Articles tagged with Quasars
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.
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.
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.
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 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.
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.
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.
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.
Astronomers using NASA's Hubble Space Telescope have found galaxies containing quasars that act as gravitational lenses, distorting images of aligned galaxies. Quasars are powered by supermassive black holes and help estimate the mass of host galaxies.
Astronomers have discovered two gigantic black holes with masses about 10 billion times the mass of our sun, surpassing previous measurements by more than 50 per cent. The discovery suggests that these massive black holes may be the dormant remains of extremely luminous quasars from billions of years ago.
Astronomers have discovered the largest black holes to date, two monsters with masses equivalent to 10 billion suns threatening to consume anything within a region five times the size of our solar system. These black holes are located in giant elliptical galaxies more than 300 million light years from Earth.
Galaxies continuously recycle immense volumes of hydrogen gas and heavy elements, allowing successive generations of stars to form. The process is driven by gas-rich star-forming spiral galaxies that can evolve into elliptical galaxies without star formation.
Astronomers have found the largest and farthest reservoir of water ever detected in the universe, located in a distant quasar with a massive black hole. The discovery provides valuable information about the early universe's water vapor behavior and its influence on cosmic evolution.
Researchers detected massive water vapor in a distant quasar, equivalent to 34 billion times the mass of Earth. The discovery was made using a spectrograph called Z-Spec and reveals a time when the universe was only 1.6 billion years old.
Astronomers have discovered a massive reservoir of water vapor 30 billion light-years away in a quasar, which is 100,000 times more massive than the sun. The water vapor is distributed around a black hole and provides insights into its environment.
A new study by Brigham Young University researchers reveals that black holes' movement, including lateral motion and spin, fuels massive jets of energy known as quasars. The study confirms a long-held theory while introducing a new component: that black holes' lateral movement also powers these jets.
Scientists have discovered the most distant quasar to date, ULAS J1120+0641, with a redshift of 7.1, providing a unique opportunity to study the early universe. The object's massive black hole is estimated to be two billion times that of our Sun, challenging current theories on its growth.
The Baryon Oscillation Spectroscopic Survey (BOSS) has created the biggest 3-D map of the distant universe, using light from 14,000 quasars. The map demonstrates that it is possible to determine variations in the density of intergalactic hydrogen gas at cosmological distances and measure the effects of dark energy.
The e-MERLIN telescope has captured the first image of a galaxy with its gravitational lens, revealing multiple images of a quasar billions of light years away. This groundbreaking observation demonstrates the power of the new telescope system in studying the fine details of astronomical events.