Articles tagged with Observational Astrophysics
Scientists have discovered the remnant material of an ancient star's explosion using innovative analysis of a quasar. The study suggests a 300-solar-mass first-generation star died in a 'super-supernova' explosion, leaving behind a distinctive blend of heavy elements.
Scientists have confirmed 68 strong gravitational lenses, transforming our understanding of galaxy evolution and dark matter. The discovery uses machine learning algorithms to identify thousands of potential lenses, opening a new window into studying mass distribution in distant galaxies.
A study reveals that global warming will impact major astronomical observatories worldwide, increasing temperature and atmospheric water content by 2050. This could lead to reduced observing time and quality in ground-based astronomy.
A new study by an international team of scientists has discovered a complex, dynamically evolving, magnetized environment around a fast radio burst source. The findings challenge current understanding and suggest that the source may be located in a region without significant star-forming activity, defying expectations.
Researchers propose using precision data from upcoming experiments to test the cosmological collider effect and unravel the mystery of matter's origin. They suggest that leptogenesis, a well-known mechanism, could be used to explain the imbalance between matter and antimatter in the early universe.
Researchers at the University of Birmingham have developed a new model to better understand the impact of oscillations in binary neutron stars on gravitational wave detection. This could significantly improve our understanding of neutron stars and their properties.
A team of researchers used sophisticated imaging algorithms to reveal a thin, bright ring of light created by photons flung around the back of a supermassive black hole. The photon ring, comprising increasingly sharp sub-rings, confirms theoretical predictions and offers new ways to explore these mysterious objects.
Astronomers have concluded that Betelgeuse blew its top in 2019, losing a substantial part of its visible surface and producing a gigantic Surface Mass Ejection (SME). The star is now slowly recovering from this catastrophic upheaval. The mass loss event is not necessarily the signal of an imminent explosion.
Betelgeuse, a bright red supergiant star, experienced a catastrophic Surface Mass Ejection (SME) in 2019, losing a substantial part of its visible surface. The star is now slowly recovering from this event, with astronomers using Hubble data to study the phenomenon and its effects on stellar evolution.
Astronomers have long sought the launch sites for high-energy protons in our galaxy, and NASA's Fermi Gamma-ray Space Telescope has confirmed that a supernova remnant is just such a place. The shock waves of exploded stars boost particles to speeds comparable to light, producing a tell-tale glow in gamma rays.
Researchers from the University of Bonn found that dwarf galaxies in one of Earth's nearest galaxy clusters show signs of disturbance without dark matter halos. The study's results contradict previous models, suggesting an alternative gravity theory might be more accurate.
Researchers used microwaves from the cosmic microwave background to measure dark matter distribution around distant galaxies. The findings suggest a different clumpiness measurement than predicted by the Lambda-CDM model, hinting at a possible flaw in the current cosmology theories.
The heaviest neutron star detected has consumed nearly all the mass of its companion, growing into a record-breaking object. The study provides constraints on matter's behavior at extreme densities, potentially excluding exotic states of matter.
A team of researchers found that the internal donut-shaped structure of quasars can affect the ionization level of intergalactic gas in different directions. The study suggests that a dust torus is likely to be responsible for this anisotropic effect.
Astronomers have found that denser and more turbulent environments tend to form binary/multiple stellar systems. The study used the James Clerk Maxwell Telescope and Atacama Large Millimeter/submillimeter Array to analyze the Orion Cloud complex, revealing that about 13 dense cores are giving birth to binary/multiple stars.
Researchers have detected a persistent radio signal from a far-off galaxy that repeats every 0.2 seconds in a clear periodic pattern, similar to a heartbeat. The source of the signal is unknown but may be related to a radio pulsar or magnetar, which could provide an astrophysical clock for measuring the universe's expansion.
A new Caltech project, COMAP, will peer beneath the 'tip of the iceberg' of galaxies to unveil a hidden era of star formation. The project aims to answer questions about what caused the universe's rapid increase in star production.
A team of Chinese and Australian astronomers has discovered direct evidence for binary common envelope evolution, a key process in star evolution. The observation provides a way to accurately characterize this process through direct detection.
Astronomer Frank Kiwy uses Astro Data Lab to discover 34 new ultracool dwarf binary systems in the Sun's neighborhood, expanding knowledge of brown dwarfs and their companions. The discovery nearly doubles previously known samples, shedding light on how often brown dwarfs have companions.
Researchers at University of Cologne and Masaryk University discovered a star, S4716, orbiting Sagittarius A* in just four years and reaching speeds of 8000 kilometers per second. The study sheds new light on the origin and evolution of fast-moving stars near black holes.
Researchers have detected the most distant galaxy rotation ever observed, suggesting an initial stage of rotational motion development. The galaxy's rapid rotation and small diameter provide valuable insights into its age and evolution.
A team of scientists used the flickering light of gas around a black hole to construct an accurate model of our galaxy's central black hole. They found that gas is directly infalling from large distances, rather than being siphoned off over time.
Asteroseismology helps determine mass, age, and features of stars in globular clusters, such as M4. A sample of 37 stars was analyzed, with most being red giants and others horizontal branch stars. The study provides an asteroseismic characterization of the stellar populations, shedding light on their origins and chemical characteristics.
Astronomers used the Gemini South telescope to capture high-resolution images of dusty disks around 44 young massive stars. The survey found that smaller star-mass systems have ringed structures, while more massive systems do not.
Researchers have discovered a new repeating fast radio burst, FRB 190520B, which exhibits extreme behavior similar to the initial discovery, FRB 121102A. The source has high ambient electron density and reliable bursting behaviors, suggesting it may be a 'newborn' with characteristics resembling a super luminous supernova.
A new study by the POLARBEAR collaboration provides a new correction algorithm that allows for almost double the amount of reliable data on Cosmological Gravitational Waves (CGWs), produced during Inflation in the early Universe. This enhances our understanding of the signal and brings us closer to observing CGWs.
A team of astronomers found that black holes played a crucial role in preventing rejuvenated star formation in massive quiescent galaxies. By analyzing the combined light from thousands of galaxies, they discovered a low-luminosity active galactic nucleus that may have heated the galaxy's gas, preventing new stars from forming.
Researchers have found that stars in distant galaxies are typically more massive than those in the Milky Way, changing our understanding of astronomical phenomena like black holes, supernovae, and galaxy death. This discovery may also explain why galaxies die and stop forming new stars.
Researchers found that planetary systems around binary stars form differently than those around single stars, potentially creating new targets for extraterrestrial life. The study also suggests that comets could play a key role in delivering organic molecules necessary for life.
A unique new instrument and powerful telescope allow researchers to peer into galactic nurseries at the heart of the young universe. The team used gravitationally lensed galaxies to observe two DLA clouds, determining their size and mass for the first time.
The Event Horizon Telescope (EHT) has captured the first image of Sagittarius A*, a black hole at the center of the Milky Way, revealing a ring-like structure and shadow. The observation confirms Einstein's theory of general relativity and provides new insights into giant black holes.
A team of University of Illinois researchers, led by Charles Gammie, has captured the first direct visual evidence of a supermassive black hole at the center of the Milky Way. The image reveals a dark central region surrounded by a bright ringlike structure, providing valuable clues about the workings of such giants.
A research team has observed an explosion on a white dwarf star for the first time, producing X-ray radiation. The explosion was detected by the eROSITA X-ray telescope and is believed to have occurred in a fireball of X-rays with a temperature of around 327,000 degrees.
Researchers from Finland, Canada, and Russia have discovered an unusual, hourglass-shaped dust trail of the comet 17P/Holmes. The particles that formed the dust trail were released by the most powerful outburst by a comet, with the authors developing a new model that realistically describes the evolution of cometary dust trails.
Researchers find that black holes go through a 'hard' and 'soft' state during outbursts, with the final flash possibly indicating a brief expansion of the corona. The findings help scientists understand how supermassive black holes shape galaxy formation.
Astronomers have used observations from the Hobby-Eberly Telescope to better understand how massive stars live and die. The study of supernova 2014C revealed a unique process where the hydrogen envelopes of two stars merged, forming a common-envelope configuration that shed light on the stellar explosion.
A Boston University–led team has won a major new grant from NASA to continue advancing its breakthrough work in heliophysics. The funding will also support the team’s efforts to diversify the field of space physics, with a focus on outreach and mentorship for underrepresented groups.
The Imaging X-ray Polarimetry Explorer (IXPE) mission enables new measurements of cosmic X-ray sources, such as pulsars, black holes, and neutron stars. With its state-of-the-art telescopes and detectors, IXPE will provide high-quality polarization data of various sources, including supernova remnants, active galaxies, and blazars.
Researchers used Chandra X-Ray Observatory to detect X-ray signatures of black holes in nuclear star clusters across 108 galaxies. The study found that above a certain mass and density threshold, these clusters emit x-ray signatures indicative of a black hole at twice the rate below the threshold.
Astronomers identify GNz7q, a dusty compact object with properties of both galaxies and quasars, born 750 million years after Big Bang. The discovery provides new insights into the rapid growth of supermassive black holes in early universe.
Researchers develop experimental platform to study mini-magnetospheres, observing effects of magnetic field on magnetopause and bow shocks. The platform combines Large Plasma Device with lasers and magnetic dipoles, allowing for controlled variation of parameters.
Researchers create high-power laser and foam ball to simulate supernova remnants and observe compression of molecular cloud material. This experiment demonstrates the potential for laboratory astrophysics to understand star formation mechanisms.
Astronomers have discovered the most distant galaxy candidate yet, named HD1, with a distance of approximately 13.5 billion light-years. If confirmed by observations with the James Webb Space Telescope, HD1 will be the most distant galaxy ever recorded.
Astrophysicists have witnessed the death throes of a red giant star named V Hydrae, which is expelling six slowly expanding molecular rings and an hourglass-shaped structure into space. The discovery challenges previous assumptions about star deaths, suggesting that the traditional model may be incomplete or incorrect.
Methane may be the first detectable indication of life beyond Earth, according to a new study that establishes conditions for biological activity. The researchers found that atmospheric methane is more likely to be considered a strong indication of life if it co-exists with carbon dioxide and lacks carbon monoxide.
Astronomers have identified a nearby Sun-like star that has paused its own cycles and entered a similar period of rare starspots, sparking hope for understanding the Sun's 70-year Maunder Minimum. Continued observation could provide crucial insights into the Sun's stellar magnetic activity, potentially affecting climate on Earth.
Researchers suggest that asteroid Ryugu could be a relic of an ancient comet due to its high organic content and spinning top shape. The study proposes a simple physical model that fits the observed data, suggesting that comets can leave behind rocky debris in the inner solar system.
Astronomers have found clues to the origin of fast radio bursts (FRBs) by analyzing polarization patterns. The team's findings suggest that every repeating FRB source is surrounded by a highly magnetized dense plasma, producing different rotation of the polarization angle as a function of frequency.
Researchers found that convection in the solar atmosphere can drive the formation of jets, similar to those caused by alligator mating calls. The discovery sheds light on the origin and nature of solar spicules, which are ubiquitous structures observed on the Sun's surface.
A team of researchers used the National Ignition Facility (NIF) to create a laboratory replica of galaxy-cluster plasmas, discovering strong suppression of heat conduction in these turbulent environments. The experiments provide insight into complex physics processes and raise additional questions that may be answered in future studies.
Researchers propose a new mechanism for eccentric black hole mergers, suggesting that interactions between three black holes in a flat disk environment could lead to chaotic orbits. This finding challenges previous studies on the rarity of such events.
The NICER telescope has observed the merging of multimillion-degree X-ray spots on the surface of a magnetar, providing new insights into their behavior. The observations suggest that the crust of a neutron star can become partially molten under magnetic stress, leading to changes in pulse shape and hot spot migration.
For the first time, astronomers believe they've spotted an afterglow from a kilonova, a phenomenon resulting from the merger of two neutron stars. The discovery was made using NASA's Chandra X-ray Observatory and has sparked debate over whether it's a kilonova or black hole-related X-rays.
A team of researchers detected a ring of planetary debris surrounding the white dwarf WD1054–226, suggesting a nearby planet may be present in its habitable zone. The study found that the debris is kept in a precise arrangement by a nearby planet's gravitational influence.
The detection of high-frequency gravitational waves would offer insights into the early Universe's phases, inaccessible to electromagnetic wave investigations. Currently, technological challenges limit the sensitivity of proposed projects to six orders of magnitude lower.
Researchers suggest LISA can detect scalar fields interacting with gravity, providing strong bounds on theories beyond General Relativity. Extreme Mass Ratio Inspirals offer a unique probe of the strong-field regime of gravity.
The UH-discovered Earth Trojan asteroid is the largest to date, offering valuable data on its orbital stability. Researchers conducted an observational study and analyzed the asteroid's photometric characteristics, shedding light on its properties.
Researchers discovered a complex relationship between Jupiter's magnetic field, volcanic activity on its moon Io, and the planet's powerful aurorae. The study revealed an electromagnetic 'tug-of-war' lights up aurorae in Jupiter's upper atmosphere.
The study reveals the presence of titanium oxide in the atmosphere of WASP-189b, a hot gas giant planet 322 light years from Earth. The researchers used high-resolution spectroscopy to analyze the exoplanet's atmosphere, finding a layered type of chemistry that suggests three-dimensional effects and winds play a crucial role.
Astronomers have found an intermediate-mass black hole in the Andromeda galaxy, one of only a few confirmed objects of its kind. The discovery sheds light on the formation of galaxies and provides insights into the population of black holes at the centers of low-mass galaxies.