Researchers at Max-Planck-Institut für Kernphysik recreated a reaction under conditions similar to those in the early universe for the first time. They found that the rate of this reaction remains almost constant with decreasing temperature, contradicting previous predictions.
New research predicts the existence of 80-100 additional satellite galaxies surrounding the Milky Way, orbiting at close distances. These 'orphan' galaxies are lost in most simulations but should have survived in the real Universe.
A new type of star-like object, called 'dark dwarfs', could help solve the universe's greatest mystery: dark matter. These objects are powered by dark matter and may be found at the center of our galaxy.
Researchers suggest our galaxy might sit in a large, local void that makes the cosmos expand faster here than elsewhere. The 'sound of the Big Bang' supports this idea by distorting baryon acoustic oscillations, which provide a standard ruler for charting cosmic expansion history.
Researchers propose 'dark dwarfs' could be key to understanding dark matter, with lithium-7 serving as a unique marker. A discovery of a dark dwarf would provide compelling evidence for WIMPs as a possible dark matter component.
Astronomers have detected a vast cloud of energetic particles surrounding one of the most distant galaxy clusters ever observed. This discovery reveals that entire galaxy clusters were immersed in high-energy particles for most of their existence.
Ryan Cooke and Max Pettini determined the D/H ratio to an accuracy of one percent, correlating it to the density of regular matter in the universe. Their measurement is in excellent agreement with a separate method, validating Big Bang Nucleosynthesis as a tool for precision cosmology.
The KATRIN experiment has achieved a precision measurement of the neutrino mass, setting an upper limit of 0.45 electron volts per square centimeter. This result is a significant reduction from previous measurements and demonstrates the experiment's ability to detect the elusive neutrino particles.
Researchers have calculated that star formation can occur in halos down to 10 million solar masses through molecular hydrogen cooling. This discovery has significant implications for our understanding of galaxy formation and the nature of dark matter.
The Dark Energy Spectroscopic Instrument (DESI) has released a new dataset containing information on 18.7 million celestial objects, including galaxies, quasars, and stars. This is the largest dataset of its kind ever shared, providing valuable insights into dark energy and the evolution of the universe.
The Atacama Cosmology Telescope (ACT) collaboration has produced the clearest images yet of the universe’s infancy. These new images show subtle variations in density and velocity of gases in the young universe, helping scientists answer longstanding questions about the universe’s origins.
Researchers discovered that the activity of place cells in large spaces follows universal mathematical principles, challenging long-held assumptions about neural circuits and spatial cognition. The findings suggest that randomness is key to encoding information about experiences.
The release of a unique Type Ia Supernovae dataset has significant implications for cosmologists measuring the universe's expansion history. The dataset, comprising 3628 supernovae, provides unprecedented precision and accuracy in exploring the properties of these events.
Researchers propose a new methodology to test the Universe's isotropy using Euclid space telescope data, aiming to detect potential anisotropies that challenge the Standard Model of Cosmology. If confirmed, these findings would open a new chapter in cosmology, potentially revising our understanding of the Universe's behavior.
A new machine learning approach developed by UCR researchers enables the detection of environmental patterns in large datasets generated by LIGO, improving data quality and reducing noise. This technology has potential applications in particle accelerator experiments and complex industrial systems.
Combining data from two major surveys of the universe's evolutionary history reveals a small discrepancy between expected clumpiness and observed matter distribution. This deviation could suggest unaccounted-for physics influencing cosmic structure formation, such as dark energy.
Researchers have developed a new approach to analyzing cosmic maps, known as field-level inference, which preserves the fidelity of the data and can improve the determination of cosmological parameters by a factor of 3.5 to 5.2 compared to standard methods.
The Hubble Space Telescope has completed a comprehensive survey of the Andromeda galaxy, revealing its structure and evolution on a holistic scale. The observations provide insights into the galaxy's age, heavy-element abundance, and stellar masses, helping astronomers distinguish between competing scenarios of merger history.
Priyamvada Natarajan has made groundbreaking contributions to understanding dark matter substructure, black hole formation, and their impact on the universe. Her work has laid the foundation for modeling black hole populations across the lifetime of the universe.
New measurements of the Hubble constant support a faster-than-expected Universe expansion rate, challenging current understanding of physics. A precise distance measurement to the Coma Cluster provides the foundation for this new result.
Researchers suggest that gravitational collapse in the early universe could give rise to incredibly dense point-like objects, namely visible or naked singularities. This ultra-strong gravity condition provides a unique opportunity to probe new fundamental aspects of physics, including quantum gravity. The possibility of PNaSs accountin...
The new Webb Space Telescope study confirms Hubble's expansion rate measurements, offering a crucial cross-check to address the mismatch in measurements. The discrepancy remains unexplained even by the best cosmology models, suggesting that our understanding of the universe may be incomplete.
A new paper in JCAP proposes a way to test the anthropic principle, which suggests the universe is fine-tuned for life. The proposal involves confirming three conditions: cosmic inflation, axion existence, and dark matter not being made of axions.
Astronomers have used the Hubble Space Telescope to study a quasar up close, revealing complex structures around a supermassive black hole. The observations show a mysterious L-shaped filamentary structure and small satellite galaxies falling into the black hole, offering insights into quasar formation and galaxy interactions.
Researchers have observed a rare metal-poor supernova, providing valuable information about the early universe. The study revealed that this supernova was distinct from others in nearby galaxies, with unique properties such as a steady brightness period and rapid spin.
A global research team led by UNF physics professors will develop a convergence framework to detect interactions between dark matter and ordinary matter. The project aims to test the feasibility of mineral detection, which could provide new insights into dark matter.
The European Research Council awards €12M to GWSky project, led by SISSA, to develop innovative tools for interpreting gravitational wave signals with great precision. The project aims to identify and understand possible anomalies in the signals, revealing new physical phenomena not predicted by Einstein's theory of General Relativity.
Researchers investigate universe expansion, Big Bang, black holes, and dark energy using a time-reversal model. They propose an explanation for the Big Bang and explore interior structure of black holes.
Researchers found evidence that black holes contain dark energy, which could explain its mysterious nature. The Dark Energy Spectroscopic Instrument provided data showing a correlation between the growth of black holes and the increase in dark energy density over time.
Dr. Kevin J. Kelly, an assistant professor at Texas A&M University, has received the Henry Primakoff Award for Early-Career Particle Physics for his significant contributions to neutrino physics and proposing novel directions for dark matter research. He will deliver an invited lecture on his research at a future APS meeting.
The latest DESI data reveals a dynamic behavior of dark energy known as quintom-B, which can be explained by modified gravity theory. This study suggests that dark energy may not be a cosmological constant in the traditional sense.
A recent study suggests that the observation of antihelium nuclei in cosmic rays may be consistent with the existence of WIMP particles, which could make up dark matter. The detection of two distinct isotopes, antihelium-3 and -4, is particularly intriguing as heavier nuclei are unlikely to be produced through natural processes.
A new study identifies regions where gravity dominates, such as the Sloan Great Wall and Shapley Supercluster, suggesting that our Milky Way likely resides in the larger Shapley basin. The research provides an unprecedented look into the gravitational landscape of the local Universe.
A newly discovered cluster-scale strong gravitational lens, the Carousel Lens, enables researchers to study cosmology and the properties of dark matter and dark energy. The unique alignment of seven background galaxies forms concentric circular patterns around a foreground galaxy cluster.
Physicists from Amsterdam and Copenhagen suggest that a careful analysis of merging black hole pairs' gravitational waves could reveal the existence of new ultralight bosons. This process, called superradiance, provides an opportunity to probe these particles, which may resolve puzzles in astrophysics and particle physics.
Researchers used the James Webb Space Telescope to confirm that supermassive black holes can stop their host galaxies from forming new stars. The team observed a massive galaxy 'Pablo's Galaxy' in the early universe, finding that its supermassive black hole is expelling gas at high speeds, starving the galaxy of fuel.
A new study proposes that early dark energy could explain the formation of numerous bright galaxies in the early universe, resolving the 'Hubble tension' puzzle. The team modeled galaxy formation with a brief appearance of early dark energy, finding it fits observations and solves both puzzles.
Positronium, an exotic atom composed of an electron and a positron, has been cooled to just 1 degree above absolute zero. This achievement could aid in studying the properties of antimatter and potentially unlock secrets of the universe.
Researchers, including WVU astronomer Emmanuel Fonseca, use radio pulsars to detect gravitational waves generated by massive objects. The study will merge data from the Green Bank Telescope and CHIME radio telescope to achieve full coverage of each wave, revealing information about phenomenon and objects in distant galaxies.
A new course launched with funding from the UK Space Agency to address the growing skills gap in software, data, and AI for the UK space sector. The Securing the future of space: Space Software and Data/AI CPD programme will equip mid-career professionals with expertise in AI and data-science.
Researchers at the Flatiron Institute and colleagues used AI-powered approach, SimBIG, to estimate five cosmological parameters with precision. The method significantly improved previous results, yielding less than half the uncertainty and closely agreeing with other estimates based on observations.
Recent discoveries from the James Webb Space Telescope's Cosmic Evolution Early Release Science Survey have cast doubt on the crisis in cosmology. Astronomers found that early galaxies were not as massive as initially thought due to the presence of black holes, which made them appear brighter and more massive than they actually are.
Researchers led by Katherine Chworowsky found that early galaxies were not as massive as initially thought due to black holes' influence. The study suggests that these black holes consume gas, emitting heat and light that makes the galaxies appear brighter than they really are.
Researchers at Argonne National Laboratory and Cornell University have developed a new method for measuring atomic strain in diamond using X-ray imagery. By correlating spin and strain properties, the team created an equation that relates these two phenomena, opening up new avenues for quantum sensing.
Scientists have discovered tiny, bright objects in the early universe that are packed with hundreds of millions of years old stars, defying conventional thinking about galaxy evolution. The objects also harbor surprisingly large supermassive black holes, estimated to be 100 to 1,000 times more massive than our Milky Way's black hole.
Scientists at Case Western Reserve University have discovered that the rotation curves of galaxies remain flat for millions of light years, defying expectations and challenging traditional understanding of cosmology. This finding suggests that dark matter may not exist or that alternative gravity theories could explain this phenomenon.
Researchers at USTC have detected two new exotic spin-spin-velocity-dependent interactions using solid-state spin quantum sensors. These findings provide valuable insights into fundamental interactions and could help explain observational facts in cosmology such as dark matter and dark energy.
Researchers at Johns Hopkins Medicine build a minimal synthetic cell that responds to external chemical cues, demonstrating symmetry breaking - a vital biological principle. The findings have potential applications in targeted drug delivery and environmental sensing.
Researchers used numerical simulations to analyze the behavior of dark matter in the giant galaxy cluster El Gordo. The study found that the physical separation between dark matter and other mass components can be explained using the Self-Interacting Dark Matter (SIDM) model.
FQxI appoints Pinar Emirdag to its Board of Directors, leveraging her financial technology expertise to support paradigm-shifting research and promote equity in science. Emirdag brings over two decades of experience working with global regulators and academics.
Scientists have developed a new method to efficiently extract information from galaxy surveys, enabling the use of high-order information in future studies. This breakthrough has significant implications for understanding dark energy, dark matter, and gravity.
Researchers used thermodynamics to describe the expansion of the Universe, finding that adiabatic and anisotropic effects are accompanied by cooling due to the barocaloric effect. The study proposes a novel way to investigate anisotropic effects associated with the expansion of the Universe.
A recent analysis by DOE/Argonne National Laboratory and NREL suggests that renewable energy could reduce carbon footprint at the South Pole. The study found that using solar energy during the austral summer could save approximately $57 million over 15 years.
Physicists calculated that neutron stars can heat up quickly due to energy transfer from dark matter particles, providing a potential way to detect dark matter. This process could reveal the nature of dark matter and its interactions with regular matter.
Researchers from the DESI collaboration have created a largest 3D map of cosmos ever constructed, measuring expansion history with precision better than 1%. The analysis confirms basics of Lambda-CDM model but hints at possible evolution of dark energy over time.
Researchers have created the largest 3D map of the cosmos, measuring dark energy with unprecedented precision. The study provides insights into the expansion history of the young universe, with results agreeing with the Lambda CDM model but also hinting at potential differences that could indicate evolving dark energy.
The American Physical Society's 2024 April meeting will feature approximately 1,700 presentations on various physics topics. The scientific program includes a public lecture on detecting gravitational waves with LISA and a special symposium on big questions for the next decade.
Researchers found that neural networks use a similar path to chart their way from ignorance to truth when presented with images, despite varying network designs and training recipes. This commonality holds the potential for developing more efficient image classification algorithms, reducing the computational power required by AI systems.
A new study by University of Ottawa physicist Rajendra Gupta challenges the existence of dark matter in the universe. Using the covarying coupling constants and tired light theories, Gupta's research finds that the universe does not require dark matter to exist.
The expansion rate of the universe is faster than predicted, according to NASA's Webb and Hubble telescopes. By combining data from both telescopes, scientists have ruled out measurement errors as the cause, suggesting that new physics may be at play.