Researchers use computer simulations to test dark matter's presence in satellite galaxies, finding a relationship that could clarify its existence. The study uses radial acceleration relation data from the Gaia spacecraft to make predictions about the behavior of dwarf galaxies.
A team of researchers has discovered the last reservoir of ordinary matter hiding in the universe, located in the space between galaxies. The finding is significant as it fills in the gap of about 30% of missing baryons predicted by theorists.
A new model proposes that dark inflation drove the early universe's expansion and predicts the detectability of primordial gravitational waves. The model provides a precise chronology of events during the first moments after the Big Bang.
A new technique combines satellite galaxies' motions with computer simulations to estimate a galaxy's mass. The method yields more reliable results than previous methods, especially for large datasets generated by current and future surveys.
A new study suggests that nighttime light exposure during sleep can disrupt metabolic function, leading to increased insulin resistance. The researchers found that just one night of light exposure acutely impacts measures of insulin resistance, which is a diminished ability of cells to respond to insulin.
A team of astronomers has identified at least six strong candidates for dark galaxies by leveraging the ultraviolet light from quasars to 'illuminate' gas in the intergalactic medium. The discovery could help fill a gap in our understanding of galaxy evolution, as it provides direct evidence for the existence of dark galaxies.
An inorganic semiconductor exhibits improved mechanical performance when kept in the dark, contrary to its brittleness under light exposure. The study found that zinc sulfide crystals display higher plasticity without fracture until a large strain of 45%, attributed to high dislocation mobility in complete darkness.
New research suggests that life could be common throughout the multiverse due to dark energy's impact on star and planet formation. The findings contradict the long-held notion that a specific amount of dark energy is necessary for life to emerge, raising questions about the multiverse theory's ability to explain cosmic origins.
Researchers analyzed genetic material from organisms to assess dark diversity of sharks and found three times more species in wilderness areas than traditional visual methods. The results suggest a lower estimated dark diversity of sharks in the region, potentially impacting IUCN Red List classifications and aiding conservation efforts.
Researchers found slight improvements in vision after eating dark chocolate, particularly in visual acuity and contrast sensitivity. The effects of dark chocolate on vision remain unknown beyond the short-term, and further studies are needed to confirm these findings.
Two new studies presented at the Experimental Biology 2018 meeting found that consuming dark chocolate with a high concentration of cacao (minimally 70% cacao) has positive effects on stress levels, inflammation, mood, memory and immunity. The flavonoids in cacao are believed to support cognitive, endocrine and cardiovascular health.
The Hubble Space Telescope has imaged a massive galaxy cluster, revealing its intricate structure and the presence of dark matter. The cluster is comprised of thousands of galaxies held together by gravity, with most of its mass existing in non-luminous dark matter.
Scientists decoded faint distortions in the universe's earliest light to reveal huge tubelike structures known as filaments, serving as superhighways for delivering matter to dense hubs. The study provides new insights into the formation and evolution of the cosmic web, including dark matter.
Researchers from the University of Surrey have developed a new method to measure dark matter at the centre of tiny galaxies. The study used dense star clusters orbiting close to the centre of dwarf galaxies to calculate the inner dark matter density, finding less dark matter in some cases than predicted by models.
New observations suggest dark matter may only interact through gravity, contradicting previous findings. Researchers used the Atacama Large Millimetre Array to study a galaxy cluster and found no separation between dark matter and its surrounding galaxy.
A new study reveals that algae and impurities on the Greenland ice sheet's surface are causing it to darken, leading to accelerated melting. The Dark Zone, a 400km-wide region, is found to be covered in dust and black carbon that provide nutrition for dark-colored algae.
A study by University of Seville finds that human primary activities are synchronized with the winter day as a synchronizer, rather than clock time. The study characterizes laborer's activities along the daily and yearly cycle of light and dark, revealing latitudinal patterns tied to the light/dark cycle.
Researchers have discovered the farthest individual star ever seen, Icarus, 9 billion light years away, by magnifying its brightness with the gravity of a larger object. This breakthrough study uses gravitational lensing to exclude the possibility that dark matter is made up mostly of large black holes.
Researchers have discovered a galaxy that is almost completely devoid of dark matter, forcing them to rethink the formation of galaxies. The team found that the stars in NGC1052-DF2 can account for all its mass, leaving little room for dark matter.
Scientists have found a unique galaxy that contains almost no dark matter, a finding that challenges the standard ideas of how galaxies work. The galaxy, called NGC1052-DF2, has a mass similar to that of the Milky Way but only a fraction of the expected dark matter.
Researchers using Hubble Space Telescope have discovered a galaxy with minimal to no dark matter, contradicting long-held assumptions about its presence in galaxies. The ultra-diffuse galaxy NGC 1052-DF2 contains at least 400 times less dark matter than predicted for a galaxy of its mass.
Researchers discovered a unique galaxy, NGC 1052-DF2, lacking most of its dark matter. The galaxy is as large as the Milky Way but contains only 1/200th the number of stars, leading to its classification as an ultra-diffuse galaxy.
Researchers found a galaxy with almost no dark matter, challenging the long-held idea that galaxies start with dark matter halos. The team discovered 10 globular clusters in NGC1052-DF2, which could account for all the mass in the galaxy.
Researchers propose a new particle detector design using doped gallium arsenide crystals that can scan for dark matter signals at lower energies. The technology has the potential to detect particles in the mass range measured in millions of electron volts, expanding the search for dark matter.
Astronomers have discovered a new material that could directly detect dark matter particles, expanding the search scope to unexplored mass ranges. The material detects electrons recoiling from collisions with dark matter particles and operates near absolute zero.
Researchers at University of Houston are working with DarkSide program to detect dark matter using weakly interacting massive particles (WIMPs) and liquid argon technology. The team has improved the sensitivity of their detector, DarkSide-50, by switching to low-radioactivity liquid argon.
A team of researchers has created a comprehensive dark matter map, indicating inconsistent halos with the standard cosmological model. The findings could hold new clues to understanding the accelerating expansion of the Universe.
Research suggests that medical school textbooks widely used in North America contribute to racial bias through underrepresentation of dark skin tones. The study analyzed over 4,000 human images and found that only a few percent of photos featured dark skin tones.
Researchers at Arizona State University and Tel Aviv University have discovered dark matter using radio wave signals from the early universe. The detection provides direct proof that dark matter exists and is composed of low-mass particles.
Narlikar shares personal reminiscences on the evolution of cosmology over six decades, highlighting the increase in confidence in the standard model. However, he also notes that this model lacks independent observational support and an established theoretical base.
Physicist Andrea Pocar and his team at UMass Amherst designed a key part of the DarkSide-50 detector, achieving high sensitivity in detecting WIMPs. The detector's double-phase argon technique shows promise in searching for low-mass WIMPs.
A new analysis of ultracold neutron measurements imposes strict constraints on the interactions of axions with nucleons and gluons. Researchers discovered frequency changes in neutrons that could be indicative of an 'axion wind', suggesting a specific direction of movement for these hypothetical particles.
The Mayall telescope is undergoing a major overhaul to install the Dark Energy Spectroscopic Instrument (DESI), which will measure the spectra of 5000 astronomical objects simultaneously. The instrument will allow DESI to map out about one-third of the sky and survey 30 million galaxies and quasars over a five-year period.
Recent research reveals that even weak Moonlight and aurora-induced light can trigger a rapid migration of Arctic zooplankton to deeper waters. This phenomenon is caused by the animals' extreme sensitivity to light, which can be disrupted by light pollution from vessels or ocean structures.
An international team of astrophysicists has provided the first clue to the speed of dark matter, finding that it matches the movement of the least heavy metal-rich stars. This breakthrough could help shed light on why direct detection experiments have failed to detect dark matter particles.
The largest X-ray galaxy cluster ever discovered contains the mass of three million billion suns and is composed of two colliding clusters, with most mass hidden in dark matter. Hubble's observations also show that the hot gas is being torn from the dark matter during the collision.
The discovery of eleven new stellar streams in the Milky Way confirms its role as a cosmic melting pot, with stars originating from other galaxies. The Dark Energy Survey data, made publicly available, enabled the detection of these streams, which provide evidence for the galaxy's history of migration events.
The Dark Energy Survey has publicly released its first three years of data, containing information on 400 million astronomical objects, including distant galaxies and stars in the Milky Way. The dataset also reveals 11 new stellar streams, remnants of smaller galaxies torn apart by the Milky Way.
Dark excitons, bound pairs of an electron and hole, can store information in their spin state, but reading their spins is hard due to lack of light emission. New experiments overcome this by introducing a microlens that captures more photons, enabling researchers to detect dark exciton spins more efficiently.
The neutron star collision has challenged existing theories of dark energy and gravity, ruling out a class of dark energy theories that modify gravity. The observation also supports the simplest theories, suggesting that the timing between gravitational waves and light is crucial in understanding these phenomena.
Three mathematicians argue that Einstein's General Relativity theory predicts cosmic acceleration due to an instability, contradicting the need for dark energy. The unstable Friedmann space-time exhibits accelerating local space-times with similar cosmic accelerations as dark energy theories.
Researchers have discovered two colossal galaxies from the early universe, each containing around 273 billion suns' worth of gas and dust. The combined mass of these galaxies is nearly as large as physically possible at that time, suggesting a vast amount of dark matter surrounding them.
Astronomers find two giant galaxies from the Big Bang era, forming stars at record rates and surrounded by massive dark matter halos. Their rapid star formation is triggered by close encounters with smaller companions.
Scientists use a simulation program called DaMaSCUS to study how dark matter particles interact with normal matter, potentially affecting detector performance. The researchers found that if dark matter interacts strongly with atoms, deep site detectors may struggle to detect it.
Recent observations of four colliding galaxies in the Abell 3827 cluster suggest that SIMPs, strongly interacting massive particles, may be a new candidate for the universe's elusive dark matter. SIMPs would interact strongly with themselves via gravity but weakly with normal matter, overcoming a major failing of WIMP theory.
Female horseflies can identify dark cows among equally dark patches using polarized light reflected from their smooth coats. This allows them to detect host animals more efficiently in sunny conditions.
The DAMPE mission has published its first scientific results, presenting precise measurements of cosmic ray electron flux and a spectral break at ~0.9 TeV. This data may help clarify the connection between the positron anomaly and particle dark matter annihilation or decay.
Researchers have found microorganisms in Atacama Desert soils that can potentially be used to create new treatments for HIV and combat antibiotic resistance. The discovery highlights the vast untapped resource of 'dark matter' microbes in extreme environments.
Researchers from Bigelow Laboratory discovered nitrite-oxidizing bacteria to be key players in the global carbon cycle, capturing more than 1.1 gigatons of CO2 annually. These large, relatively rare bacteria outperform archaea in carbon capture, highlighting a significant shift in our understanding of oceanic carbon cycling.
The HAWC observatory reveals two rapidly spinning stars are unlikely to be the source of an excess of anti-matter particles near Earth. The findings contradict a simple explanation involving nearby collapsed stars called pulsars, leaving room for exotic processes involving dark matter.
A new study using the High-Altitude Water Cherenkov (HAWC) observatory found that two rapidly spinning stars are unlikely to be the source of excess anti-matter particles near Earth. The observations rule out a simple explanation involving nearby collapsed stars, leaving dark matter as a possible culprit.
Scientists at the University of Sussex have disproved the existence of a specific type of axion, an important candidate for 'dark matter', across a wide range of its possible masses. The study limits the characteristics that these particles could have, sending physicists back to the drawing board in their hunt for dark matter.
The latest analysis of BaBar experiment's data limits hiding places for dark photon, ruling out its explanation for muon spin discrepancy and supporting the existence of dark matter. Researchers refine search for dark photons using decade-old particle collider data.
Researchers from University of Nevada, Reno used GPS satellites to search for dark matter clumps in the shape of walls or bubbles extending far beyond the solar system. The team found no evidence but ruled out a vast region of possibilities for this type of dark matter model, bringing them closer to defining its nature and composition.
Researchers propose a new method for directly detecting dark matter by exploiting the interaction between superfluid helium and potential dark matter particles. The strategy involves a tub of helium and a positively charged metal pin array to amplify the tiny energy signature of a released atom, enabling the detection of single atoms a...
A new cosmic picture of the universe's history shows a close agreement with previous findings, leaving little room for new physics that could reveal dark matter and dark energy. The results support the standard model of Big Bang cosmology, but scientists remain hopeful that new observations will offer clues about what lies beyond.
Astronomers analyzed 10 galaxy clusters using Hubble data and found their brightest cluster galaxies wobble around the center of mass, inconsistent with current dark matter models. This result may indicate new physics is at work, requiring a reevaluation of fundamental physics to solve the mystery of dark matter.
Recent study finds that galaxy clusters' density is smaller than predicted, and brightest cluster galaxies wobble, indicating a shallower central density. This suggests the existence of exotic forms of dark matter.
Researchers have discovered evidence of dynamical dark energy, suggesting that the nature of dark energy may not be a constant vacuum energy. The discovery was made possible by high-precision measurements of Baryonic Acoustic Oscillations and will require confirmation from next-generation astronomical surveys.
A team of physicists led by Hai-Bo Yu propose a new theory that dark matter particles strongly collide with each other in the inner halo of galaxies, explaining diverse galactic rotation curves. This self-interacting dark matter model thermalizes the inner halo, tying ordinary and dark matter distributions together.