Articles tagged with Galaxies
The Gang of Four, including Davis, Efstathiou, Frenk and White, receives the prize for their pioneering use of numerical simulations to model the Universe's large-scale distribution. Their work, which began with a survey of 2400 galaxies in 1981, showed that observations were consistent with a simulated Universe based on cold dark matter.
Researchers found that up to 20% of the most distant galaxies appear brighter than they actually are due to strong gravitational lensing. This effect enables astronomers to detect more galaxies but requires correction to ensure accurate tallies.
Gravitational lensing distorts the view of very distant galaxies, making them harder to detect and study. The distortion can be as much as an order of magnitude, potentially boosting the number of visible galaxies by up to 10-30.
A CU-Boulder scientist is using data gathered by a world-class telescope flying aboard a modified Boeing 747 to observe a distant star-forming region. The Stratospheric Observatory for Infrared Astronomy (SOFIA) allows scientists to study stellar targets in wavelengths that can't be observed by ground-based telescopes.
Astronomers at UCI use the Herschel telescope to detect hundreds of new galaxies through cosmic alignment, revealing a whole new class of galaxies from the universe's early days. The discovery provides insights into star formation and galaxy size when the universe was young.
Scientists and engineers are using supercomputer models to simulate the universe's first stars, galaxies, and planets. Custom tools transform vast data into cinematic experiences, revealing insights into cosmic evolution and star formation.
Scientists have found the largest known galaxy cluster at a staggering 7 billion light-years away, holding hundreds of galaxies. This discovery provides crucial insights into dark energy's influence on cosmic structure growth.
The Mid-InfraRed Instrument (MIRI) is being tested in a simulated environment at RAL to prepare for its delivery to NASA. The instrument will enable astronomers to study the first light of the early Universe and form planets around distant stars.
Researchers found evidence of universal ubiquitous magnetic fields in deep space between galaxies with an average strength of femto-Gauss. These findings suggest that the magnetic fields may have formed shortly after the Big Bang, long before stars and galaxies formed.
A team of astronomers has confirmed the presence of an extreme ultra-luminous X-ray source in a nearby galaxy, which may indicate the presence of an intermediate mass black hole. The object, HLX-1, is located ~300 million light years from Earth and emits radiation 100 times brighter than most other objects in its class.
Young salmon and trout seek refuge in shallow waters due to competition from older fish, which can be mitigated by preserving such habitats. The study suggests that restoring shallow parts of watercourses with low-velocity flow is essential for the survival of young fish.
Using gravitational lensing, researchers probe elusive dark energy for the first time, improving current measurements of mass and energy content. The results narrow the range of estimates about dark energy's effect on the universe by 30 percent.
A team of astronomers from the University of Arizona developed a technique called laser adaptive optics, allowing for sharper images and faster data collection. This technology will enable scientists to study ancient galaxies and star clusters more efficiently.
A recent galactic survey suggests that ultralight neutrinos may be at most half as massive as initially estimated. The MegaZ DR7 map of over 700,000 galaxies indicates a reduced upper limit for neutrino mass.
The European Space Agency has received tiny microshutters, as small as human hair, which will focus the infrared camera on specific targets to the exclusion of others. These microshutters are a key component in the James Webb Space Telescope's ability to observe distant stars and galaxies.
New results from a galaxy survey set the smallest upper limit on the size of the elusive neutrino particle to date at 0.28 electron volts. The research uses a large 3D map of galaxies and cosmic microwave background radiation, providing insights into dark matter.
A new survey using ESO's Very Large Telescope discovered that most Lyman-alpha light is trapped within galaxies, making 90% of galaxies invisible to traditional surveys. This breakthrough highlights the limitations of current methods and paves the way for more accurate representations of the cosmos.
Particle No. 30, named Orion and Sirius, have been identified as the most likely interstellar candidates discovered to date. The discovery was made by a team of researchers using non-destructive X-ray analysis techniques.
A team of Princeton University scientists tested Albert Einstein's theory of general relativity at cosmic scales, concluding it works as well in vast distances as in local regions. They analyzed over 70,000 galaxies and demonstrated that the universe follows Einstein's rules up to 3.5 billion light years from Earth.
A new study led by Alexander Kashlinsky at NASA's Goddard Space Flight Center reveals that a collective motion dubbed the 'dark flow' persists to much greater distances -- as far as 2.5 billion light-years away.
A new study extends gravitational lensing to smaller, older structures, improving understanding of dark matter distribution. Researchers use x-ray emissions to pinpoint galaxy cluster centers and measure total masses.
The MIRI detectors will enable the Webb telescope to observe the earliest stars and galaxies in the universe, allowing scientists to study the formation and evolution of the cosmos. The new video showcases the technology behind MIRI and its potential for groundbreaking discoveries.
Researchers used a custom-made filter to find 22 early galaxies and confirmed the age of one at 787 million years post-Big Bang. The findings suggest that reionization likely began during this era, with star-formation rates significantly lower than expected.
The IBEX spacecraft reveals a 'ribbon' of intense emissions controlled by galaxy's magnetic fields, forcing scientists to reconsider basic assumptions about the heliosphere. This discovery may impact Earth's history and pose hazards to astronauts as galactic radiation levels change.
Dr. Rolf-Peter Kudritzki, University of Hawaii Institute for Astronomy director, has been awarded the Karl Schwarzschild Prize for his contributions to galaxy research. The prize recognizes his work on studying very bright stars in distant galaxies to understand their chemical composition and distance.
The James Webb Space Telescope's Integrated Science Instrument Module (ISIM) has arrived at NASA Goddard for testing, featuring four scientific instruments and a critical cryogenic structure. The ISIM will undergo rigorous qualification testing to ensure its ability to survive space and extreme cold.
Katherine Rhode's five-year NSF CAREER award will fund a wide-field imaging survey of globular cluster systems in giant galaxies up to 65 million light years away. The goal is to quantify properties and test theories on galaxy formation.
The NRL's Large Area Telescope has made significant discoveries about cosmic rays and high-energy particles. The telescope detected an excess of electrons striking its surface, leading scientists to suggest that a nearby pulsar could be the source sending these particles towards Earth.
Engineers at NASA Goddard and Northrop Grumman are simulating the handling of the telescope's mirror segments, which will be assembled into the Primary Mirror Assembly. The mock-up has already been beneficial in preparing for integration and test operations.
A team of astronomers has developed a new technique to discover supernovae at greater distances than previously known. This discovery allows for the examination of galaxies that form following supernova explosions, providing valuable information about their evolution.
Astronomers use ESA's XMM-Newton and Integral space observatories to study a magnetar outburst from the rare 'dead' star SGR 0501+4516. The outburst lasted over four months and released hundreds of smaller bursts, providing valuable insights into extreme matter conditions.
The Suzaku mission has detected X-ray-emitting gas at a galaxy cluster's outskirts for the first time, providing insights into how massive structures evolve. The study reveals the temperature and density of the gas out to the cluster's virial radius, where order turns to chaos.
The Cosmic Origins Spectrograph will explore the 'cosmic web', a rarefied network of hot gas lanes connecting galaxies, and map the structure of the universe. Astronomers hope to detail the evolution of the large-scale structure and understand how galaxies formed.
The Fermi telescope has detected a class of pulsars, probed gamma-ray bursts and watched flaring jets in galaxies billions of light-years away. The data may imply the presence of a nearby object beaming cosmic rays our way.
Tabetha Boyajian, a GSU astronomy graduate student, has been awarded the prestigious Hubble Fellowship to pursue postdoctoral research on stellar sizes and planetary systems. She will use the CHARA Array to measure the size of stars and determine their effective temperature, shedding light on the habitable zones of planets.
Astronomers have identified a triple merger of four separate galaxy clusters, the first time such a phenomenon has been documented. The galaxy clusters are involved in a cosmic free-for-all, with one collision after another occurring as galaxies pour into a region already full of galaxies.
Researchers found that the 'caustic curve' shape, seen in sunlight reflections on water or boat hulls, is connected to gravitational lensing effects in distant galaxies. The discovery could enable scientists to map dark matter clumps using caustic violations.
UK astronomers using NASA Swift Satellite captured an ultraviolet spectrum of a gamma ray burst just 251 seconds after its onset, marking the earliest ever recorded. This breakthrough allows for calculations of distance and brightness within hundreds of seconds and provides new insights into GRB causes and host galaxies.
Researchers harness supercomputing to recreate how galaxies form, develop, and collapse. The most detailed recreation of the universe's evolution to date is created using computer simulations that incorporate black hole physics.
Researchers at Durham University's Institute for Computational Cosmology created simulations to predict galaxy formation and dark matter effects. The work aims to improve understanding of dark matter, a mysterious substance making up 80% of the Universe's mass.
Astronomers have identified gas molecules in the host galaxy of a gamma-ray burst, providing insight into star formation when the universe was about one-sixth its present age. The study found hydrogen and carbon monoxide absorption lines, suggesting a thick molecular cloud similar to those that spawn stars in our galaxy today.
Researchers used data from NASA's Chandra X-ray Observatory and Compton Gamma Ray Observatory to study the Bullet Cluster, where two large clusters of galaxies collided. The results show that the antimatter fraction in the cluster is less than three parts per million, ruling out significant amounts of antimatter on scales of about 65 m...
Researchers identified an unexpected motion in distant galaxy clusters, suggesting gravitational attraction beyond the observable universe. The 'dark flow' is constant out to a billion light-years and flies in the face of predictions from standard cosmological models.
Astronomers study massive galaxies in clusters to understand their growth. The team observed four galaxy groups and found that three of them have a bright companion galaxy, indicating merging systems.
The James Webb Space Telescope sunshield, crucial to the mission's success, has completed its preliminary design review. The five-layer sunshield will deploy in space to shade the telescope optics and enable it to reach proper operating temperature.
Astronomers have measured the distribution and motions of thousands of galaxies in the distant Universe using ESO's VLT. This study provides a powerful way to tackle the mystery of dark energy, with results supporting the simplest form of dark energy.
For the first time, astronomers have directly visualized the distribution of dark matter in a supercluster, allowing for the detection of irregular clumps and detailed shapes. This breakthrough study, led by UBC researcher Catherine Heymans, uses NASA's Hubble Space Telescope to map the Abell 901/902 supercluster.
A new study using Chandra X-ray Observatory results provides evidence that many supermassive black holes are spinning extremely rapidly. The research suggests that these fast-spinning black holes can drive powerful jets, pumping energy into their environment and affecting galaxy growth.
Astronomers have detected a mysterious type of cosmic explosion, known as a short gamma-ray burst (GRB), 7.4 billion years ago, more than halfway back to the Big Bang. This discovery dramatically moves back the time at which we know short GRBs were exploding.
Astronomers have discovered a rare type of star system containing a black hole that suddenly began glowing brightly with X-rays. The system, dubbed CXOU J132518.2-430304, is thought to be a binary star system where one star collapsed to form a black hole.
Astronomers have detected a record-breaking short gamma-ray burst (GRB) 7.4 billion years ago, revealing new insights into their formation mechanisms.
A team of astronomers discovered a long-duration gamma-ray burst (GRB) in the middle of nowhere, thousands of light-years from the nearest galaxy. The GRB's afterglow was bright and fast-fading, but there was no dense gas or dust to absorb its light.
Astronomers analyze galaxy clusters and discover that dark matter, a mysterious invisible force, has an incredibly long lifetime. The research suggests that axions, a type of particle with extra dimensions, could be the culprit behind this prolonged existence.
Scientists at RIT have discovered that supermassive black holes can be thrown from galaxies at speeds of up to 4,000 km/s, significantly exceeding the escape velocity. The spin velocity determines the size and direction of the 'kick' or radiation recoil.
Astronomers discover a bright arc of extremely hot gas in a massive galaxy cluster, suggesting an exceptionally dramatic event, such as a collision between two clusters. The temperature and mass of the cluster make it a giant among giants, with a quadrillion suns' worth of mass bound by its hot gas.
Astronomers have used adaptive optics technology to pinpoint two supermassive black holes in a colliding galaxy. The observations reveal the black holes reside at the center of rotating disks of stars and are surrounded by young star clusters.
A team of astronomers has discovered a unique structure of dark matter in the galaxy cluster Cl 0024+17, with a ring shape unlike that of galaxies and hot gas. The discovery is among the strongest evidence for dark matter's existence, supporting theoretical models of its behavior under gravity.
Researchers used COSMOS field data to measure large-scale distribution of matter, revealing concentration of luminous and dark matter. The 3D map provides insight into the formation and evolution of galaxies and may shed light on dark energy.
The microshutters will enable scientists to block unwanted light from objects closer to the camera in space, letting the light from faraway objects shine through. This technology allows the telescope to focus on the faint light of stars and galaxies so far away, they formed early in the history of the universe.
Astronomers have created the first 3D map of the universe's dark matter distribution, revealing a web-like structure that confirms conventional theories on how galaxies formed. The map was derived from the Cosmic Evolution Survey and offers unprecedented detail on the large-scale filamentary structure of dark matter.