Articles tagged with Astrophysics
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.
A research team has successfully created and observed extreme conditions with a much smaller laser than before. They used a copper wire finer than a human hair to simulate the pressure and temperature of stars and planets, reaching densities eight times higher than normal copper and temperatures of 100,000 degrees Celsius.
Scientists found that a flyby of an alien star billions of years ago can explain the orbits of trans-Neptunian objects and the formation of irregular moons. The flyby caused some objects to be hurled into our solar system, which were then captured by giant planets as moons.
Researchers have developed a method using physics-informed neural networks to model the complex light scattering in exoplanet atmospheres. This breakthrough enables more accurate analysis of exoplanet atmospheres, particularly with regard to cloud influence and chemical composition.
Researchers unveil previously unseen properties of neutron stars through gravitational wave analysis, providing insight into internal composition and dynamic material properties. The study places observational constraints on viscosity within neutron stars.
Dr. Zewei Xiong has received an ERC Starting Grant to study collective neutrino oscillations in supernovae and neutron-star mergers. His project NeuTrAE aims to clarify lingering puzzles regarding neutrino flavor evolution, a crucial aspect of particle and nuclear astrophysics.
A new study uses observations from NASA's New Horizons spacecraft to measure the cosmic optical background, a phenomenon known as the universe's glow. The results suggest that the glow is roughly 100 billion times fainter than sunlight and provides valuable insights into the history of the universe since the Big Bang.
The EHT Collaboration has conducted test observations using ALMA and other facilities to detect light from distant galaxies at a frequency of around 345 GHz. The Collaboration achieved the highest resolution ever obtained from the surface of Earth, detecting details as fine as 19 microarcseconds.
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.
Simulations predict that the violent deaths of rapidly rotating stars can create detectable gravitational waves, which could aid understanding of collapsars and black holes. The signals from these events are strong enough to be picked up by LIGO and may already exist in datasets.
Researchers at Ohio State University have made the first direct observation of incredibly small time delays in a molecule's electron activity when exposed to X-rays. This breakthrough reveals complex interactions between electrons and other particles, shedding light on intricate molecular dynamics.
A new study published in Physical Review Letters suggests that nanohertz gravitational waves may not originate from supercool first-order phase transitions. Researchers found that such transitions would struggle to complete, shifting the frequency of the waves away from nanohertz frequencies.
A new study published in the Astrophysical Journal has found that galaxies in denser environments are up to 25% larger than isolated galaxies. Researchers used a machine learning tool to analyze millions of galaxies and found a clear trend: galaxies with more neighbors are also on average larger.
A team of researchers developed a new model that incorporates all necessary physical processes in planet formation, showing that annular perturbations can trigger the rapid formation of multiple gas giants. The results match latest observations and indicate more efficient and quick planet formation than previously thought.
Scientists find that magnetic field bends are absent inside the sun's corona, ruling out a key explanation for its high heat. The study suggests an indirect role of magnetic collisions in the formation of switchbacks and solar wind heating.
Researchers used hydrogen to track dark matter's presence in the universe, revealing a tension between observations and theoretical predictions. The findings suggest that an unknown particle or new physics may be responsible for this discrepancy.
A new study by Rice University's David Alexander and Anthony Atkinson extends the definition of a habitable zone for planets to include their star's magnetic field. Only two exoplanets, K2-3 d and Kepler-186 f, meet all conditions for potential habitability, suggesting that stellar magnetism is a crucial factor in determining planetary...
Researchers found that pairs of supermassive black holes can merge due to previously overlooked behavior of dark matter particles, proposing a solution to the longstanding final parsec problem. This discovery provides insight into the nature of dark matter and its interaction with supermassive black holes.
A team led by Jamie McCullough and Daniel Grün has analyzed the largest dataset to date, shedding light on what the color of various galaxies says about their true distance. The results make it possible to statistically determine the true distance of each galaxy observed in images taken by Euclid or the Dark Energy Survey.
Astronomers have discovered seven fast-moving stars in the Omega Centauri globular cluster, providing compelling evidence for the presence of an intermediate-mass black hole. The team analyzed over 500 Hubble images to search for signs of gravitational pull from the black hole.
Researchers at Lancaster University and others are building the most sensitive dark matter detectors using quantum technologies. They aim to detect dark matter particles weighing between 0.01 to a few hydrogen atoms, which could reveal the mass and interactions of these mysterious particles.
Scientists have developed a machine learning program that can identify blobs of plasma in outer space known as plasmoids. The program will analyze data from NASA's Magnetospheric Multiscale (MMS) mission to better understand magnetic reconnection and its effects on the electrical grid.
Researchers have proposed a new model explaining neutron star glitches, suggesting that the power-law behavior of glitch energies is due to the formation of twisted clusters of superfluid vortices. The study found that the exponent for the power-law behavior closely matched the observed data.
Researchers have discovered a hidden treasure in the Milky Way, identifying Cygnus X-3 as an ultra-luminous X-ray source. The use of X-ray polarized vision has revealed the configuration of dense matter surrounding the black hole, sparking new insights into extreme matter consumption.
New simulations show that neutrinos created during neutron star collisions can be trapped at the interface of merging stars and interact with matter for 2-3 milliseconds. This brief out-of-equilibrium phase is crucial in understanding the physics of these extreme events.
A new dataset from the VELOCE project has collected over 18,000 high-precision measurements of Cepheid radial velocities, providing insights into the structure and evolution of these stars. The data reveal complex patterns in pulsations that cannot be explained by traditional models, suggesting intricate processes within the stars.
A new study reveals that NASA's exoplanet-hunting satellite has observed the smaller black hole of a binary system directly for the first time. The discovery was made possible by the satellite's precise timing, which allowed researchers to detect a sudden burst of brightness from the smaller black hole.
The 2024 Kavli Prize Laureates have made significant contributions to our understanding of exoplanet atmospheres, nanoscale materials for biomedical applications, and the localization of brain areas specialized for face recognition. Their work has broadened our knowledge of planetary life beyond Earth.
Researchers uncover new clues about the early universe, finding spiral galaxies were prevalent as early as 2 billion years after the universe formed. This discovery challenges previous theories and provides insight into how spiral galaxies like the Milky Way formed over time.
A new study analyzing data from the Canadian Hydrogen Intensity Mapping Experiment (CHIME) found that non-repeating FRBs appear to come from galaxies with modest densities and magnetic fields. This contradicts previous studies focused on repeating FRBs, suggesting a separate population or evolved versions of the same population.
Astrophysicists record radio emissions from Earth and view it as an exoplanet to understand potential signals from intelligent life. The mission marks a major achievement for NASA's Commercial Lunar Payload Services program.
Astrophysicists calculate that two million years ago, the solar system encountered a cold, harsh interstellar cloud, which may have interfered with the sun's solar wind and affected Earth's climate. The heliosphere, a protective plasma shield, was compressed in such a way that it briefly placed Earth outside its influence.
Researchers suggest microscopic, ultradense black holes formed in first quintillionth of a second after Big Bang may have produced smaller, super-charged black holes with unprecedented nuclear charge. These tiny, 'super-charged' black holes could have influenced atomic nucleus formation and detection.
The newly discovered exoplanet, nicknamed Phoenix, has a surprisingly large and dense atmosphere, challenging current understanding of planetary evolution in extreme environments. Scientists estimate that the planet will survive for only 100 million years before dying due to its proximity to the star.
A team of researchers from NYU Abu Dhabi calls for expanded protections to preserve the environments of the Moon and Mars, addressing biological contamination and other issues. They also recommend compliance incentives to existing sustainability policies, citing potential benefits for terrestrial technology development.
Researchers witness the formation of three of the universe's earliest galaxies, 13.3-13.4 billion years ago, using the James Webb Space Telescope. The discovery contributes to understanding the universe's origins and provides insight into galaxy formation, shedding light on humanity's most basic questions.
Researchers uncover possible origins of sun's engine, the solar dynamo, which drives sunspots and solar storms. The study reveals that the dynamo may begin in the sun's outermost layers, contradicting decades-old theories.
Researchers at MIT have developed a new method to measure the spin of supermassive black holes by tracking the pattern of X-ray flashes produced during tidal disruption events. By analyzing the wobble of the accretion disk, they were able to determine that the nearby black hole was spinning at less than 25% the speed of light.
A new study suggests that the sun's magnetic field could arise from instabilities in the outermost layers of the sun, rather than deep within. This finding may enable scientists to better forecast solar activity and space weather.
The newly discovered SPECULOOS-3b is an Earth-sized, likely airless planet orbiting a nearby ultracool dwarf star. The planet's extremely close proximity to its star has likely vaporized any atmosphere, allowing scientists to study its surface composition and history in unprecedented detail.
Researchers have discovered three of the oldest stars in the universe, forming between 12 and 13 billion years ago. The team believes these 'Small Accreted Stellar System' (SASS) stars originated from small primitive galaxies absorbed by the Milky Way.
Scientists have discovered a new planet called WASP-193b that is 50% bigger than Jupiter yet has a density comparable to cotton candy. The planet's low density makes it an outlier among the over 5,400 planets discovered so far.
Scientists propose a new nucleosynthesis process, νr-process, which operates when neutron-rich material is exposed to high neutrino flux. This process can produce rare isotopes present in the solar system, including p-nuclei, previously poorly understood.
Astronomers have observed the faint light from stars in the host galaxies of three ancient quasars, revealing clues to how the earliest supermassive black holes and galaxies evolved. The study suggests that some of the earliest
Astronomers have discovered an enormous circular radio feature around a galaxy, dubbed the Cloverleaf, which was created by clashing groups of galaxies. The XMM-Newton satellite has detected X-ray emission associated with this structure for the first time, revealing clues about its formation and the merger process.
The new software can detect gravitational wave signals from neutron star collisions more accurately, allowing for faster alerts and enabling further research. This improvement will help scientists better understand heavy element production, including gold and uranium, and the behavior of neutron stars.
Researchers introduce a new model that suggests dense stellar clusters can eject pairs of giant planets, which remain gravitationally bound to each other as they float through space. This discovery fills a critical gap in our understanding of planetary evolution and challenges prevailing theories of planet formation.
Researchers led by Jackie Faherty detected methane gas and temperature inversions on W1935, a cold brown dwarf. The findings suggest possible aurorae similar to those on Jupiter and Saturn, possibly due to an active moon.
Astronomers have identified a massive stellar black hole with a mass of 33 solar masses, making it the most massive found in the Milky Way. The black hole is located at 2000 light-years away and was discovered using data from the European Space Agency's Gaia mission.
Scientists use Coulomb crystals to study ion-neutral reactions in the cold, low-pressure environment of the Interstellar Medium. They resolve chemical dynamics and identify products created in these reactions, shedding light on the makeup of cosmic space.
A massive ancient galaxy, JWST-ER1g, has been found to have a high dark matter density, puzzling physicists. Researchers offer an explanation that suggests a mechanism compressing the dark matter halo could be responsible for the high density.
Researchers at Kyushu University discovered that baby stars expel plumes of dust, gas, and electromagnetic energy in a phenomenon called 'interchange instability', releasing magnetic flux within the protostellar disk. This finding sheds new light on how baby stars develop and may be crucial for understanding star formation.
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.
The 3,200-megapixel LSST Camera will help researchers better understand dark matter and dark energy by observing the night sky in unprecedented detail. The camera's high resolution will allow it to resolve a golf ball from 15 miles away, providing valuable insights into the universe.
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.
Astronomers have discovered a new black hole behavior where a smaller black hole repeatedly punches through the disk of a larger black hole, releasing plumes of gas. The findings challenge conventional views on black hole accretion disks and suggest they may be more varied in their contents.
Researchers analyzed over 3,000 CSO candidates and found that these galaxies host supermassive black holes with compact jets that extend up to 1,500 light-years. The team concludes that CSOs have relatively short lifetimes of 5,000 years or less, fueled by tidal disruption events (TDEs) triggered by massive star consumption.
The Lunar Environment Monitoring System, developed by UMD researchers, will track seismic activity on the moon's surface during the upcoming Artemis III mission. The system's data will help prepare NASA for a long-term presence on other planetary bodies.
Researchers found that the Crow instability predicts the number and distribution of hydrogen gas clumps around supernovas, including SN1987A. The study suggests that the same mechanism responsible for breaking up airplane contrails may be at play, creating the 'string of pearls' effect.
Astronomers have discovered a significant amount of water vapor in the disc around a young star, located exactly where planets are thought to be forming. This finding provides new insights into the distribution of water in planet-forming discs and its potential impact on planetary formation.