Researchers at CU Boulder explore galaxy NGC 6240 with two supermassive black holes, revealing how stellar winds and black hole winds combine to power down star formation. The study creates a massive cloud of gas in the shape of a butterfly, significantly impacting the galaxy's evolution.
The Hubble Space Telescope has imaged a massive galaxy cluster, revealing its intricate structure and the presence of dark matter. The cluster is comprised of thousands of galaxies held together by gravity, with most of its mass existing in non-luminous dark matter.
A team of astronomers has found that galaxies like the Milky Way are slowly increasing in size due to star formation on their outskirts. The study, led by Cristina Martínez-Lombilla, reveals a growth rate of around 500 meters per second, which is fast enough to cover the distance from Liverpool to London in about twelve minutes.
Researchers discovered a unique galaxy, NGC 1052-DF2, lacking most of its dark matter. The galaxy is as large as the Milky Way but contains only 1/200th the number of stars, leading to its classification as an ultra-diffuse galaxy.
Researchers found a galaxy with almost no dark matter, challenging the long-held idea that galaxies start with dark matter halos. The team discovered 10 globular clusters in NGC1052-DF2, which could account for all the mass in the galaxy.
Researchers have discovered a galaxy that is almost completely devoid of dark matter, forcing them to rethink the formation of galaxies. The team found that the stars in NGC1052-DF2 can account for all its mass, leaving little room for dark matter.
Researchers using Hubble Space Telescope have discovered a galaxy with minimal to no dark matter, contradicting long-held assumptions about its presence in galaxies. The ultra-diffuse galaxy NGC 1052-DF2 contains at least 400 times less dark matter than predicted for a galaxy of its mass.
Scientists have found a unique galaxy that contains almost no dark matter, a finding that challenges the standard ideas of how galaxies work. The galaxy, called NGC1052-DF2, has a mass similar to that of the Milky Way but only a fraction of the expected dark matter.
Researchers from multiple institutions developed the largest-ever hydrological simulation of galaxy formation, expanding on their 2015 'Illustris' simulation. The new model includes a more precise accounting for magnetic fields and improves understanding of black hole physics, shedding light on star formation limits.
The Hubble Space Telescope has discovered a rare relic galaxy, NGC 1277, that remains unchanged for the past 10 billion years. This unique find provides valuable insights into the origin and evolution of galaxies billions of years ago.
Researchers found that the chemical compositions of halo stars match those of outer disk stars, suggesting they originated from the galaxy's own disk. This discovery reveals a more complex dynamics of the Milky Way, indicating that groups of stars in the disk can be relocated to distant realms within the galaxy.
Astronomers have created the first high-resolution map of magnetic field lines around a black hole at the center of our galaxy. The map, produced using CanariCam infrared camera, reveals intricate details about gas and dust swirling around the supermassive black hole.
Astronomers discover halo structures in Milky Way, finding chemical compositions matching those of the Galactic disk. Theories suggest oscillations of the disk as a whole may have relocated these stars to extreme positions.
Researchers observed CO gas associated with the galactic disk, but found it unaffected by the strong ionized gas outflow from the galactic center. This challenges the widely accepted idea that radiation from galactic centers influences molecular gas and star formation activities.
Researchers have discovered that the Milky Way and Andromeda galaxies are roughly the same size, with Andromeda being 800 billion times heavier than the Sun. This finding challenges previous estimates of dark matter in the Andromeda galaxy and suggests that scientists may need to revise their understanding of the local group.
Researchers found that 14 out of 16 satellite galaxies of Centaurus A orbit in a single plane and rotate coherently. This synchronized movement contradicts standard cosmology simulations, suggesting flaws in current theories of galaxy formation.
A team of astronomers from the University of Basel has found that satellite galaxies around Centaurus A co-rotate within disc-shaped planes, a phenomenon that challenges the standard model of cosmology. This discovery suggests that these systems are not isolated cases but part of a widespread pattern.
Astronomers detected methanol, dimethyl ether, and methyl formate in the Large Magellanic Cloud, a chemically primitive galaxy. The findings suggest that complex organic molecules can form in early galaxies, potentially leading to life.
The largest X-ray galaxy cluster ever discovered contains the mass of three million billion suns and is composed of two colliding clusters, with most mass hidden in dark matter. Hubble's observations also show that the hot gas is being torn from the dark matter during the collision.
The discovery of eleven new stellar streams in the Milky Way confirms its role as a cosmic melting pot, with stars originating from other galaxies. The Dark Energy Survey data, made publicly available, enabled the detection of these streams, which provide evidence for the galaxy's history of migration events.
Researchers found supermassive black holes prevent star formation in smaller galaxies by driving powerful winds that heat gas, quenching the process. This discovery sheds light on how dwarf galaxies, composed of up to 100 million stars, evolve and affects our understanding of galaxy evolution.
An international team has discovered an 'astonishing' overabundance of massive stars in the Large Magellanic Cloud galaxy. The study used detailed analyses of nearly 1,000 massive stars to determine their distribution, revealing that massive stars are much more abundant than previously thought.
A new study published in Nature shows that the mass of a galaxy's central black hole determines when its star formation history stops. The study found a continuous interplay between black hole activity and star formation throughout a galaxy's life, with bigger black holes quenching star formation faster.
Researchers used two radio telescopes and several optical telescopes to study the complex mechanisms fueling jets in Centaurus A, a nearby radio galaxy. They found evidence of a galactic wind and stars existing further out than previously thought.
Researchers found a strong inverse relation between magnetic field strength and star formation rate in molecular cloud complexes. This suggests that magnetic fields slow down or stop the collapse of gas clouds to form stars, leading to fewer massive stars in galaxy centers.
Astronomers used Hubble and Gaia data to directly measure the 3D motions of stars in the Sculptor Dwarf Galaxy, achieving accuracy better than previous measurements. The results provide insights into dark matter distribution and test the cosmological model.
Researchers combined Hubble and Gaia data to measure the proper motion of 15 stars in the Sculptor Galaxy, revealing an unexpected preference in direction. The findings question current models of dark matter halos, suggesting that assumptions on star populations may be invalid.
A team of astronomers from Georgia State University has discovered two old binary stars and identified 29 new old star candidates using a technique called astrometry. The study focused on subdwarf stars, which are cooler and older than the sun, and used their motion across the sky to determine their age.
Using ALMA's unparalleled sensitivity and resolution, the team identified eight massive dusty clouds along the center of the galaxy, each with a unique chemical signature. The clouds are thought to be aggregates of dense, warm cocoons around young stars, driving complex chemical reactions and molecule formation.
A team of researchers used the Subaru Telescope to study Messier 77, revealing evidence of a hidden minor merger billions of years ago. The discovery provides crucial evidence for the minor merger origin of active galactic nuclei and sheds light on the mysterious phenomenon.
Astronomers analyzed 10 galaxy clusters using Hubble data and found their brightest cluster galaxies wobble around the center of mass, inconsistent with current dark matter models. This result may indicate new physics is at work, requiring a reevaluation of fundamental physics to solve the mystery of dark matter.
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.
Astronomers using the VLBA have directly measured the distance to a star-forming region on the opposite side of the Milky Way, nearly doubling the previous record. This achievement allows for the accurate mapping of the Galaxy's structure and spiral arms.
A team of astronomers successfully traced a spiral arm on the far side of our Galaxy using radio interferometry and parallax measurements. They located the Scutum-Centaurus spiral arm as it passes around the far side and verified a new method to infer distances in this region.
Astronomers have discovered the most luminous nova ever seen in a nearby galaxy, using data from the Swift satellite observatory. The study provides insights into white dwarf eruptions, including the possibility of a supernova explosion in the future.
A newly discovered dwarf galaxy in the constellation Lynx has extremely low oxygen levels, likely resembling early nascent galaxies. The finding suggests that these tiny star-forming galaxies can offer valuable insights into how the first galaxies formed 13 billion years ago.
Researchers studied nuclear obscuration in AGN using infrared and X-ray studies, revealing complex gas and dusty clouds orbiting the black hole. The material is connected to the galaxy via outflows and inflows of gas, regulating star formation.
For the first time, astronomers have measured how a galaxy's spin affects its shape, finding that faster-spinning galaxies are flatter and spiral galaxies with faster spins have more circular disks. The study used a new instrument, SAMI, to analyze data from 845 galaxies.
Astronomers observe magnetic field of a galaxy 5 billion light-years away, finding a similar strength and configuration to the Milky Way's. This suggests galactic magnetic fields form early in a galaxy's life and remain relatively stable.
Scientists used a giant cosmic lens to study a star-forming galaxy nearly five billion light-years away, providing clues about the origin of galactic magnetic fields. The analysis revealed a large-scale, coherent magnetic field similar to those in nearby galaxies.
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 team of Russian and Chinese scientists has developed a model explaining the nature of high-energy cosmic rays in our Galaxy, focusing on Fermi bubbles. They propose that giant shock fronts can re-accelerate protons to energies exceeding 1015 eV, producing the observed CR spectrum above the 'knee'.
A team of astronomers used the MUSE instrument on the VLT to study how gas can be stripped from galaxies, focusing on extreme jellyfish galaxies. Six out of seven jellyfish galaxies were found to host a supermassive black hole feeding on surrounding gas.
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 study found that gas-rich galaxies in a cluster are located in the outer part of the cluster. This is the first time such a location differentiation has been observed in a galaxy cluster. The researchers believe that gas loss prevents star formation, leading to a decline in stellar birthrate over time.
A team of astronomers has discovered a superluminous supernova in a spiral galaxy, which is rich in elements heavier than hydrogen and helium. This discovery challenges current ideas about the origin of such powerful explosions.
A team of scientists has calculated the distribution of all light energy contained within the Milky Way, providing insight into galaxy formation and stellar processes. The research shows how stellar photons control gamma-ray production in the Universe.
Neal Katz, a theoretical astronomer at UMass Amherst, has received a Fulbright Scholarship to study and teach galaxy formation in collaboration with colleagues in South Africa. He will use computer simulations to advance understanding of galaxy formation and analyze data from the MeerKAT radio telescope.
A new control technique has been developed to achieve tight formation control of unmanned aerial vehicles (UAVs), reducing power requirements by minimizing vortices effects. The technique uses an adaptive control scheme to estimate and suppress the aerodynamic interference caused by closely flying UAVs, improving overall performance.
A team of scientists from Instituto de Astrofísica de Canarias discovered a very distant galaxy, some 10 thousand million light years away, about a thousand times brighter than the Milky Way. The galaxy is notable for having a high rate of star formation, forming stars at a rate of 1000 solar masses per year.
Located close to the Milky Way, IC 342 is a sweeping spiral galaxy with an active core. The Hubble Space Telescope image reveals a mixture of hot star-forming regions, cooler gas, and dark dust lanes around the bright core, indicating the presence of ionized hydrogen.
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 found that the fastest-moving stars in the Milky Way originated in the Large Magellanic Cloud, a dwarf galaxy in orbit around our own. Computer simulations and data analysis showed that these stars were ejected from their original home at incredible speeds.
Astronomers have spotted a rare opportunity to study the demise of a dwarf galaxy called Little Cub, which is being consumed by a gigantic neighbouring galaxy. The process provides clues about how smaller galaxies lose their gas and eventually shut down star formation.
The Hubble Space Telescope has imaged a powerful Seyfert galaxy, 2XMM J143450.5+033843, emitting huge amounts of radiation due to its supermassive black hole. The galaxy is nearly 400 million light-years away and is one of the unlucky ones with a unique X-ray name.
A team of scientists has detected the smallest ever recorded movement of an object across the sky, known as angular motion, in a giant galaxy with two supermassive black holes at its center. The movement is thought to be the result of one black hole orbiting around the other over a period of 30,000 years.
Researchers have detected orbital motion in a pair of supermassive black holes, marking the first-ever 'visual binary' of such systems. The two black holes are estimated to complete an orbit every 30,000 years and may merge millions of years later.
A team of scientists has detected a rotating stellar disk in the ancient elliptical-shaped galaxy MACS2129-1, located 10 billion light-years from Earth. This finding contradicts prevailing astrophysical theory regarding the formation of such galaxies shortly after the Big Bang. The stars in MACS2129-1 rotate at a speed of over 500 km p...
Astronomers find compact yet massive, fast-spinning, disk-shaped galaxy that stopped forming stars only a few billion years after the big bang. The discovery challenges current understanding of how massive galaxies form and evolve.
Researchers found turbulence caused by colliding galaxy clusters creates hot gas between them, about three times hotter than the sun's core. The team used NASA's Chandra X-ray Observatory and radio astronomy facility to study the phenomenon.