Articles tagged with Astrophysics
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.
The new CLASS maps provide further insight into linear polarization, helping scientists study the Milky Way but also studying the early universe. The results significantly improve observations, allowing for a better understanding of the cosmic microwave background and its implications on the universe's origins.
A new study using NASA's Chandra X-ray Observatory and VLA data reveals that the supermassive black hole Sagittarius A* is spinning at about 60% of its maximum possible speed. This spin could provide an incredibly powerful kick to surrounding matter if the amount of material in the vicinity increases.
A new study by the Hebrew University introduces a flux-based statistical theory that predicts chaotic outcomes in non-hierarchical three-body systems. The theory offers a more efficient approach to analyzing complex systems, enabling deeper exploration and understanding of chaotic phenomena.
A new study found that black holes existed at the dawn of time and played a crucial role in galaxy formation. The research, using James Webb Space Telescope data, challenges classical understanding of black hole formation and suggests they may have dramatically accelerated star birth in the first 50 million years of the universe.
A team of MIT scientists has detected 18 new tidal disruption events (TDEs) using infrared observations, more than doubling the catalog of known TDEs. The discoveries reveal that these star-shredding black holes occur in a range of galaxies across the entire sky, not just dusty galaxies.
A team of MIT physicists analyzed Gaia and APOGEE data to find stars farther out in the galactic disk are rotating more slowly than expected. This flat rotation curve indicates a lower mass galactic core, potentially containing less dark matter than previously estimated.
The samples from Wild 2 comet have revealed a record of the solar system's dynamic formative years, shedding light on the events that shaped its history. Researchers have found unusual carbon-iron assemblages and precursors to igneous spherules in the comet material.
Researchers have discovered a novel galactic 'fossil' in the spiral galaxy NGC 4945, which sheds light on the evolution of galaxies. The X-rays outline giant clouds of cold gas that were blasted through the galaxy after its central supermassive black hole erupted 5 million years ago.
Researchers from Lehigh University have successfully mapped 15 orphaned stars to their birth clusters in the Milky Way using Gaia Mission data. The study provides new insights into the galaxy's history and star cluster dynamics.
The COSMIC project uses cutting-edge technology to search for extraterrestrial signals, exploring new frequencies and enhancing our understanding of the universe. With its adaptability and future upgrades, COSMIC may cover more stars and unlock new explorations.
Researchers from the University of Cambridge identified iron-bearing sulfate minerals as the cause of the mysterious UV absorption feature on Venus' clouds. The discovery was made possible by synthesizing and analyzing minerals under extreme chemical conditions.
A new study by Adam Frank and Amedeo Balbi suggests that high levels of atmospheric oxygen are necessary for the emergence of advanced technology on distant planets. They propose the concept of an 'oxygen bottleneck,' which implies that only planets with significant oxygen concentrations can develop technospheres, leaving detectable te...
Researchers have identified a population of massive stars stripped of their hydrogen envelopes by their companions in binary systems. These hot helium stars are believed to be the origins of hydrogen-poor core-collapse supernovae and neutron star mergers, shedding new light on a long-theorized phenomenon.
Astronomers studying two distant galaxies in the early universe reveal unprecedented molecular diversity, shedding light on the lives of prodigious star factories. By analyzing light from over 13 molecules, researchers gain insights into the physical and chemical conditions in these galaxies.
Researchers have uncovered a population of 25 intermediate-mass helium stars that bridge the gap in knowledge about hydrogen-poor supernovae. These stars were found using UV photometry and optical spectroscopy, with strong spectral signatures of ionized helium confirming their composition.
A new theory, self-interacting dark matter (SIDM), proposes that dark matter particles interact through a dark force, explaining high-density halos and low-density halos of ultra-diffuse galaxies. SIDM simulates cosmic structure formation with strong dark matter self-interactions, diversifying halo density in central regions.
A team of astronomers led by Durham University detected a rotating disc structure around a forming high-mass star in another galaxy, marking the first extragalactic detection. The disc is estimated to be around 15 times the mass of our Sun and provides insights into star formation across different galactic environments.
A new unified model confirms that some long-lasting gamma-ray bursts are created in the aftermath of cosmic mergers that spawn an infant black hole surrounded by a giant disk of natal material. The findings explain recently observed long GRBs that astronomers couldn't link to collapsing stars.
Researchers detect ultra-high-energy cosmic ray with an energy level comparable to the 'Oh-My-God' particle, raising questions about its origins. The Amaterasu particle's unusual properties are being further investigated through upgraded experiments and next-generation observatories.
A new study using CALET data finds evidence for nearby, young sources of cosmic ray electrons, contributing to a greater understanding of the galaxy. The study suggests that these high-energy electrons originate in supernova remnants, offering insights into the galaxy and its sources.
Physicists William Raphael Hix and John Lajoie were elected Fellows of the American Physical Society for their outstanding contributions to physics research. They are recognized for their work on explosive thermonuclear burning, stellar nucleosynthesis, and the development of advanced trigger systems that enabled the discovery of the q...
New studies show that giant gas planets in nearby star systems can prevent life on smaller, rocky planet neighbors by kicking them out of orbit and wreaking havoc on their climates. Researchers found that four giant planets in the HD 141399 system are likely to destroy the chances for life on Earth-like planets.
Researchers used seismic data to locate and identify a thin layer of molten silicates overlying Mars' metallic core. The discovery reveals a denser and smaller Martian core, aligning with other geophysical data and analysis of Martian meteorites. This finding provides new insights into how Mars formed, evolved, and became a barren planet.
Researchers at LIGO have developed a significant advance in quantum squeezing technology, allowing them to measure undulations in space-time across the entire range of gravitational frequencies detected by LIGO. This breakthrough boosts the observatory's ability to study exotic events and detect about 60 percent more mergers than before.
A global team has discovered the most ancient and distant fast radio burst, located 8 billion years ago, confirming that FRBs can be used to measure the 'missing' matter between galaxies. The source was found to be a group of merging galaxies, supporting current theories on the cause of fast radio bursts.
Researchers have created a three-dimensional computer simulation of the light emitted following a neutron star merger, producing results similar to an observed kilonova. The simulation takes into account various processes and material interactions, enabling predictions for any viewing direction.
Researchers observed and analyzed approximately 17,000 images from the Subaru Telescope to identify 13 extensive air showers. This new method can determine individual particle types, advancing understanding of these cosmic-ray phenomena.
Researchers confirmed that Maisie's Galaxy is at a high redshift of z ≈ 11.5 and disproved the existence of a previously thought-to-be-most-distant galaxy. The study also revealed another galaxy at a lower redshift, contradicting initial theories.
Astronomers using NASA's Neil Gehrels Swift Observatory discovered a black hole repeatedly nibbling on a Sun-like star in a distant galaxy. The object was detected using a new method for analyzing data from the satellite's X-ray Telescope, enabling it to adapt to new areas of astrophysics.
Astronomers have discovered a 'missing link' in the behavior of black holes and their impact on nearby stars. The discovery reveals that a low-mass black hole is consuming the equivalent mass of three Earths every time it passes close to a star, releasing massive amounts of X-rays.
Researchers detected distinct 'dwarf pulses' from PSR B2111+46 using the Five-hundred-meter Aperture Spherical radio Telescope. These narrow, weak pulses exhibit a rare reversed spectrum and are produced by one or a few particles generated by pair production in a fragile gap of the pulsar's magnetosphere.
Astronomers have created the first computer simulations showing how convection in the cores of massive stars generates waves that result in flickering starlight. The effect is different from the visible twinkling of stars in the night sky and could be observed with improved telescopes.
Researchers have discovered the coldest star yet to produce emission at radio wavelengths, with a surface temperature of 425 degrees centigrade. The ultracool brown dwarf is a rare find, as most do not emit radio waves due to their dynamics.
Astrophysicists analyze James Webb Space Telescope images to find three bright objects that might be 'dark stars,' powering themselves with annihilating particles of dark matter. The discovery could reveal the nature of dark matter and solve the puzzle of galaxy formation.
The Vlasiator model demonstrated that two central theories on plasma eruptions in near-Earth space are simultaneously valid: magnetic reconnection and kinetic instabilities. This finding helps understand how these events occur and improves the predictability of space weather.
Researchers at U.S. National Science Foundation's IceCube Neutrino Observatory reveal a galactic portrait made with particles of matter, unlike any before, by determining the origin of thousands of neutrinos. The breakthrough allows for the first 'ghost particle' image of the Milky Way galaxy.
Researchers with the NANOGrav collaboration have detected the gravitational wave background for the first time, revealing a perpetual chorus of ripples in space-time. The discovery is made possible by observing stars called pulsars that act as celestial metronomes.
A team of researchers using radio telescope observations found evidence of gravitational waves passing through the Milky Way, causing spacetime distortions that appear as variations in pulsar ticking rates. The discovery provides insights into how galaxies evolve and supermassive black holes grow and merge.
A recent study suggests that supermassive black holes at the center of large galaxies grew in size over billions of years, challenging previous estimates. The research, led by astrophysicist Joseph Simon, used computer simulations to predict the masses of massive black holes, revealing a diverse range of sizes across the universe.
Researchers have found a surprising correlation between global seismic activity and changes in cosmic radiation intensity, potentially aiding in earthquake prediction. The periodicity of this phenomenon has been identified as every 10-11 years, but its exact cause remains unknown.
The CALorimetric Electron Telescope (CALET) study found that the movement of cosmic rays is affected by the Sun's magnetic field, causing fluctuations in galactic cosmic rays reaching Earth. The research indicates that electrons are more susceptible to solar modulation than protons.