Articles tagged with Dark Matter
Scientists measured the proportion of unstable particles in dark matter after the Big Bang, finding it was no more than 2-5%. This discrepancy can be explained by decaying dark matter hypothesis, suggesting dark matter decayed over time.
Researchers studied 36 mini-spiral galaxies and found a link between ordinary matter and dark matter. The structure of dark matter mimics visible matter in its own way, disagreeing with current hypotheses.
Scientists have gained fresh insight into dark matter, a key component of the universe. Using powerful telescopes to analyze distant galaxies, they found that dark matter is less dense and more evenly spread throughout space.
Axion Dark Matter workshop hosted by Frank Wilczek at Stockholm University brings together leading researchers to explore the experimental front. The workshop aims to make breakthroughs in understanding axions' existence and its impact on fundamental physics.
Researchers from the Niels Bohr Institute have recreated characteristics of ultra-diffuse faint galaxies using computer simulations. The study reveals that supernovae explosions during star formation can push stars and dark matter outwards, causing galaxies to expand and become faint.
William Shepherd, a US-American particle physicist, has received the Sofja Kovalevskaja Award to establish a junior research group on dark matter at Mainz University. The award provides funding for a team of researchers to investigate this phenomenon.
Researchers used a German-Hungarian team to extend the Standard Model and predict axion mass range for dark matter detection. The results suggest that axions could make up 85% of the universe's mass, with masses between 50-1500 micro-electronvolts.
Theoretical modeling work resolves debates on dwarf galaxy formation by accurately predicting their properties. The new simulation brings theoretical predictions into better agreement with observations of dwarf galaxies surrounding the Milky Way.
Researchers from Johns Hopkins University suggest that fast radio bursts could provide clues to dark matter by detecting black holes of a specific mass. The team argues that the brief flashes of radio-frequency radiation can detect black holes with masses predicted for dark matter, offering a direct probe of this phenomenon.
UCI researchers found evidence that supports a light particle as the key to understanding dark matter in the universe. The study suggests the existence of a protophobic X boson, a force-carrying particle with extremely limited range.
The Fermi mission has excluded a small range of axion-like particles that could have comprised about 4 percent of dark matter, while also providing the strongest constraints to date for certain masses. Additionally, researchers found no statistically significant signal from dark matter annihilation in the Small Magellanic Cloud.
The Large Underground Xenon (LUX) experiment has completed its search for dark matter with sensitivity far exceeding expectations, but yielded no trace of a dark matter particle. This result eliminates many potential models for dark matter particles, offering critical guidance for the next generation of dark matter experiments.
The LUX experiment has completed its search for dark matter, yielding no trace of a particle despite achieving record sensitivity. The results provide critical guidance for future dark matter experiments by eliminating potential models.
A Johns Hopkins team proposes a solution to the dark matter mystery by suggesting that black hole binaries detected by LIGO may be a signature of primordial black holes. The team's calculations match the predicted mass range for these mysterious objects, making them a plausible candidate for dark matter.
PhD candidate Gwendolyn Eadie has developed a method to estimate the mass of the Milky Way using globular cluster velocities. This approach predicts the mass contained within any distance from the center of the galaxy, providing new insights into the dark matter component.
A new study by NASA scientist Alexander Kashlinsky proposes that primordial black holes, formed in the universe's first second, could make up dark matter. If correct, this would mean all galaxies are embedded within a vast sphere of black holes with masses similar to the sun.
A team of astronomers has measured the mass of an ultra-diffuse galaxy using the Gran Telescopio CANARIAS, revealing it is composed primarily of dark matter with very few stars. The findings suggest that such galaxies could exist due to a large amount of dark matter protecting them from destruction.
Dmitry Budker, Experimental Atomic Physics professor at Mainz University, receives a EUR 2.5M ERC Advanced Grant to systematically search for dark sector particles. The project aims to identify new techniques using magnetic resonance and magnetometry to provide direct connections to the dark sector.
A research team at Stockholm University used NASA's Fermi satellite to study light from the Perseus galaxy cluster, finding no traces of axion-like particles. The observations excluded certain types of ALPs that could explain a small amount of dark matter, advancing sensitivity for future experiments.
Researchers at the University of Southern Denmark propose a new model for dark matter, suggesting a heavier particle that interacts only through gravity. This PIDM particle could have been created in the early universe under extremely hot conditions, and its existence can be tested using planned gravitational wave experiments.
Physicists at Université de Genève developed a new code that simulates the rotation of space-time and gravitational waves in the formation of large-scale structures. This allows for more precise calculations than current codes, enabling the study of dark energy's role in the universe's expansion.
The Wide Field Infrared Survey Telescope (WFIRST) will aid researchers in unraveling the secrets of the universe by studying dark energy and dark matter. The observatory will discover new worlds outside our solar system and advance the search for life-suitable planets.
Recent improvements in experiments like Large Underground Xenon have increased the chances of detecting WIMPs, believed to be the main component of dark matter. Dark matter scientists are on the brink of a discovery that could fundamentally change our understanding of the physical universe.
Two studies find gamma ray signals in the galactic center are unlikely caused by dark matter collisions. Instead, they could be attributed to fast-rotating stars called millisecond pulsars. Researchers used statistical analysis methods to analyze images of gamma rays captured by NASA's Fermi Gamma-ray Space Telescope.
Physicists have made a groundbreaking discovery in the field of dark matter research. The CRESST-II detector has achieved unprecedented sensitivity levels, allowing scientists to detect even the lightest dark matter particles for the first time.
A study published in Physical Review Letters shows that a galaxy cluster's formation history plays a role in its interaction with the surrounding dark matter halo. The researchers found that clusters formed from more dispersed galaxies were clumpier and interacted differently with their environment.
Researchers found that galaxy clusters' surroundings are shaped by their formation history, not just their mass. The study used gravitational lensing to confirm the connection between cluster mass and dark matter environment.
Physicists propose a smaller secondary inflationary period to account for the universe's estimated dark matter abundance. This new theory suggests a 'hidden sector' of physics, where interactions dilute primordial particle abundances, leaving behind the observed dark matter density.
A new method of galactoseismology has confirmed the existence of a dark-matter dominated dwarf galaxy and may help locate satellite galaxies. The method uses waves in the galactic disk to map the interior structure and mass of galaxies, offering a fresh perspective on understanding dark matter.
Researchers at UCSB have improved LUX's sensitivity by 20 times using a neutron calibration technique. The new method helps rule out potential dark matter detections at low masses, excluding alternative particle models.
LUX scientists have improved the detector's sensitivity for low-mass dark matter particles, enhancing their ability to detect WIMPs. The new calibrations help rule out potential detections at low-mass ranges where other experiments had previously reported results.
Astronomers discovered nine monstrous baby galaxies 11.5 billion light-years away, pinpointed by ALMA's high resolution. These young galaxies reside at the intersection of massive filaments in dark matter, supporting a model for their formation.
Astronomer Evan Kirby measures high concentration of dark matter in small dwarf galaxy Triangulum II, potentially making it a leading candidate for direct detection. The galaxy's unique characteristics and minimal background noise make it an ideal location to search for gamma-ray signals from colliding dark matter particles.
A doctoral student at the University of Kansas has been awarded a yearlong Fermilab Graduate Student Fellowship in Theoretical Physics to work on dark matter research. He aims to investigate the universe's deepest riddles, including its place in the cosmos and the history of human existence.
Researchers developed a machine-learning simulation system to create accurate galaxy models, reducing computational time. The method uses algorithms to approximate properties from rare simulations, producing nearly identical galaxy distributions.
A new theory suggests that dark matter could be composed of electrically charged constituents that interact with ordinary matter in the early universe. This 'stealthy' dark matter would have been easy to detect at high temperatures but is now difficult to see due to its compositeness and confinement.
Researchers have expanded their search radius for dark matter particles using the CRESST experiment, which can now detect particles with masses below 10 GeV/c^2, including those comparable to a proton. The new detectors are being equipped and will begin measuring in late 2015.
Physicists suggest detecting dark matter through radiation signals created by particle collisions, increasing chances of detection in underground detectors and specific areas in space. The current satellite-based experiments may have been searching for the wrong signals.
The XENON100 detector achieved high sensitivity, challenging traditional dark matter models. The team recorded faint annual modulation signals in the data, raising questions about the nature of dark matter.
A UCLA physicist tested dark energy theories by mimicking the vacuum of space using cold atoms. The study found no difference in the acceleration of cesium atoms when changing the location of a dense object, providing insight into how chameleon fields interact with normal matter.
Researchers from the XENON Collaboration report on a search for dark matter using an underground detector in Italy. The results set limits on several types of dark matter candidates and provide new insights into the nature of dark energy.
A newly discovered dwarf galaxy is radiating high-energy gamma rays, potentially pointing to the presence of dark matter. The detection was made using publicly available data from NASA's Fermi Gamma-ray Space Telescope and has sparked excitement in the scientific community.
Scientists using Dark Energy Survey find eight faint celestial objects orbiting Milky Way, which could indicate more galaxies hiding nearby. These discoveries suggest our cosmic neighborhood is more densely populated than previously thought, with implications for understanding dark matter and galaxy formation.
A team of Caltech astronomers has discovered a giant swirling disk of gas 10 billion light-years away, which is actively being fed cool primordial gas tracing back to the Big Bang. The finding provides the strongest observational support yet for the cold-flow model of galaxy formation.
Chakrabarti's new study will create a simulated map of satellite populations from analyzing extended atomic hydrogen disks, which may answer the
A new theory suggests dark matter behaves similarly to pions, which hold atomic nuclei together. This finding resolves outstanding discrepancies in predicted mass distributions within galaxies and clusters of galaxies.
Researchers found that galaxies in the Coma Cluster could have as much as 100 times more dark matter than visible matter, allowing them to survive and thrive. The study used computer simulations to model how these 'dead' galaxies evolved into their current state.
Researchers developed a new map of dark matter distribution using DES data, providing valuable tool for cosmology to answer questions about dark energy and dark matter. The mass map allows scientists to check their work and verify the relationship between galaxy distribution and dark matter density.
A new NASA simulation reveals that dark matter particles colliding in a black hole can produce strong, potentially observable gamma-ray light. This detection could provide new insights into both black holes and the nature of dark matter.
The Large Synoptic Survey Telescope (LSST) will survey the entire Southern Hemisphere's sky, collecting 30 terabytes of data nightly. The telescope aims to map 20 billion galaxies and observe supernovae, offering stringent tests on dark matter and dark energy.
A 3D map of galaxy superclusters has been created, providing insights into dark matter and its distribution in the universe. The map, published online in Monthly Notices of the Royal Astronomical Society, spans nearly two billion light years.
Researchers observed four colliding galaxies and found a lag between dark matter and its associated galaxy, suggesting that dark matter interacts with forces other than gravity. This discovery could be the first evidence for rich physics in the dark sector, helping scientists better understand dark matter's nature.
Researchers detect lagging dark matter clump in galaxy collision, suggesting interaction with forces other than gravity. This finding rules out the standard theory of Cold Dark Matter, potentially revealing new physics and behavior.
The Dark Energy Survey has released a series of detailed maps of dark matter, created with the world's most powerful digital camera. The analysis will help scientists understand dark matter's role in galaxy formation and probe the nature of mysterious dark energy.
Astronomers studied 72 large cluster collisions using Hubble and Chandra observations. They found dark matter continues straight through collisions without slowing down, interacting even less with itself than previously thought.
A recent study published in Science reveals that dark matter particles do not interact with themselves when galaxy clusters collide, contradicting the view that they consist of proton-like particles. This finding challenges a major theory and raises new questions about the nature of dark matter.
A team of astronomers from University of Cambridge identified nine new dwarf satellites orbiting Milky Way, largest number ever discovered. The findings may help unravel mysteries behind dark matter, invisible substance holding galaxies together.
Astronomers spotted a distant supernova split into four images due to the gravity of a massive elliptical galaxy embedded in a cluster. The unique observation will help refine dark matter estimates and study the mass of the lensing galaxy and cluster.
Researchers observed a rare phenomenon where the light from a distant supernova is deflected by a massive galaxy, creating four separate images. The discovery provides insights into dark matter, which makes up about 95% of the universe's mass.
A team of astronomers has discovered a distant star exploding as a supernova, with four images captured by NASA's Hubble Space Telescope. The unique alignment is due to the powerful gravity of a foreground galaxy embedded in a massive cluster, providing a rare opportunity to study dark matter.