Articles tagged with Galaxies
A team of researchers used a hybrid approach to track the growth of supermassive black holes, finding that accretion dominated growth in most cases. Mergers made notable contributions, especially for massive black holes over the past 5 billion years.
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.
Researchers analyzing James Webb Space Telescope data have pinpointed three galaxies actively forming at 400-600 million years old. These galaxies are surrounded by hydrogen and helium gas that will fuel star formation.
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.
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.
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.
The brightest gamma-ray burst (GRB) ever recorded was caused by the collapse of a massive star, according to Northwestern University researchers. Despite extensive searches, no evidence of heavy elements like platinum and gold was found.
A recent study has found that the age of a galaxy is the primary driver of the random motion of its stars. By analyzing data from the SAMI Galaxy Survey, researchers discovered that older galaxies tend to have more chaotic star motions, regardless of their environment or mass.
Astronomers have found a second-generation star in the Large Magellanic Cloud that formed in a different galaxy, offering clues about how elements were enriched in the universe. This discovery provides new hints about the early element-forming process and suggests that conditions may not be the same across all galaxies.
Astronomers have made unprecedentedly detailed observations of an early galaxy merger using the James Webb Space Telescope (JWST). The findings suggest that stars developed much faster and more efficiently than expected, contradicting current models of galaxy formation.
Researchers at Nagoya University discovered IVCs have lower heavy elements than previously reported, contradicting the Galactic Fountain Model. This finding suggests that particles in these clouds originated outside our galaxy, leading to new insights into galaxy evolution.
A Rutgers University astronomer has used the James Webb Space Telescope to create a detailed picture of the Wolf-Lundmark-Melotte galaxy, which contains ancient stars formed 13 billion years ago. The team's findings suggest that the galaxy experienced periods of intense star formation and cooling over its history.
A team of astronomers used JWST data to create detailed photos of nearby star-forming galaxies, revealing the intricate physics of cosmic dust. The study found consistent patterns in the distribution of diffuse gas across galaxies, suggesting universal principles in star and planet formation.
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.
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.
Astronomers identify AzTECC71 as a dusty star-forming galaxy, forming hundreds of new stars every year. The discovery suggests the early universe was much dustier than previously thought and may reveal a population of hidden galaxies.
Astronomers using the JWST have created the deepest spectrum of a distant galaxy ever seen, revealing the presence of eight distinct elements including nickel. The study helps scientists understand how galaxies mature and evolve over time, with surprising findings on the chemical composition of ancient galaxies.
Researchers confirmed the distance of two galaxies in Pandora's Cluster, which are larger than other galaxies at such extreme distances. The ancient galaxies offer insights into how the earliest galaxies might have formed and provide a window into the past.
Researchers observe complete process of dwarf galaxy evolution into ultra-compact dwarf galaxies, shedding light on their mysterious origins. About 15% of UCDs are surrounded by faint star halos, and they're highly correlated with strongly nucleated dwarf galaxies.
Researchers found almost 90% of early universe galaxies had glowing gas, triggering intense star formation. The James Webb Space Telescope provided unprecedented clarity to study these infant galaxies, revealing their role in shaping the Universe.
A new computer simulation of the early universe aligns with JWST observations, showing no discrepancy with theoretical expectations. The 'Renaissance simulations' track dark matter clumps and galaxy formation, consistent with models that dictate cosmic physics.
A new approach using deep learning speeds up supernova simulation by 99%, enabling more accurate modeling of galaxy evolution. This breakthrough could also apply to climate and earthquake simulations, providing valuable insights into complex phenomena.
Researchers from Trinity College Dublin are searching millions of star systems for technosignatures that could support intelligent alien life. The team has already scanned 1.6 million star systems but so far, no signals have been detected.
The GALAXY CRUISE project has published its first scientific paper, showing that colliding galaxies increase the rate of new star formation. Citizen astronomers helped classify over 2 million galaxies in data from the Subaru Telescope, enabling this groundbreaking research.
Scientists have observed 16 newly formed galaxies that exhibit significantly less heavy elements than expected, indicating a lack of time for element creation. The findings suggest that these galaxies are still in the process of being created, contradicting the long-held equilibrium model of galaxy formation.
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.
A new method using galaxy ellipticity and density has been developed to detect Baryon Acoustic Oscillations, allowing for more precise measurement of cosmological distances. This breakthrough opens new doors in astronomy, providing clues about the universe's history and composition.
Astronomers have confirmed that Maisie's galaxy is among the earliest galaxies detected by the James Webb Space Telescope. The galaxy, first spotted last summer, is estimated to be 390 million years after the Big Bang, making it one of the four earliest confirmed galaxies observed.
A new study by SISSA has identified the distribution of water vapour in galaxy J1135, which is 12 billion light years away. The researchers used gravitational lensing to observe this remote galaxy and ALMA observations to map its water distribution.
The NANOGrav team has detected a collective hum of gravitational waves from merging supermassive black holes, providing evidence for a background undulation in spacetime. The signal is thought to be generated by huge black holes at galaxy centers, producing low-frequency gravitational waves that oscillate slowly over years and decades.
Researchers using CSIRO's Parkes radio telescope have found strongest evidence yet for low-frequency gravitational waves, providing further insight into Einstein's general theory of relativity. The discovery, published in several journal papers, has also sparked collaboration among international teams searching for similar signals.
Astronomers discovered a new way to destroy stars, generating powerful gamma-ray bursts in the process. The study found that stellar collisions in dense environments surrounding supermassive black holes can create these explosive events.
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.
Astronomers have proposed a new method for measuring the distances of galaxies, utilizing double-period RR Lyrae (RR Lyr) stars. The study, published in Nature Astronomy, aims to improve the accuracy of distance measurements by leveraging the unique properties of these stars.
Researchers believe Earth's formation was facilitated by the accumulation of small pebbles, resulting in the presence of water as a byproduct. This new theory increases the likelihood of finding habitable planets outside our Solar System.
The latest DESI data release provides a precise 3D map of the universe with high certainty. The data also sheds new light on cosmic acceleration and the nature of gravity at large scales.
Researchers have detected complex organic molecules in a galaxy more than 12 billion light-years away from Earth. The study used the James Webb Space Telescope and gravitational lensing to observe the galaxy's atomic and molecular composition, revealing insights into the formation of galaxies, their lifecycle, and how they evolve.
A team of astronomers using the James Webb Space Telescope has detected complex organic molecules in a galaxy over 12 billion light-years away. The discovery suggests that the presence of these molecules does not necessarily indicate star formation, contradicting a long-held assumption.
Researchers at IAC propose that a mysterious trail of stars may be a galaxy without a bulge seen edge-on. The study finds surprising agreement with a local galaxy, IC5249, and suggests that the object behaves like a typical galaxy. This new theory simplifies the explanation for the phenomenon.
A team of scientists at MIT and elsewhere have observed a star engulfing a nearby planet, a phenomenon that will also befall Earth in 5 billion years. The star's outburst was followed by a colder, longer-lasting signal, indicating the presence of gas from the star condensing into dust.
An international research team explores ultra-fast gas emissions from active galactic nuclei, which significantly change galaxy ecosystems. The study confirms the existence of these powerful emissions and their role in regulating star formation.
Scientists identify tidal disruption event at infrared wavelengths, revealing the closest example of a black hole devouring a star. The discovery suggests that conventional X-ray and optical surveys may have missed similar events in young, star-forming galaxies.
A mobile application utilizing Python and a single-element ultrasound transducer has been developed for photoacoustic tomography (PAT) image reconstruction. The application successfully reconstructs high-quality images with signal-to-noise ratio values above 30 decibels, making it suitable for point-of-care diagnosis in low-resource se...
Astronomers have observed for the first time the shadow of a black hole and the powerful jet expelled from it in the same image. The new image shows how the base of the jet connects with the matter swirling around a supermassive black hole, allowing scientists to better understand how black holes create energetic jets.
Astronomers have captured new images of M87*, revealing a thicker, fluffier ring that is 50% larger than the initial image. The team detected plasma from an accretion disk and observed a relativistic jet blasting out from the black hole.
Astronomers have developed a more accurate method to measure the composition of galaxies using data from telescopes on Earth and in space. By correcting for temperature fluctuations, researchers found that the result from collisionally excited infrared lines is still 50% less than that from recombination line method.
A team of scientists from Kyoto University has confirmed that galaxy alignments can be a powerful probe for dark matter and dark energy. The analysis of 1.2 million galaxy observations verified general theory of relativity at vast spatial scales, providing strong evidence for gravity's role in shaping the universe.
Astronomers have mapped the M87 galaxy's 3D structure and determined its supermassive black hole has a mass of 5.37 billion times that of the sun. The galaxy's asymmetrical shape allows for more precise measurements, including the rotation rate of 25 kilometers per second around an axis 40 degrees from the long axis.
The HERA team has improved the sensitivity of a radio telescope, allowing them to detect radio waves from the cosmic dawn era. The data suggests that early galaxies contained few elements besides hydrogen and helium, unlike modern galaxies.
Scientists have created the first 2D map of wind patterns around a neutron star, revealing clues to galaxy formation. The map shows the wind's vertical structure and velocity, which is about 1 million miles per hour, and offers new insights into the influence of disk winds on galaxy evolution.
Astronomers have observed an extremely rare and aspherical Fast Blue Optical Transient (FBOT) explosion 180 million light years away. The explosion, similar to a flat disc shape, challenges scientists' current understanding of stellar explosions.
The Energy Circulation Theory (ECT) simulates the formation of galaxies with different shapes, such as disc, spiral, and elliptical ones. The study demonstrates that various galactic distributions result from stellar seed releases and galactic seed interactions.
Astronomers using JWST discovered that the atmosphere of exoplanet HD149026b, a 'hot Jupiter,' is super-abundant in carbon and oxygen, far above expectations. This finding provides insight into planet formation and suggests that giant planets may have varied atmospheric compositions.
Astrophysicists used AI to improve mass estimates of galaxy clusters by adding a simple term to an existing equation. The new equation downplays the importance of complex cores in calculations, providing more reliable mass inferences.
A team of researchers found the earliest evidence of heated gas in a galaxy protocluster, indicating temperatures characteristic of the present-day 'Warm-Hot Intergalactic Medium'. This discovery provides insight into the mechanisms that caused the intergalactic gas to boil up and offers a unique window into the early universe.
A new study reveals that intergalactic gas can activate and feed supermassive black holes at the heart of galaxies. The researchers found a direct connection between gas outside galaxies and active supermassive black holes, with misaligned gas playing a significant role in their growth.
An international team of astrophysicists has discovered six potential galaxies emerging in the universe's earliest moments, containing as many stars as the Milky Way. These ancient structures are gigantic and massive, contradicting current cosmological theory, with calculations suggesting they formed hundreds of new stars a year.
UC San Diego researchers study smallest dust particles in interstellar medium using JWST, gaining insights into star formation and ISM physics. High-resolution images reveal details of gas filaments and 'bubbles' blown by newly formed stars.
The James Webb Space Telescope has enabled the detection of compact structures of star clusters inside galaxies, known as clumps. Researchers have studied the link between clump formation and galaxy growth in distant galaxies, providing new insights into the early stages of galaxy formation.