scales.
Scientists at Fermilab and Berkeley Lab have created the largest direct measurements of dark matter yet, using new methods that will improve ground-based surveys. The maps show a clearer picture of the universe's past, which is crucial for understanding dark energy.
Astronomers detect first low-mass star in globular cluster M22 using gravitational microlensing, suggesting alternative explanation for cluster mass. The star has less than a fifth of the sun's mass and is 3.2 kiloparsecs from it.
Researchers confirm detection of antimatter positron excess with assistance from Earth's magnetic field, casting doubt on dark matter explanation. The Fermi Gamma-ray Telescope's unique approach utilizes the Earth's magnetic field to separate charged particles, providing valuable insight into the universe.
Researchers from Brown University report that dark matter must have a mass greater than 40 GeV to explain the universe's accelerated expansion. This limits potential weakly interacting massive particle (WIMP) candidates, which were previously suggested by other experiments.
Astronomers use Hubble's unprecedented precision to map dark matter in 25 massive galaxy clusters, challenging previous assumptions about its distribution. The survey's findings suggest that galaxy cluster assembly may have begun earlier than previously thought.
The Bolshoi supercomputer simulation, based on WMAP5 parameters, provides a powerful new tool for studying galaxy formation, dark matter, and dark energy. Initial studies show good agreement between the simulation's predictions and astronomers' observations.
Researchers at Princeton University and NYU have developed a method to detect the collision of stars with primordial black holes, which are believed to be a source of dark matter. The new technique uses existing solar observation methods to identify subtle vibrations in a star's surface caused by a passing black hole.
A supercomputer simulation by University of Pittsburgh researcher Christopher W. Purcell suggests that the Milky Way's spiral arms were triggered by a collision with the Sagittarius Dwarf galaxy. The impact stripped off 80-90% of the dark matter halo, producing instabilities that eventually formed the spiral arms and ring structures.
Researchers at UC Irvine discovered that the Milky Way's spiral arms are a result of an intergalactic collision course with a dwarf galaxy named Sagittarius. The force of the impact sent stars streaming from both galaxies into long loops, which were then swelled and tugged outward by the Milky Way's rotation.
Researchers at University of California, Santa Cruz and Institute for Theoretical Physics in Zurich simulate formation of massive spiral galaxy like Milky Way, resolving key features with high-resolution simulation. The result supports prevailing cold dark matter theory, which predicts galaxies form within dark matter halos.
Researchers leverage supercomputers to investigate dark energy, a mysterious force driving the universe's expansion. They develop new models that allow for more accurate analysis of subtle dark matter clustering features, such as Baryon Acoustic Oscillations (BAO), crucial for constraining cosmological parameters.
The Hubble Space Telescope has captured the complex history of Pandora's Cluster, a giant galaxy cluster resulting from the simultaneous collision of four smaller clusters. The data reveal that dark matter dominates the cluster's mass, with gas making up only 5% of its total mass.
Researchers use gravitational lensing to map dark matter distribution in the cluster, while NASA's Chandra X-ray Observatory observes hot gas. The study reveals a complex collision that separated out hot gas and dark matter, separating them from visible galaxies.
The CoGeNT experiment has detected a seasonal signal variation in its data, consistent with the predictions of Weakly Interacting Massive Particles (WIMPs). The team is cautious, as the signal could be due to random fluctuations or experimental errors.