Articles tagged with Galaxy Formation
Rachel Somerville's research focuses on creating computer models that simulate galaxy formation and evolution. Her work helps astronomers understand how galaxies first formed and how they continue to evolve in the contemporary universe.
Researchers led by Nicolas Lehner found large quantities of cool gas with low heavy element content surrounding modern galaxies. This gas has not been strongly processed through stars, providing a substantial reservoir for fueling continued star formation in modern galaxies.
Researchers studied 544 blue galaxies and found they gradually transformed into orderly disk-shaped systems, with increasing rotation speeds and organization. The study's findings contradict previous studies that examined only well-behaved galaxies.
Astronomers have discovered galactic winds measuring up to 2,500 km/s, driven by intense bursts of star formation, potentially shutting down galaxy star formation. Young, compact galaxies with high-velocity winds are rare and may be part of a common phase in galaxy evolution.
A team of astronomers has discovered a giant galaxy-packed filament in the universe, containing hundreds of galaxies spanning 8 million light-years. The filament is ablaze with billions of new stars and offers a unique opportunity to explore how galaxies evolve and merge to form superclusters.
Astronomers have gathered direct evidence of a supermassive black hole ripping apart a star that strayed too close. The team identified the victim as a helium-rich star in a galaxy 2.7 billion light-years away, providing insights into the harsh environment around black holes.
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.
Astronomers have discovered that galaxy halos are much larger and more massive than previously thought, with up to 90% of mass undetectable by previous instruments. The new data provides a detailed picture of the chemical structure, movement, and temperature of gases in the halo.
The Bolshoi supercomputer simulation, based on WMAP5 parameters, provides a powerful new tool for studying galaxy formation, dark matter, and dark energy. Initial studies show good agreement between the simulation's predictions and astronomers' observations.
Researchers at University of California, Santa Cruz and Institute for Theoretical Physics in Zurich simulate formation of massive spiral galaxy like Milky Way, resolving key features with high-resolution simulation. The result supports prevailing cold dark matter theory, which predicts galaxies form within dark matter halos.
A gamma-ray burst, GRB 090429B, has been identified as a potential candidate for the most distant object in the universe at an estimated distance of 13.14 billion light years. The burst was detected by NASA's Swift satellite and is believed to be extremely likely, with a 99.3% chance, to be the most distant cosmic explosion.
The Milky Way belongs to a rare subset of galaxies with two satellites as bright and close by as the Large and Small Magellanic Clouds. Researchers analyzed over 20,000 galaxies similar to the Milky Way using the Sloan Digital Sky Survey data.
The Expanded VLA is providing new insights into the formation of sun-like stars, with observations revealing previously unseen detail of molecular gas near a very young star. The telescope's improved quality is also helping researchers study large ejections of matter from massive young stars and their role in galaxy evolution.
Researchers found that just four percent of galaxies are similar to the Milky Way, with two satellites as bright and close by as the Magellanic Clouds. The study used data from the Sloan Digital Sky Survey and computer simulations to understand how the Milky Way fits into the broader context of the universe.
Researchers have discovered a thick stellar disc in the Andromeda galaxy, composed of older stars with distinct chemical and orbital properties. This finding sheds light on the formation and evolution of spiral galaxies like our own Milky Way.
Astronomers Andrey Kravtsov and Nick Gnedin's simulations reveal why galaxies were less efficient at making stars in the early universe. The team's model explains the connection between dust, gas, and star formation, shedding light on the evolution of spiral galaxies.
Researcher Stelios Kazantzidis uses Ohio Supercomputer Center's powerful systems to model galaxy mergers and simulate the formation of massive black holes. His work has potential to shed light on astrophysical phenomena and verify general relativity.
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.
A team of astronomers has discovered that young galaxies can grow by sucking in cool streams of hydrogen and helium gas, forming new stars. This process, known as accretion, provides a gentler alternative to galaxy mergers, which are thought to be the primary mechanism for galaxy growth.
Researchers at Durham University use huge computer simulations to recreate the beginnings of the Milky Way, finding that many ancient stars originated from smaller galaxies torn apart by galaxy collisions. The simulations provide a blueprint for galaxy formation and reveal clues to the early history of the Milky Way.
Charles Steidel receives the 2010 Cosmology Prize for his revolutionary studies of distant galaxies, opening a direct observational window to the universe's early age. His work has allowed us to witness the dramatic transformation galaxies undergo throughout their lives.
The Hubble Multi-Cycle Treasury Program will survey the first third of cosmic time, observing over 250,000 distant galaxies to understand galaxy formation and evolution. The project aims to study the earliest stages in the formation of supermassive black holes and find distant supernovae important for understanding dark energy.
Researchers at Durham University have discovered a massive explosion that halted star birth in an early galaxy. The blasts scattered gas needed for new stars, regulating the galaxy's growth.
Researchers from Queen's University are making progress in detecting dark matter using the Cryogenic Dark Matter Search experiment. The team, led by Professor Wolfgang Rau, has observed two events with characteristics of an interaction involving a dark matter particle, but further analysis is needed to confirm the results.
Dr Andrew Benson and Dr Nick Devereux's research reveals the evolutionary history of the universe, explaining galaxy shapes and numbers. Their 'Lambda Cold Dark Matter' model suggests that dark matter haloes drive galaxy evolution, with elliptical galaxies resulting from multiple mergers.
Astronomers using Hubble Ultra Deep Field have discovered the most distant galaxies in the universe, dating back 13 billion years. The findings provide key insights into the formation of galaxies and the early universe.
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.
A new study led by CU-Boulder suggests that the first large black holes in the universe formed and grew inside gigantic, starlike cocoons. These cocoons likely prevented surrounding gases from being blown away and smothered powerful x-ray radiation.
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.
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.
A team of astronomers has found a sample of massive galaxies with properties suggesting they may have formed recently, running counter to widely-held beliefs. The discovery challenges our understanding of galaxy formation and evolution, offering new opportunities for research into the origin and early history of galaxies.
Astronomers have identified a new type of dwarf galaxy, formed out of pristine gas without dark matter. Led by Johns Hopkins University, the discovery was made using the Galaxy Evolution Explorer and suggests that these galaxies may be common throughout the early universe.
Sandra Faber is being honored for her extraordinary advances in understanding the properties of distant galaxies, dark matter, large-scale structure, and black holes. Her innovative leadership has driven significant discoveries in modern cosmology, including the role of dark matter in galaxy formation.
Astronomers have discovered star birth within a cloud of primordial gas, known as the Leo Ring, which lacks dark matter and heavy elements. This finding suggests that new galaxies may have formed through a distinct process, potentially providing insight into the early Universe.
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.
In a groundbreaking study, scientists have discovered that stars were forming at an incredible rate in the core region of an infant galaxy. With a diameter of just 4000 light-years, the star-forming core of J1148+5251 is incredibly productive and reaches its physical limit.
SkyView's latest survey is now available in WorldWide Telescope, with visitors generating 300,000 images a month, up from 20,000 ten years ago. The project provides a single interface for accessing over 36 surveys covering nearly 100 wavelength bands, making astronomy accessible to everyone.
Astronomers have discovered a rare event in the life of a distant quasar, marking the first time a huge flow of gas has been seen coming from one. This observation sheds light on how quasars come into being and may hold clues to galaxy formation.
A Yale University astrophysicist has discovered an upper mass limit for black holes, which appear to curb their growth at around 10 billion times the mass of our Sun. This finding has implications for the study of galaxy formation and suggests that black holes may play a key role in regulating star formation.
A team of Caltech astronomers reveals that spiral galaxies have more bars than previously thought, with most forming in smaller, low-mass galaxies. The study suggests that bars play a crucial role in galaxy evolution, fueling new star formation and feeding massive black holes.
Researchers used XMM-Newton to observe four polar BAL quasars, finding two of them emitted more X-rays than anticipated, suggesting a lack of absorbing gas. This discovery may indicate that BAL quasars are more complex than initially thought, with both equatorial and polar outflows potentially occurring simultaneously.
The galaxy proto-cluster LBG-2377 is the farthest ever detected, offering a glimpse into the universe's infancy when its light was emitted. Scientists believe it may grow into a massive galaxy cluster, born from a catastrophic event with gas and matter collapsing.
The Giant Magellan Telescope will be constructed at Cerro Las Campanas, Chile, providing unparalleled seeing quality and access to the southern skies. The telescope will help answer scientific questions on planetary systems, star formation, galaxies, black holes, dark matter, and dark energy.
The BHCosmo simulation reveals the integral role of black holes in galaxy formation and cosmic evolution. It provides a deeper understanding of quasar formation and helps predict where to aim future telescopes for early cosmic events and galaxy structures.
Researchers used Hubble Space Telescope to reveal a large elliptical galaxy with hundreds of globular clusters at an unprecedented 1 billion light-year distance. The discovery provides insights into the age, origin, and evolution of these clusters.
Researchers used Hubble Space Telescope to explore galaxy formation during first 900 million years after Big Bang. They found a significant increase in bright galaxies around 13 billion years ago, providing evidence for hierarchical theory of galaxy formation.
A new study has found that deuterium, a heavy form of hydrogen, exists in greater amounts than anticipated in the Milky Way galaxy. This discovery could fundamentally alter our understanding of star and galaxy formation.
A Cornell University study reveals that galaxies in the early universe tend to cluster near large clumps of dark matter. The research uses data from the Spitzer Wide-area InfraRed Extragalactic survey and confirms that ultraluminous infrared galaxies are precursors to galaxy clusters.
The RAVE survey has released its first dataset, containing information from 25,000 stars born when the Milky Way was in its infancy. The data will allow astronomers to test ideas of the galaxy's origins laid out by various cosmological theories.
Astronomers detect a vast hot halo extending over 60,000 light years around the massive spiral galaxy NGC 5746. This discovery resolves a long-standing issue in galaxy formation theory, suggesting that large spiral galaxies should be immersed in halos of hot gas left over from the galaxy formation process.
Researchers used simulations to show that dark matter halos are detectable in disk galaxies, but their absence in elliptical galaxies can be explained by the merger process. The study provides new insights into the formation and evolution of elliptical galaxies.
A team of astronomers has discovered a large population of galaxies formed between 9 and 12 billion years ago, contradicting previous estimates that the Universe had not yet formed many stars in the first billion years. The findings suggest that stars formed two to three times faster than previously thought.
The Millennium Simulation uses sophisticated modeling techniques to recreate evolutionary histories for 20 million galaxies and supermassive black holes. The simulation demonstrates that a few massive black holes can form early enough to account for rare quasars, and provides a new tool for understanding the nature of dark energy.
The Millennium Run simulation recreated evolutionary histories for 20 million galaxies and supermassive black holes, clarifying physical processes underlying galaxy buildup. The study also demonstrated that characteristic patterns imprinted on matter distribution at early epochs are still present in observed galaxy distributions.
Simulations show that growing black holes release a blast of energy, powering strong winds that prevent material from falling in, inhibiting further growth. This process links black hole mass to the total mass of stars in galaxies, explaining observed phenomena and promising deeper insights into galaxy formation.
CU researchers report consistent pattern in deuterium abundance, suggesting smaller amount of chemical evolution and higher infall of near primordial gas to the Milky Way galaxy. The findings provide a better understanding of galactic chemical evolution and its impact on the formation of stars, planets, and life.
Astronomers have found evidence of rapid galaxy formation in the early universe, including ultra-massive black holes and mature galaxies that formed at an unprecedented rate. This discovery poses a significant challenge to the cold dark matter theory, which predicts galaxies formed through a bottom-up process.
The Gemini Deep Deep Survey reveals that a large fraction of stars in the Universe are already in place when the Universe was young, contradicting existing models. The survey provides a comprehensive sample of galaxies in the Redshift Desert, revealing more metal-rich galaxies than expected.
Astronomers have discovered that distant galaxies in the early Universe will evolve into massive elliptical galaxies through rapid merging of smaller building blocks. The SCUBA camera images show these galaxies caught in the throes of formation, with star formation driven by mergers of older galaxies.
Scientists discovered a tiny dwarf galaxy in intergalactic space that was previously overlooked. The galaxy is believed to have formed elements through supernova explosions, enriching the gas cloud. This finding suggests that tiny galaxies may have played a significant role in the chemical evolution of the universe.