Articles tagged with Galaxies
Recent study finds that galaxy clusters' density is smaller than predicted, and brightest cluster galaxies wobble, indicating a shallower central density. This suggests the existence of exotic forms of dark matter.
Yale researchers Darryl Seligman and Greg Laughlin have created a new model for understanding how black holes, planets, and galaxies emerge from the vortex-rich environments of space. They found that vortices may shed Rossby waves as they spin and that the number of orbits between two vortices is different in their model.
Scientists will use NASA's James Webb Space Telescope to study the creation of the universe's first galaxies and stars. With its powerful spectrographic instruments, Webb will see much more detail than imaging alone can provide, allowing scientists to study how gases transformed into stars in the first galaxies.
A new study finds a model universe with no dark energy provides a slightly better fit to Type Ia supernovae data than the standard dark energy model. The 'timescape cosmology' challenges current understanding of the Universe's expansion, highlighting the need for more data and better supernova precision.
A team of researchers at the University of Iowa suggests that black holes played a crucial role in making the universe visible. By ejecting matter violently, black holes may have pierced cloudy surroundings, enabling light from stars to escape. This theory is supported by observations of a nearby galaxy emitting ultraviolet light.
Researchers suggest black holes seen via gravitational waves spin slowly or rapidly, with tumbling behavior in dense environments; these findings provide new target for understanding black hole formation.
A study of over 300 galaxies found that heavier galaxies spin more slowly due to their mass, contradicting earlier theories. The research used the Sydney-AAO Multi-object Integral field spectrograph to measure galaxy rotation rates.
The Standard Model of cosmology has been tested to its limits by the Dark Energy Survey, with results showing that the universe clumps and expands as predicted by our best models. The survey's researchers analyzed light from 26 million galaxies to study how structures have changed over the past 7 billion years.
Researchers have produced new maps of dark matter dynamics in the Universe, revealing detailed information about matter streams and velocities. This study uses legacy survey data to build on previous research and provides insights into the nature of dark matter.
Researchers from HKUST and Harvard University found a connection between density distributions in the universe and the nature of smallest particles. They argue that the universe could be used as a 'collider' to explore new physics beyond the Standard Model.
Astronomers use gravitational lens to magnify light from distant galaxy, revealing two dozen clumps of newborn stars. This contradicts earlier theories suggesting larger star-forming regions in the early universe.
Astronomers observe how massive forces create shock waves in interstellar medium, leading to X-ray and radio emissions. The study provides insight into galactic proportions, allowing researchers to see event across electromagnetic spectrum.
A new study reveals that the largest galaxies in the universe have been aligned with their surroundings for at least ten billion years. The discovery suggests that these galaxies are especially sensitive to their environment and were influenced by their surroundings from a young age.
Researchers found a dying star that fizzled out and left behind a black hole, shedding light on why massive stars rarely explode as supernovae. The discovery could help explain the origins of supermassive black holes.
Astronomers have discovered a unique star in the constellation of Lacerta, which is millions of times closer to Earth than the galaxy NGC 7250, allowing it to overpower its light
Astronomers detected four images of the same supernova, a rare find, due to precise alignment with a foreground galaxy. This extreme case of gravitational lensing offers opportunities to study Type Ia supernovae and their role in cosmology.
Astronomers have captured images of a Type Ia supernova appearing in four different locations on the sky due to gravitational lensing. This rare event has opened up new possibilities for measuring the rate of the Universe's expansion with unprecedented accuracy and understanding the distribution of matter.
Researchers at the University of Waterloo have captured the first composite image of a dark matter bridge connecting galaxies. This achievement confirms predictions that galaxies are tied together through a cosmic web connected by dark matter, which has been largely undetectable until now.
Astronomers have discovered a distant galaxy, MACS1423-z7p64, which is about 13.1 billion years old and falls within the 'Epoch of Reionization.' The team used a giant lens in the sky to magnify its brightness and analyze its spectrum.
Researchers detect 75% of a typical galaxy's star formation obscured by dust, revealing surprising findings about the early universe. The Large Millimeter Telescope allows for deeper observations, pushing our knowledge of dust production and metal enrichment over cosmic time.
A new simulation model describes the formation of supermassive black holes in the early universe, proposing that massive gas clouds collapse directly to seed these behemoths. This alternative model, known as the Direct collapse black hole model, suggests that inefficient gas cooling is necessary for this process.
A study of galaxy properties in the cosmic web reveals that central galaxies form stars for a longer period than satellite galaxies. Satellite galaxies experience a steep decline in star formation activity due to 'ram-pressure stripping' as they fall into dense cluster environments.
A Yale-led team has created one of the highest-resolution maps of dark matter ever produced, providing a detailed case for its existence. The map, derived from Hubble Space Telescope Frontier Fields data, closely matches theoretical predictions and offers insights into the universe's structure and galaxy formation.
Swiss researchers use neural networks to challenge the resolution limit of telescopes, recovering features that were previously invisible. The technique, inspired by a generative adversarial network, achieves better results than previous methods, such as deconvolution, and has vast potential for future astronomical observations.
Research uses galaxy distribution and weak lensing to map cosmic web, finding that star-forming galaxies play a more prominent role in the distant universe. The study provides new insights into galaxy evolution and the structure of the cosmos.
The Caltech instrument, KCWI, will map gas flowing into and out of forming galaxies, revealing dominant modes of galaxy formation. KCWI is a versatile general-purpose instrument that can study cosmic objects in ways not possible before.
A team of astronomers led by Penn State's Niel Brandt has captured the deepest X-ray image ever obtained, revealing a treasure trove of supermassive black holes. The image, taken with Chandra observing time of about 11 weeks, shows that these massive objects grow in bursts rather than slowly accumulating matter.
Scientists measured the proportion of unstable particles in dark matter after the Big Bang, finding it was no more than 2-5%. This discrepancy can be explained by decaying dark matter hypothesis, suggesting dark matter decayed over time.
Astronomers discovered a rare event where a star was destroyed by a massive black hole's gravitational tides, producing an unusually bright flash of light. The event occurred in a distant 'red' galaxy with older stars, defying typical supernova models.
A team of astronomers from institutions around the world has processed images from the Kilo Degree Survey to make one of the most precise measurements ever made of cosmic shear, a subtle variant of weak gravitational lensing. The results suggest that dark matter in the cosmic web is less clumpy than previously believed.
Researchers have created a 3D printed map of the cosmic microwave background, providing a new way to visualize the oldest light in the universe. This innovation uses 3D printing technology to represent temperature differences as bumps and dips on a spherical surface, allowing anyone to appreciate the structure of the early universe.
Associate professor Chris Packham will use a $387,214 NSF grant to observe local galaxies and understand the nature of their central black holes. The project aims to uncover how these supermassive black holes influence galaxy formation.
Astronomers have discovered a rare gravitational lensing system dubbed the Eye of Horus, which offers a unique opportunity to probe the fundamental physics of galaxies. The system, consisting of two distinct background galaxies behind a foreground galaxy, provides valuable insights into galaxy interactions and cosmology.
The Hubble Space Telescope has explored the farthest objects in the universe, unveiling a warping-of-space phenomenon predicted by Einstein. The telescope has magnified images of galaxies much farther away, allowing astronomers to study the early universe and understand dark matter.
A team of physicists and astronomers has created the largest-ever three-dimensional map of distant galaxies to measure dark energy's effects on the universe's expansion. The Baryon Oscillation Spectroscopic Survey (BOSS) program reveals the structure of the universe over 650 cubic billion light years.
Scientists mapped 1.2 million galaxies in a 3D map to study the properties of dark energy and its impact on the universe's expansion rate. The map reveals the effects of dark energy, allowing astronomers to measure the amount of matter and dark energy in the present-day universe.
Researchers at UCL have created a new approach to simulate virtual universes, allowing for accelerated research into the effects of dark energy and dark matter. By comparing results from large studies to computational models, scientists can gain more accurate predictions and explore alternative versions of these mysterious substances.
Data from Japan's Hitomi X-ray satellite shows that supermassive black holes play a crucial role in the evolution of galaxies, regulating their growth by releasing energy that keeps plasma hot. This heat prevents galaxies from forming new stars and becoming even larger.
Astronomers have observed the early formation of galaxies and found that stars were forming inside them much faster in the past. The rapid star birth is using up more cosmic dust, which is becoming cleaner as the universe evolves.
Researchers used computer modeling to investigate galaxy colors and their relation to evolution. They found that rare green galaxies are likely at a critical stage of transformation from blue to red as they age. The study suggests that these galaxies' unique colors can provide insights into the processes driving their evolution.
Researchers detected gas containing oxygen in a galaxy 13.1 billion light years away, providing insight into ancient times. The discovery helps scientists understand the universe's reionization and the nature of its first stars.
For the first time, astronomers have detected billowy clouds of cold, clumpy gas streaming towards a supermassive black hole at speeds of up to 800,000 miles per hour. The observation provides direct evidence to support the theory that black holes feed on clouds of cold gas.
Astronomers refine universe's expansion rate with unprecedented accuracy, reducing uncertainty to 2.4 percent. The new value of 73.2 kilometers per second per megaparsec indicates the distance between cosmic objects will double in 9.8 billion years.
A team of researchers has discovered a new class of galaxies where supermassive black holes trigger powerful winds that prevent future star formation. These 'red geysers' lack young stars despite having abundant gas, and their outflowing winds heat surrounding gas through shocks, ultimately suppressing stellar birth.
A new class of galaxies called 'red geysers' has been discovered, hosting low-energy supermassive black holes that drive intense interstellar winds. These winds suppress star formation by heating up the ambient gas in galaxies and preventing it from cooling and condensing into stars.
Researchers confirm detection of faintest early-universe galaxy using gravitational lensing, shedding light on the cosmic dark ages. The discovery could help explain how these mysterious periods ended and has implications for our understanding of the universe's evolution.
The Instituto de Astrofísica de Canarias will participate in the SUNDIAL network, training young researchers in astronomy and computer science to understand galaxy formation and evolution. The network aims to detect ultradiffuse galaxies and apply research to society in medical imaging and remote sensing.
A team of researchers has created a 3D map of 3000 galaxies 13 billion light years away, finding that Einstein's general theory of relativity is still accurate. The study suggests the expansion of the universe could be explained by a cosmological constant.
A research team at Stockholm University used NASA's Fermi satellite to study light from the Perseus galaxy cluster, finding no traces of axion-like particles. The observations excluded certain types of ALPs that could explain a small amount of dark matter, advancing sensitivity for future experiments.
A research team using ALMA detected the faintest millimeter-wave source ever observed and found that they are responsible for 100% of the enigmatic infrared background light. 60% of these objects are faint galaxies, while the rest remain unknown.
Researchers found a massive star pretending to be a supernova, emitting X-rays consistent with a neutron star core. The system's unique pairing suggests it may be one of the rarest types of binary systems, offering insights into star formation and evolution.
ASTRO-H will observe X-ray sources like galaxy clusters and neutron stars up to 10 times fainter than its predecessor Suzaku. The observatory uses four co-aligned focusing X-ray telescopes and cutting-edge instruments to provide simultaneous coverage across its entire energy range.
A study published in Physical Review Letters shows that a galaxy cluster's formation history plays a role in its interaction with the surrounding dark matter halo. The researchers found that clusters formed from more dispersed galaxies were clumpier and interacted differently with their environment.
Researchers found that galaxy clusters' surroundings are shaped by their formation history, not just their mass. The study used gravitational lensing to confirm the connection between cluster mass and dark matter environment.
Online citizen science project Space Warps has made significant contributions to astrophysics, discovering 29 new gravitational lenses and a novel lensing scenario. The involvement of thousands of volunteer scientists has demonstrated the value of human pattern recognition in analyzing vast datasets.
Researchers discovered the most luminous supernova yet observed in an unusual host galaxy, providing insights into super-luminous supernovae. The record-breaking ASASSN-15lh was found to mimic hydrogen-poor SLSNe's behavior but with greater extremes, sparking speculation about its extraordinary emission.
Astronomers have found five objects with similar properties to the massive stellar system Eta Carinae, including a class of less massive stars. These discoveries were made using archival data from Spitzer and Hubble space telescopes, which identified key characteristics such as dust formation and infrared emission.
Researchers at the University of Leicester suggest that supermassive black holes can grow up to 50 billion solar masses before their gas discs collapse, starving them of fuel. Without a disc, the black hole would stop growing, marking a significant limit on its size.
A team of astronomers discovered the most detailed record ever of a Fast Radio Burst (FRB), indicating that it originated in a highly magnetized region of space. The research suggests a link to recent supernovae or active star-forming nebulae, significantly narrowing down the source's environment and type of event.
Researchers discovered the majority of missing ordinary matter in the universe, found in hot gas associated with intergalactic filaments. The study validates models of galaxy formation and could lead to a better understanding of heavy elements formed by stars since the beginning of the universe.