Articles tagged with Quasars
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.
Astronomers at the University of Iowa suggest quasars could be responsible for the extinction of dusty starburst galaxies. The study found four galaxies with visible quasars, which could indicate that every dusty starburst galaxy hosts a quasar.
Researchers used data from the intergalactic medium to narrow down what dark matter could be, casting doubt on 'fuzzy dark matter' and lending credence to 'cold dark matter.' The findings could inform ongoing efforts to detect dark matter directly.
A team of astronomers discovered a new kind of galaxy that formed less than a billion years after the Big Bang, creating stars more than 100 times faster than our Milky Way. This find solves a long-standing puzzle of how massive galaxies came to have hundreds of billions of stars when they formed so quickly.
A team of astronomers has made the first measurements of small-scale ripples in primeval hydrogen gas, using rare double quasars. The results provide important clues about the temperature of gas in the cosmic web just a few billion years after the Big Bang.
Researchers used ALMA to detect emissions from two distant galaxies, revealing massive, dusty systems with high star formation rates and extended layers of gas. The galaxies are embedded in a large halo or disk of neutral hydrogen gas, indicating rapid growth and evolution.
Researchers directly observed two Milky Way-like galaxies when the universe was eight percent of its current age, surrounded by massive hydrogen gas halos. The galaxies are forming stars at moderate rates and already rotating, similar to today's giant spiral galaxies.
Astronomers discovered a supermassive black hole weighing over 1 billion suns that was propelled out of the center of a distant galaxy due to gravitational wave energy. The estimated equivalent energy is 100 million supernovas, and the black hole travels at speeds of up to 4.7 million miles per hour.
The discovery of over 60 extremely distant quasars nearly doubles the known number, offering a unique window into the early universe. Studying these 'lighthouses' of the cosmos will help understand how galaxies developed and interacted with supermassive black holes.
Astronomers have found a massive, luminous nebula at the heart of a 'rotocluster' of early galaxies, which appears to be part of the cosmic web connecting galaxies. The newly discovered nebula, MAMMOTH-1, is thought to be powered by a hidden active galactic nucleus (AGN) that is strongly obscured by dust.
The Hubble Constant measurement by the H0LiCOW collaboration hints at 'new physics' beyond the standard model of cosmology. The team used gravitational lenses to measure the universe's expansion rate, which is crucial for confirming or refuting the current picture of dark energy and dark matter.
Astronomers using the Hubble Space Telescope have made an independent measurement of the universe's expansion rate, consistent with earlier findings but in disagreement with measurements from the early Universe. The study uses galaxies as giant gravitational lenses to determine the Hubble constant to a high precision.
The H0LiCOW collaboration has made a new measurement of the Hubble constant using quasars and gravitational lensing. The result agrees with recent independent studies but disagrees significantly with cosmic microwave background measurements, potentially indicating new physics beyond the standard cosmological model.
AUC Riverside-led team discovers unique population of extremely red quasars with high incidence of powerful quasar-driven outflows. These outflows may be involved in galaxy-wide blowouts of gas and dust, halting further growth in black holes and inhibiting star formation.
Researchers found a supermassive black hole with an estimated mass of 17 billion solar masses in the galaxy NGC 1600, located 200 million light-years from Earth. This discovery suggests that these massive objects may be more common than previously thought and could be living in smaller galaxies.
The scientists combined the Russian RadioAstron satellite with ground-based telescopes to produce a virtual radio telescope over 100,000 miles across. They discovered temperatures hotter than 10 trillion degrees in a quasar, challenging current understanding of quasar jets.
Astronomers have discovered the fastest ultraviolet winds ever seen near a supermassive black hole, with wind speeds of over 200 million miles per hour. This breakthrough study sheds light on quasar outflows and their role in galaxy formation.
Researchers at York University have detected the fastest winds ever seen near a supermassive black hole, with speeds reaching 200 million km/h. This discovery sheds light on quasar winds' role in galaxy formation and their impact on star creation.
Researchers accurately measured the rotational rate of an 18 billion solar mass supermassive black hole, one-third of the maximum spin rate allowed in General Relativity. The binary black hole model reveals a smaller companion orbiting around it, affecting accretion disk behavior.
A team of Spanish researchers has accurately detected a structure in the innermost region of a quasar at a distance of over 5 billion light-years using the gravitational microlensing effect. This breakthrough will help us better understand how galaxies were born and evolve.
Astronomers discover invisible structures shaped like noodles or hazelnuts, which could radically change ideas about interstellar gas. The shapes were estimated using innovative new technique and observations of a quasar lensing event.
Astronomers have discovered a highly turbulent galaxy that may soon lose its supply of star-forming gas due to violent motion. The galaxy, W2246-0526, is an obscured quasar with a supermassive black hole at its center, causing intense radiation that exerts pressure on the entire galaxy.
Researchers used ALMA to study W2246-0526, the most luminous galaxy known, finding it's ejecting its star-forming gas due to intense infrared radiation. This turbulence could lead to the galaxy evolving into a traditional quasar.
Astronomers discovered a distant quasar that has apparently run out of gas, leading to a significant decrease in its brightness. The quasar, SDSS J1011+5442, was found to have consumed all the glowing-hot gas in its vicinity, causing it to dim drastically.
Researchers predict a physical effect that would help physicists and astronomers test Einstein's general theory of relativity. The gravitational Faraday effect, first predicted in the 1950s, theorizes that light polarization rotates according to Einstein's theory when traveling close to a spinning black hole.
Astronomers at Columbia University provide evidence of a pair of supermassive black holes converging towards a collision. They predict the smashup will occur in 100,000 years, offering insights into black hole growth and space-time vibrations.
Astronomers use Hubble Space Telescope to uncover the early formative years of quasars, finding that galaxy collisions and mergers drive their peak activity. The observations reveal the transitional phase in the merger-driven black hole scenario, providing new insights into the universe's brightest objects.
Researchers found a pulsing quasar in the Pan-STARRS1 Medium Deep Survey, which could be evidence of a binary supermassive black hole system. The discovery sheds light on the end stages of galaxy mergers and may aid in pinpointing thousands of merging supermassive black holes.
The Hubble Space Telescope has captured wispy, goblin-green objects outside quasar-host galaxies, revealing insights into galaxy behavior and energetic cores. These 'ghostly' structures are believed to have been illuminated by powerful ultraviolet radiation from supermassive black holes.
Astronomers have found a super-bright quasar powered by the most massive black hole ever observed for an object from that time, located at a distance of 12.8 billion light years away. The quasar is 7 times brighter than the most distant known quasar and has a luminosity of 420 trillion solar units.
Researchers have discovered the brightest quasar in the early universe, powered by a massive 12 billion solar mass black hole. The quasar's luminosity is equivalent to 420 trillion suns and is seven times brighter than the most distant known quasar.
An international team of astronomers has found a huge and ancient black hole powering the brightest object in the early universe. The massive black hole is 12 billion times the size of our Sun and lives at the center of a quasar, emitting millions of billions of times more energy than the Sun.
Researchers detected a nearly spherical stream of highly ionized gas streaming out of the quasar PDS 456, measuring the strength of ultra-fast black hole winds. The discovery reveals that these powerful winds can transfer energy back to their host galaxies and affect star formation.
New research from Carnegie Institution solves a 20-year puzzle in quasar research by demonstrating that the Eddington ratio is the driving force behind the main sequence of quasars. The study also reveals the importance of an astronomer's line-of-sight orientation in observing fast-moving gas innermost to the black hole.
Researchers from UCL and collaborators aim to determine whether numerous small galaxies or rare quasars produce more ultraviolet light. A forthcoming survey will analyze detailed measurements of a million distant quasars to map the neutral hydrogen gas in the universe, revealing its history.
Researchers propose a solution for the rapid growth of ancient quasars, where small black holes zigzagged through dense gas streams, pulling in material and feeding on it rapidly. This mechanism allowed the black holes to grow at an exponential rate, eventually leading to massive growth rates.
A recent study finds a 400% discrepancy between expected and observed ultraviolet light in the cosmic budget, with implications for our understanding of dark matter. Scientists are working to shed light on the mystery, which may be explained by exotic new sources or decaying dark matter.
The Cosmic Web Imager has obtained three-dimensional pictures of the intergalactic medium, revealing the structure of the IGM for the first time. The instrument has detected a possible spiral-galaxy-in-the-making, three times the size of the Milky Way.
The BOSS study uses quasars to map density variations in intergalactic gas, tracing the structure of the young universe and illuminating the nature of dark energy. The latest results establish the expansion rate at 68 km/s/Mly at redshift 2.34 with unprecedented accuracy of 2.2 percent.
Researchers at MIT have proposed an experiment using distant quasars to determine the settings of particle detectors, which could close the 'free will' loophole and provide evidence for quantum mechanics. This setup would utilize the oldest light in the universe to eliminate potential biases.
Researchers detected a distant quasar illuminating a vast nebula of diffuse gas, extending about 2 million light-years across intergalactic space. The study provides the first image of extended gas between galaxies, offering insight into the overall structure of the universe.
Researchers used data from the Sloan Digital Sky Survey to discover measurable shifts in giant gas clouds around galaxies in a span of just five years. The findings suggest that these clouds are much smaller than previously thought, with implications for how galaxies form and evolve over time.
Astronomers have observed a distant quasar split into multiple images by the effects of a Milky Way gas cloud. The event provides a rare opportunity to study the properties of turbulent gas in our galaxy.
A team of astrophysicists discovered the extent to which quasars and black holes shape their galaxies. They found that quasar radiation can illuminate gas up to a galaxy's boundaries, influencing star formation and galaxy growth. The study uses observations from the Southern African Large Telescope and NASA's WISE space telescope.
Astronomers have observed a galaxy feeding on material from its surroundings, shedding light on galaxy formation. The study used ESO's VLT to analyze the properties of gas around the galaxy, providing unique insights into the growth of galaxies.
A team of researchers studied an early galaxy using the ESO Very Large Telescope and Hubble Space Telescope, determining its size, mass, element content, and star formation rate. The study found that the galaxy contained a high proportion of heavier elements, similar to those in the centre and outer parts of the galaxy.
The University of Colorado Boulder has joined the Sloan Digital Sky Survey-IV to study the structure and evolution of the universe. The survey will use powerful new instruments to analyze data from galaxies and quasars, shedding light on dark energy and the formation of our galaxy.
Astronomers at CU-Boulder used the Hubble Space Telescope to study a quasar's impact on early universe conditions. The team found that 'sideline quasars' likely teamed up with the bright quasar to heat helium gas, preventing small galaxy formation.
A team of scientists has found an extremely rare triple quasar system, which is believed to be the result of galaxies colliding. The system consists of three distinct sources of energy, with two members closer together than the third.
A team of researchers at MIT analyzed light from a quasar, which is the most distant object known, to study the era of the first stars and galaxies. They found no evidence of heavy elements in the surrounding gaseous cloud, suggesting that the quasar dates back to an era nearing the universe's first stars.
A record-setting X-ray jet has been detected 12.4 billion light years from Earth, providing a glimpse into the explosive activity associated with supermassive black holes in the early universe. The jet is thought to be boosted by cosmic background radiation and points almost directly toward us.
Researchers at Virginia Tech have discovered a quasar with the most energetic outflow ever recorded, exceeding the Milky Way galaxy's total power output by 100 times. The massive material ejected has a rate equivalent to two trillion times the sun's power output.
The BOSS survey maps quasars to study dark energy, revealing a new era of the universe's expansion history. By analyzing the Lyman-alpha forest, scientists can measure BAO and calibrate the rate of expansion.
Astronomers discovered a quasar hidden behind a dusty galaxy, where no starlight is visible due to intense dust blocking. The James Webb Space Telescope will help detect the underlying stars, which were not seen by Hubble.
Researchers at Case Western Reserve University have found a way to map the spread and structure of the universe using the light of quasars. By analyzing patterns of light variation over time, they were able to calculate the relative size of the universe when the light was emitted, compared to today.
The Baryon Oscillation Spectroscopic Survey (BOSS) has released its first public data, providing spectra for 535,995 galaxies, 102,100 quasars, and 116,474 stars. This dataset will help track the universe's expansion history, probing gravity and dark energy.
Astronomers have spotted the first direct detection of dark galaxies in the early Universe, shedding light on these elusive objects. The team used a bright quasar to illuminate gas-rich galaxies, revealing their existence and properties, including suppressed star formation efficiency.
Scientists add an extra second to the UTC time standard to account for Earth's rotating day lengthening due to tidal forces. The 35th leap second is added to keep UTC within 0.9 seconds of UT1, which relies on precise VLBI measurements.
New study finds that most massive black-hole growth in the early universe was fueled by small, long-term events rather than dramatic short-term major mergers. Quasars thrive in normal-looking spiral galaxies, triggered by black holes snacking on gas or small satellite galaxies.
Researchers found that some baby galaxies from over 12 billion years ago had a high content of heavier elements, similar to our Sun. This suggests potential for planet formation and life in the early Universe. The study used quasars as light sources to analyze the spectral lines and measure the amount of elements.