In a groundbreaking study, UCI scientists discovered how galaxies can strip smaller ones of their dark matter during collisions. This mechanism has the potential to explain how galaxies might be able to exist without dark matter, challenging long-held theories.
A new study published in Astronomy and Astrophysics suggests that dark matter particles interact with ordinary matter, leading to a constant density region that expands over time. The research challenges the current prevailing theory of Lambda-Cold Dark Matter, which posits that particles are inert and only interact through gravity.
A team of astronomers has discovered a massive cluster of young galaxies forming in the early universe, with many member galaxies already stopped forming stars. The newly found growing galactic metropolis is about 11.8 billion light-years away and consists of at least 38 member galaxies.
A team of astronomers discovered an unusual massive cluster of young galaxies forming in the early universe. The newly found growing galactic metropolis, MAGAZ3NE J0959, consists of at least 38 member galaxies and is about 11.8 billion light-years away from Earth.
Researchers found that the number of flat disk galaxies in our universe exceeds predictions from the Standard Model of Cosmology. The discrepancy suggests that dark matter may not be as prevalent as thought, forcing scientists to reevaluate their understanding of galaxy formation and evolution.
Researchers tracked 10,000 galaxies and clusters over 11.5 billion years, revealing complex motions influenced by gravity and the Big Bang theory. The study provides new insights into the formation history of large-scale mass structures in the universe.
Astronomers have found an intermediate-mass black hole in the Andromeda galaxy, one of only a few confirmed objects of its kind. The discovery sheds light on the formation of galaxies and provides insights into the population of black holes at the centers of low-mass galaxies.
Researchers found a powerful black hole in a nearby galaxy that may have played a key role in the universe's reionization process. The discovery sheds light on how the first stars and galaxies formed, with implications for our understanding of the universe's evolution.
A team of astronomers has developed a new technique to detect active black holes in galaxies, measuring their impact on galaxy evolution. The method can be applied to millions of galaxies, searching for bright supermassive black holes at the centre of galaxies and studying their effect on star formation.
Researchers have found no dark matter in the ultra-diffuse dwarf galaxy AGC 114905, which can be explained by normal matter. The discovery confirms previous measurements and raises questions about the existence of dark matter in galaxies.
Using Arecibo's observations of nearby galaxies, researchers have found that the relationship between a galaxy's mass and rotation speed is not as straightforward as previously thought. The study provides a constraint for future researchers to develop theories on how galaxies evolve.
Astronomers have discovered two previously invisible galaxies 29 billion light-years away that were camouflaged by cosmic dust. The discovery suggests that up to one in five such distant galaxies may still be hiding behind the cosmic veil.
Researchers have detected water and carbon monoxide molecules in the largest galaxy in the early Universe, located nearly 13 billion light-years from Earth. This finding provides insight into the formation of life-creating elements in the earliest galaxies.
A team of astronomers used Hubble and Gran Telescopio Canarias data to study faint galaxies, revealing a 'fitful' start to the Universe. The first stars likely formed in bursts, followed by long periods of inactivity.
Researchers used Hubble and ALMA telescopes to detect distant galaxies with little to no cold gas, revealing why some massive galaxies stopped forming new stars. The team's findings rewrite the early history of the universe, shedding light on galaxy evolution.
Researchers have discovered six early massive galaxies that have run out of fuel, contradicting expectations of the early Universe. The galaxies' cessation of star formation was not caused by inefficiency, but rather depletion or removal of gas reservoirs.
A team of astronomers has observed six massive galaxies in the early universe that have mysteriously stopped forming stars due to depleted gas reserves. The discovery was made possible by the Hubble Space Telescope's high resolution and gravitational lensing, allowing researchers to study these galaxies in unprecedented detail.
The Hubble Space Telescope and ALMA have discovered six early, massive galaxies that have run out of hydrogen gas to form stars. These 'dead' galaxies, which appeared in the universe just 20% of its current age, were found using strong gravitational lensing, a technique that amplifies light from distant objects.
Researchers used ALMA to observe distant galaxies and discovered two new, dusty galaxies near original targets, challenging our understanding of early galaxy formation. The discovery suggests that a significant portion of early galaxies may be hidden from view due to cosmic dust.
Researchers from Australian National University confirm that star-forming galaxies are responsible for creating gamma-rays that had been puzzling astronomers. The discovery sheds light on the origins of these mysterious emissions and could provide clues to understanding Dark Matter.
An international team used the MUSE instrument to map a galactic wind and observe the formation of a nebula around a galaxy, revealing some of the Universe's missing baryons. This discovery confirms that 80–90% of normal matter is located outside of galaxies.
Researchers used detailed simulations to detect and study 'quenched' UDGs, which are rare dwarf galaxies that have stopped generating stars. They found these galaxies were not in clusters but rather isolated in voids, with unique orbits that stripped away their star-forming gas.
Researchers used simulations to detect extended dwarf galaxies with low surface brightness, challenging previous theories. The study found that these 'quenched' UDGs originated in backsplash orbits and are isolated from their parent systems.
Researchers have confirmed that galaxies emit a significant amount of polluted gas into space, contrary to previous assumptions. This 'outflow' is driven by the process of star formation and can include elements such as oxygen, carbon, and iron.
A supercomputer simulation reveals that interstellar frontal collisions lead to the maturation of young galaxies. The study shows how these chaotic galaxies eventually form stable spiral galaxies with similar populations of stars as the Milky Way.
A study by NYU Abu Dhabi researchers reveals the connection between central supermassive blackholes and the evolution of their host galaxies. The findings outline gas ejection mechanisms and how they relate to the activity of these blackholes, shedding new light on galaxy evolution.
Researchers have discovered a remnant radio galaxy in Abell2065, providing insights into the dying phase of active galaxies. The discovery showcases the capability of upgraded GMRT to detect such objects, shedding light on their dynamics and evolution.
Researchers using ALMA data have observed gas re-accreting onto galaxies affected by ram pressure stripping, potentially slowing down their demise. This process creates unique structures resistant to ram pressure's effects, with mass and a sticky nature that holds onto material more tightly.
Researchers from IAC and STScI discovered transverse rotation in three dwarf spheroidal galaxies using Gaia satellite data, shedding light on their evolutionary history. This finding supports the idea that these galaxies may have formed through the agglomeration of smaller systems.
A team of astronomers has made detailed observations of a large tidal flow around the Sombrero galaxy, revealing its strange morphology and shedding light on its possible merger history. The study's findings suggest that the galaxy's unusual shape may be due to cannibalism by a satellite dwarf galaxy.
Astronomers find that massive black holes play a key role in halting star formation in galaxies, contradicting previous assumptions. Using simulations and machine learning, the team confirmed that supermassive black hole mass is the most important factor in suppressing stellar activity.
Using numerical simulations, researchers showed that satellite galaxies can retain gas and experience new episodes of star formation after passing close to their parent galaxy. This process is driven by the satellite's reserve of cold gas and minimum distance from its parent galaxy.
A new study suggests that cosmic dawn, when stars formed for the first time, occurred between 250 and 350 million years after the beginning of the universe. The study used data from the Hubble and Spitzer Space Telescopes to estimate the age of distant galaxies.
Researchers used ALMA to detect a galactic wind driven by a supermassive black hole 13.1 billion years ago, pushing back the start of galaxy-growth interactions by 100 million years. The observation reveals coevolution between supermassive black holes and galaxies since less than a billion years after the Universe's birth.
Satellite galaxies that orbit massive central galaxies can form new stars due to active black holes clearing their path through intergalactic gas. Researchers used systematic observations and cosmological simulations to find this counter-intuitive effect.
A study reveals that black holes have an unexpected effect on galaxy evolution, influencing the formation of stars in satellite galaxies at vast distances. The research found a clear modulation of star formation rates depending on a galaxy's orientation with respect to its central black hole.
A team of researchers has conducted the first systematic survey of stellar nurseries, charting over 100,000 nurseries in 90 nearby galaxies. The study reveals that these nurseries are surprisingly diverse across galaxies, live only a relatively short time, and are not very efficient at making stars.
A team of astronomers mapped molecular clouds in the nearby Universe, discovering diversity in stellar nurseries across 90 galaxies. The study found that location and environment play a critical role in star formation, with clouds in dense central regions being more massive and turbulent.
Researchers from NCRA-TIFR and RRI used the Giant Metrewave Radio Telescope to measure the atomic hydrogen gas content of galaxies 9 billion years ago. They found that galaxies at this time were rich in gas, with nearly three times as much mass in atomic gas as in stars.
Researchers discover two waves of bulge formation in disc galaxies, with older bulges formed at redshift 6.2 and younger ones at 1.3. The bulges formed quickly or over thousands of million years, showing the universe has two ways to form galaxy centers.
A team of scientists discovered that three dozen dwarf galaxies simultaneously accelerated their star birth rates, defying expectations. The galaxies, separated by up to 13 million light-years, had a synchronized decrease in stellar birth rate 6 billion years ago and an increase 3 billion years ago.
Researchers have created a new map of dark matter in the local universe using machine learning, revealing previously undiscovered filamentary structures connecting galaxies. The map provides a detailed understanding of the distribution of dark matter and its gravitational influence on galaxies.
Astronomers use Hubble to pin five FRBs to host galaxies and identify their origins as young magnetar outbursts. The study provides new insights into the nature of these powerful events, which generate energy equivalent to the Sun's in a year.
Researchers discovered a galaxy with a spiral structure 1.4 billion years after the Big Bang using ALMA data. The galaxy's estimated mass is roughly equal to that of the Milky Way and contains a large amount of dust, making it difficult to study in visible light.
Researchers observed the first-ever galaxy in a 'blow-away' state, which suggests that small galaxies were responsible for reionization. The study reveals that intense star-formation can cause galaxies to lose their hydrogen clouds, allowing high energy light to escape.
Astronomers used ALMA to discover a rotating baby galaxy, providing insights into the early Universe. The galaxy, RXCJ0600-z6, is about 1/100th the size of the Milky Way and has a mass of 2-3 billion times that of our Sun.
The discovery of four double quasars offers insights into galaxy formation and the evolution of supermassive black holes. Quasars are brilliant beacons that can outshine entire galaxies, and their proximity in merging galaxies provides a unique window into the early universe.
Two close quasar pairs are found in distant merging galaxies, separated by just over 10,000 light-years. This discovery provides crucial insight into the existence of supermassive black hole pairs and galaxy mergers in the early Universe.
Researchers have discovered that missing baryonic matter is found in the space between galaxies as hot, low-density gas. This study also provides new insights into the nature of gravity, showing that observations are compatible with Einstein's theory of General Relativity.
Researchers used cosmic microwave background data to map location and density of missing baryons around galaxy groups. The measurements reveal that these halos extend up to 6 million light-years from their center, challenging previous models.
A team of astronomers used a natural cosmic lens to magnify the light from a distant radio galaxy, detected for the first time using the VLA. The discovery provides valuable insights into star formation in low-mass galaxies at early universe ages.
Researchers have made groundbreaking discoveries about the formation of galaxies and stars using data from the Atacama Cosmology Telescope. By analyzing microwave observations, they found that only a small percentage of gas in galaxies (about 10%) is turned into stars, shedding light on why galaxy formation remains inefficient.
A new study led by IAC researchers using the OSIRIS instrument on GRANTECAN has discovered the most densely populated galaxy cluster in formation in the primitive universe. The cluster, located 12.5 billion light years from us, is made up of galaxies with normal star formation rates and is predicted to evolve into a Virgo-like cluster.
Astronomers have detected streams of cold gas flowing through the dark matter halo of an early massive galaxy, supplying materials for star formation. The discovery provides direct evidence for cosmic filaments ferrying cold gas to galaxies during the early universe.
Research reveals large galaxies steal molecular gas from smaller satellite galaxies, impacting star formation rates. The study provides new systematic evidence of gas loss through ram pressure stripping, leading to galaxy stagnation without gas acquisition.
A team of researchers used stellar kinematics to study dark matter in ultra-faint dwarf galaxies, revealing a dense core and limited scattering. This challenges existing theories on self-interacting dark matter, suggesting that supernova explosions may be responsible for less dense distributions.
Researchers found that some dwarf galaxies may appear dark-matter free due to extreme tidal mass loss, challenging the LCDM cosmological model. Simulations suggest a combined solution to both the structure and low dark matter content of these ultradiffuse galaxies.
The SAMI survey has revealed the internal structures of galaxies, showing how they interact and grow over time. The study provides insights into the forces that shape galaxy evolution, including the role of supermassive black holes.
Research reveals that galaxies with larger, 'puffy' disks continue to form stars over a longer period after cosmic noon. This is due to the cooler gas and lower influence of black holes, allowing for continued star formation. By studying galaxy disk size, astronomers can now accurately predict when star formation will cease.
Astrophysicists at MIT have discovered an extended dark matter halo around Tucana II, a primitive ultrafaint dwarf galaxy. The halo is estimated to be three to five times more massive than previously thought, implying that the first galaxies in the universe were likely larger and more massive.