Articles tagged with Galaxies
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.
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.
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.
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.
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.
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.
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.
Researchers developed a machine-learning simulation system to create accurate galaxy models, reducing computational time. The method uses algorithms to approximate properties from rare simulations, producing nearly identical galaxy distributions.
PhD student Elise Hampton uses AI to analyze thousands of galaxy spectra, identifying the most turbulent and messy galaxies. Her goal is to understand how galaxies form, live, and die, and how different processes compete in these galactic systems.
A team of Caltech researchers detects a galaxy called EGS8p7, which is more than 13.2 billion years old, making it the farthest galaxy ever found. The detection challenges our understanding of the universe's evolution, particularly reionization.
Researchers developed a new map of dark matter distribution using DES data, providing valuable tool for cosmology to answer questions about dark energy and dark matter. The mass map allows scientists to check their work and verify the relationship between galaxy distribution and dark matter density.
A new study led by Michigan State University suggests there may be fewer galaxies further out in the universe than previously expected. The research used simulations to examine galaxy formation in the early universe and found that the number of faint galaxies could be as low as ten times larger than initially thought.
A new study using high-resolution simulations suggests that there are far fewer faint galaxies than previously thought. The Renaissance Simulations, conducted on the Blue Waters supercomputer, show hundreds of well-resolved galaxies and provide novel predictions for the James Webb Space Telescope.
Astronomers have captured the most detailed view of star formation in a distant galaxy using ALMA's Long Baseline Campaign. The observations reveal giant versions of the Orion Nebula producing thousands of new stars, with clumps of star formation visible down to 200 light-years.
Recent research found that supernovas work hand-in-hand with supermassive black holes to sweep out gas, interrupting star formation in galaxies. The partnership of these celestial events may help understand why massive galaxies stopped forming stars billions of years ago.
The Dark Energy Survey has released a series of detailed maps of dark matter, created with the world's most powerful digital camera. The analysis will help scientists understand dark matter's role in galaxy formation and probe the nature of mysterious dark energy.
Researchers found that combining different photos of a user leads to better recognition on Samsung Galaxy phones, often to perfect levels. Storing an 'average' image formed by morphing together several photos can greatly improve performance.
Astronomers studied 72 large cluster collisions using Hubble and Chandra observations. They found dark matter continues straight through collisions without slowing down, interacting even less with itself than previously thought.
A recent study published in Science reveals that dark matter particles do not interact with themselves when galaxy clusters collide, contradicting the view that they consist of proton-like particles. This finding challenges a major theory and raises new questions about the nature of dark matter.
Researchers at Johns Hopkins University have captured rare split images of a distant supernova using the Hubble Space Telescope. The images, caused by gravitational lensing, provide insight into dark matter distribution and the expansion rate of the universe.
Astronomers have observed a distant star exploding four times due to a massive galaxy cluster, providing a rare opportunity to test Albert Einstein's General Theory of Relativity. The discovery also offers clues about the strength of gravity, dark matter, and dark energy in the universe.
A team of astronomers has discovered a distant star exploding as a supernova, with four images captured by NASA's Hubble Space Telescope. The unique alignment is due to the powerful gravity of a foreground galaxy embedded in a massive cluster, providing a rare opportunity to study dark matter.
A team of researchers has discovered a very distant galaxy that contains a large amount of dust, changing astronomers' previous calculations of how quickly the dust was formed. The discovery suggests that galaxies were enriched with dust particles containing elements such as carbon and oxygen, which could form planets.
Researchers at Kavli IPMU revealed that considering environmental effects is crucial for explaining dark matter halo distribution and evolution around galaxies. They confirmed the importance of higher-order nonlocal terms in simulations, allowing for more accurate predictions of dark matter halos' distribution.
A study finds that crowd science volunteers contribute significantly to research projects, but also highlights limitations and costs involved. The phenomenon has attracted interest from policy makers and scientific agencies.
A team of astronomers developed a simulation that produces galaxies with characteristics similar to observed ones, including mass, size, and age. The strong galactic winds in the EAGLE-simulation lead to lighter and younger galaxies with less star formation, mirroring real galaxy observations.