Articles tagged with Galaxies
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.
A team of scientists has successfully measured radiation leaks in star-forming galaxies, providing new insights into the formation of the first stars and galaxies. The breakthrough method uses a previously developed indicator, allowing researchers to study distant galaxies at longer wavelengths.
Astronomers using NASA's NuSTAR telescope have discovered a pulsar in the Cigar Galaxy, emitting energy about 100 times brighter than predicted. This finding challenges long-held assumptions about ultraluminous X-ray sources and may lead to re-evaluation of other objects previously thought to be black holes.
Researchers used simulations to study primordial supermassive stars that may have exploded as supernovae, leaving no black hole behind. This process could create a distinct observational signature detectable by upcoming telescopes and enrich their host galaxy with heavy elements.
Researchers have identified an unusual midsize black hole called M82 X-1, measuring around 400 solar masses. The study analyzed six years of RXTE data to detect specific changes in brightness that helped determine the object's mass.
A team of Australian astronomers has created a 'Google Street View' of the cosmos using a novel optical-fibre instrument. By analysing light spectra from 60 points in each galaxy, they can study gas and star movement, young star formation, and old star populations, gaining insights into how galaxies change over time.
Researchers used ALMA to detect molecular gas in two galaxies rocked by gamma ray bursts, finding it concentrated towards the galaxy centers. The gas was scarce near the explosions, which occurred in dusty environments with little gas present, suggesting intense star formation before the GRBs.
Dahl will build a new type of detector to study dark matter particles, while Stern will investigate quantum phenomena in two-dimensional materials. Their work has the potential to revolutionize our understanding of the universe.
Researchers have discovered a galaxy that magnified a background supernova thirtyfold through gravitational lensing, confirming their previous explanation for the anomaly. This discovery may significantly impact our understanding of cosmic expansion and the mysterious components of the Universe, including dark energy and dark matter.
A team of scientists observed a supernova in 2010 and proposed it was a new type of extra-bright supernova. However, further analysis revealed the presence of a lens that amplified the supernova's light, settling an important controversy. The discovery offers a means to test cosmic expansion using future lensed supernova events.
Numerical simulations charting the universe's forces in its first hundreds of millions of years reveal subtle effects governing galaxy evolution, including incomplete mixing and chaotic supernova ejections. The findings shed light on metal formation and distribution in the earliest galaxies.
A team of scientists has detected for the first time in an individual object the kinetic Sunyaev-Zel'dovich effect, a change in the cosmic microwave background caused by massive moving objects. The observation was made using the Caltech Submillimeter Observatory and confirms predictions of cosmological theory.
A team of astronomers has made a surprising finding about smaller black holes, discovering they can eat matter in an orderly fashion. The black hole in question is surprisingly lightweight and swallows its material at close to its theoretical limits, producing high-energy X-rays.
Researchers analyzed X-ray telescope observations from the Suzaku satellite to study iron distribution in the Perseus cluster. They found that iron is spread evenly between galaxies, suggesting it was created at least 10-12 billion years ago through intense star formation and supernovae explosions.
A team of astronomers from UC Riverside and three other universities will conduct a large survey of galaxies using the MOSFIRE instrument. The survey will study how galaxies evolved over time, including their conversion of gas into stars and the formation of heavier elements.
A UCLA/USC study finds that a patient-centered model with round-the-clock access and coordinated care improves patient satisfaction to 65% and physician satisfaction to 51%. The Galaxy Health program also shows promise for encouraging more medical school graduates to enter primary care.
Three unusually long-lasting stellar explosions discovered by NASA's Swift satellite represent a previously unrecognized class of gamma-ray bursts. Dying supergiant stars hundreds of times larger than the sun are likely the cause, producing powerful jets that propel matter at nearly the speed of light.
A team of scientists has identified a new type of gamma-ray burst that lasts for several hours, challenging previous theories. The ultra-long bursts are thought to occur in the violent death throes of a supergiant star, with a massive explosion taking time to propagate through the star.
Researchers found that Green Pea galaxies, compact and highly star-forming, may leak ionizing radiation. This could confirm the prevailing theory of reionization during the Big Bang's early stages.
The Planck satellite provides an unprecedented level of detail about the cosmic microwave background, confirming the standard model of cosmology at exceptional accuracy. Anomalies in the data suggest the Universe may be different on scales larger than those directly observable.
The Planck space mission has released its most accurate map of the oldest light in the universe, revealing a slower expansion rate and less dark energy. The new data also provide insights into dark matter and normal matter contents, challenging current models.
Researchers used NuSTAR to observe X-rays emitted by hot gas near a supermassive black hole, ruling out obscuring clouds and conclusively measuring its spin rate. The findings provide crucial clues about the fundamental relationship between black holes and their host galaxies.
Naveen Reddy, an assistant professor at UC Riverside, has been awarded a Sloan Research Fellowship to study the physics of early universe and extragalactic astronomy. The fellowship will support his research on faint galaxies in the distant universe.
NASA's Hubble Space Telescope has been providing amazing images of the universe since April 1990, while the next-generation James Webb Space Telescope will reveal mysteries of the universe in much greater detail. The new free e-Books offer interactive resources and insights into both telescopes' science and technology.
A team of Caltech astronomers used NASA's Hubble Space Telescope to discover seven primitive and distant galaxies, existing 13 billion years ago. The galaxies formed during the 'cosmic dawn' period, with their numbers steadily increasing over time, supporting the idea that first galaxies didn't form in a sudden burst.
Astronomers have discovered a previously unseen population of seven primitive galaxies that formed more than 13 billion years ago. The galaxies were observed using Hubble's Wide Field Camera 3 in near-infrared light, allowing researchers to study the early universe.
Astronomers have found that a merging galaxy cluster's 'dark core' does not appear to be over-dense in dark matter. The study uses improved Hubble camera capabilities to map the cluster's dark matter distribution, with a ratio of 2.5 to 1 of dark matter to normal matter, aligning with expectations.
Researchers suggest that small numbers of stars kicked to the edges of space during galaxy collisions may explain infrared light 'halos'. This theory proposes that only one-tenth of 1 percent of stars are distributed like dark matter, producing fluctuations in the cosmic background.
Two O-type stars in the Cygnus OB2 #9 binary system emit intense X-rays as their stellar winds collide during closest approach. The interaction reveals details about the stars' masses, luminosity, and orbits, shedding light on star formation and galaxy evolution.
The Dark Energy Camera, the most powerful sky-mapping machine ever created, has captured and recorded its first images in Chile. The camera will use data from the largest galaxy survey to study galaxy clusters, supernovae, and dark energy.
The Phoenix cluster holds the record for the fastest star formation rate in a galaxy cluster's center, breaking previous assumptions about cosmic evolution. The cluster's high star birth rate and rapid cooling of hot gas are expected to be short-lived due to unsustainable growth.
Astronomers have discovered a massive galaxy cluster, known as the Phoenix Cluster, that is breaking several important cosmic records. Stars are forming in this object at the highest rate ever seen in the middle of a galaxy cluster.
NASA scientist Maxim Markevitch is investigating a novel technique to build low-cost X-ray mirrors using plastic tape rolled like Scotch tape. The goal is to capture high-energy photons and study cosmic rays, which could reveal more about the birth and evolution of the cosmos.
The James Webb Space Telescope's NIRISS and FGS instruments, developed by University of Montreal's Professor René Doyon, will study the universe from a record-breaking distance. These Canadian-made instruments will analyze stars and galaxies dating back to the Big Bang and search for life-supporting planetary systems.
Researchers use Lonestar supercomputer to create nearly 100,000 models of one galaxy, representing the range of possible ways stars can move. They find that dark matter is more spread out at the edge of the galaxy than previously thought, with a fluffier distribution but the same total amount.
Astronomers found a rare gravitational arc behind an extremely massive galaxy cluster 10 billion light-years away, defying statistical expectations. The arc is the result of powerful gravity distorting light from a more distant galaxy, offering insight into the early universe's conditions for massive cluster growth.
New research reveals small planets can form around stars with low heavy element content, challenging previous assumptions. This discovery suggests Earth-like planets may be widespread in the universe, contradicting earlier theories on planetary formation requirements.
A new study using Chandra data reveals two galaxies with supermassive black holes growing at a rate outpacing their host galaxies. The findings suggest that dark matter halos and black holes are linked in the growth of these galaxies, contradicting previous assumptions.
Researchers at Arizona State University have discovered a faint infant galaxy 13 billion light-years away, revealing insights into the early universe's formation. The team, led by Sangeeta Malhotra and James Rhoads, identified the galaxy using a unique technique that allows for sensitive searches in infrared wavelengths.
The Musket Ball Cluster is a newly discovered galaxy cluster where so-called normal matter has been wrenched apart from dark matter through a violent collision. The system, observed 700 million years after the collision, provides valuable insight into the evolution of galaxy clusters and their member galaxies.
The South Pole Telescope's data analysis provides strong support for the cosmological constant as the source of dark energy, accelerating the universe's expansion. The results also place tight limits on neutrino masses, shedding light on these mysterious particles' properties.
Bahram Mobasher has received a two-year grant from NASA to compile imaging observations of galaxy surveys taken by the Hubble Space Telescope since 2002. The project aims to provide multi-wavelength data for measuring physical properties of galaxies and studying their formation and evolution.