Articles tagged with Radio Galaxies
Astronomers have found that a distant galaxy is nestled in a serene ocean of gas, defying expectations and providing new insights into the composition of galaxy halos. The discovery was made possible by a new technique involving fast radio bursts, which allowed researchers to study the gas directly.
Astronomers analyze radio pulses from a fast radio burst to characterize the diffuse gas in a galactic halo, finding surprisingly low density and weak magnetic field. The discovery challenges previous models and provides new insights into ejection processes and galaxy evolution.
Astronomers have discovered a pair of enormous radio-emitting bubbles in the center of the Milky Way, likely formed by a powerful eruption near the galaxy's supermassive black hole. The hourglass-like feature dwarfs all other radio structures in the galactic center.
Researchers have mapped out broad regions in the centre of the galaxy, tracing energetic regions in space with radio emission. The discovery suggests a violent eruption formed twin bubbles that are now visible for the first time, offering insights into the Galactic Centre and supermassive black hole.
Deshima, a Japanese-Dutch joint development, successfully obtained the first spectra and images of cosmic radio waves. The instrument achieves an ideal balance between frequency range and spectroscopic performance using innovative nanotechnology.
Researchers have localized a fast radio burst, FRB 190523, to a galaxy 7.9 billion light-years away, providing new clues in the ongoing cosmic mystery. The discovery suggests that every galaxy, including our Milky Way, can generate an FRB.
Researchers using the radio telescope ALMA have detected a galaxy in the early Universe 13 billion years ago, which is actually two galaxies merging together. The team observed signals of oxygen, carbon, and dust from the galaxy B14-65666, providing the earliest evidence of merging galaxies yet discovered.
Researchers have localized a non-repeating fast radio burst (FRB) to a medium-sized galaxy over 4 billion light years away. The findings show that the burst source and host galaxy are distinct from those of the only other localized FRB, offering insights into the properties of these enigmatic events.
In a world first, an Australian-led team of astronomers has determined the exact location of a powerful one-off burst of cosmic radio waves using CSIRO's ASKAP radio telescope in Western Australia. The galaxy from which the burst originated was imaged by three of the world's largest optical telescopes and published in the journal Science.
A team of researchers has discovered a massive radio-emitting plasma ridge in the gap between two merging galaxy clusters. This finding challenges existing theories on particle acceleration in intergalactic space and suggests an unknown mechanism at play.
Astronomers have made the first direct image of a dusty, doughnut-shaped feature surrounding a supermassive black hole in Cygnus A, a galaxy 760 million light-years from Earth. The feature, known as a torus, helps explain why objects with similar properties appear differently when viewed from different angles.
Researchers have detected a radio signal from abundant interstellar dust in MACS0416_Y1, a galaxy 13.2 billion light-years away. This discovery forces scientists to rethink the history of star formation and suggests that the galaxy experienced staggered starburst periods.
Researchers have developed an AI bot named ClaRAN to identify galaxies emitting powerful radio jets from supermassive black holes. The system uses machine learning to spot complex galaxy structures, reducing manual classification by human astronomers.
Researchers have found evidence for a large number of double supermassive black holes, precursors to massive galaxy mergers. The discovery was made by studying radio maps of powerful jet sources, which showed signs of periodic changes in jet direction, indicative of binary black hole mergers.
Astronomers used the VLBA to study the effects on radio waves coming from a distant galaxy when an asteroid passed in front of it. They measured the size and shape of the asteroid, improving the accuracy of its orbital path calculation.
Astronomers have found a quasar with the brightest radio emission ever observed in the early universe, providing unprecedented insight into the universe's youth. The discovery allows researchers to study the early galaxy formation process, which is crucial for understanding the evolution of the cosmos.
A team of scientists tracked a stellar death caused by a supermassive black hole ripping apart a star in the Arp 299 galaxy. The researchers directly imaged the formation and expansion of a fast-moving jet of material ejected when the black hole destroyed the star.
Astronomers have discovered that all galaxies rotate at the same rate, with a sharp edge containing older stars, gas, and young stars. This regularity helps understand galaxy mechanics, enabling more efficient observations and reduced processing power.
Researchers found that the 'twisting' phenomenon caused by Faraday rotation in magnetized plasma helps them narrow down the source of the cosmic blast. The data suggests a high magnetic field and dense gas surrounding the source, potentially linked to a young neutron star or massive black hole.
A team of researchers has discovered a Z-shaped structure in a microquasar, which challenges current theories on gravitational wave emission from distant radio galaxies. The study suggests that these structures may form through hydrodynamic interactions rather than black hole fusion.
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.
New observations reveal previously undetected regions where shocks accelerated subatomic particles, causing radio emission. Astronomers believe a North-South and East-West collision occurred, with possible third collision still to be analyzed.
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 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.
Researchers found that atomic hydrogen makes up a majority of gas in younger galaxies, contradicting expectations. This discovery has significant implications for our understanding of the early Universe and the role of cold gas in star formation.
Astronomers have detected the closest ever binary supermassive black hole system in galaxy NGC 7674, featuring two massive black holes with a combined mass of 40 million solar masses. The discovery is significant as it confirms theoretical predictions and provides insight into gravitational wave sources.
A study published in 'Nature Astronomy' confirms that supermassive black holes can form gravitationally bound pairs when galaxies merge. The binary system has a mass of approximately 40 million times the Sun's, and its orbital period is about 100,000 years.
Astronomers have measured large, well-ordered magnetic fields in a galaxy 4.6 billion light-years away, providing clues about how magnetic fields formed and evolved over cosmic time. The new observations offer insights into the structure of galactic-sized magnetic fields since the beginning of the universe.
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.
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 have discovered a unique lensing system that provides the best view yet of blobs of hot gas streaming from supermassive black holes. The discovery allows scientists to see these clumps closer to the central engine of the black hole and in greater detail than before.
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.
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 team of researchers has made the best measurement yet of molecular gas, a raw material for star formation, in three massive galaxy clusters in the early universe. The study found that cluster galaxies have more fuel available to form stars than previously thought.
Researchers discovered new details about the Perseus Cluster's mini-halo, a pool of superfast particles emitting radio waves. The study revealed complex mechanisms causing the radio emission, including particle reacceleration and a powerful black hole's energy kick.
Astronomers using the VLA discovered a bright new object near Cygnus A's core, suggesting it could be either a rare supernova explosion or an outburst from a second supermassive black hole. The object's characteristics indicate it may have formed when the galaxy merged with another.
Researchers have observed and interpreted a cosmic phenomenon resulting from the acceleration of gas clouds by black holes and reacceleration by shock waves. The study reveals the connection between double acceleration and radio emission in galaxy clusters.
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.
New research suggests that fast radio bursts might be evidence of advanced alien technology, powering interstellar probes in distant galaxies. A study found that a planet-sized transmitter could generate the needed energy to make such detection possible.
A team from the Instituto de Astrofísica de Canarias has found a new method to measure star formation rates in galaxies using radio emission. The study reveals that radio waves are an ideal tracer for estimating star formation rates, unaffected by interstellar dust and not requiring combination with other tracers.
Scientists suggest a global network of cell phones or small radio receivers could 'hear' nearby Fast Radio Bursts (FRBs). A free smartphone app could monitor appropriate frequencies, sending data to a central facility.
A global team of researchers found that ram-pressure stripping is more prevalent than thought, driving gas from galaxies and preventing star formation. The study reveals that this process is potentially the dominant way galaxies are quenched by their surrounds, leading to an early death.
Cornell University researchers have identified a distant cosmic source of 'fast radio bursts' emitting massive energy pulses from across the universe, exceeding 3 billion light-years away.
Researchers have pinpointed the location in the sky of a Fast Radio Burst (FRB), allowing them to determine the distance and home galaxy of one of these mysterious pulses of radio waves. The precise location enables observations using multiple telescopes, which revealed a faint dwarf galaxy at the location of the bursts.
A team of researchers has localized the source of a Fast Radio Burst (FRB) to an older dwarf galaxy over 3 billion light years away. The galaxy is believed to harbor a supermassive black hole and may be connected to other energetic events such as supernovae and gamma-ray bursts.
Astronomers used VLA and ALMA to study distant galaxies, revealing details of dust-shrouded regions. They found intense star formation occurred throughout galaxies, contrary to present-day high rates in smaller regions.
An international team of scientists has discovered that the biggest galaxies in the universe develop in cosmic clouds of cold gas. The study used radio telescopes to investigate an embryonic galaxy cluster, where they found a cloud of very cold gas where galaxies were merging.
Astronomers detected carbon monoxide gas indicating large quantity of molecular hydrogen, suggesting formation of a single, gigantic galaxy. The cloud of cold gas is estimated to be three times the size of the Milky Way Galaxy.
Researchers used brightness and simultaneous detection to pinpoint FRB source, measuring galaxy's magnetic field for better cosmology models. The findings shed light on the origins of powerful radio flashes, offering insights into stellar evolution and the Universe's larger-scale structure.
Scientists have detected the brightest FRB to date, providing a new understanding of the diffuse intergalactic material and its turbulence. By studying this phenomenon, researchers can gain insights into the production of cosmic magnetic fields.
Astronomers have discovered a 'nearly naked' supermassive black hole after a smaller galaxy passed through a larger neighbor, stripping away nearly all its stars and gas. The remnant black hole is now speeding away at over 2,000 miles per second.
Researchers found a clandestine black hole, VLA J2130+12, within the Milky Way galaxy, which is about five times closer to Earth than previously thought. This black hole is pulling in material from a companion star at a very slow rate, making it nearly undetectable.
A team of astronomers using ALMA observed a supermassive black hole at the center of galaxy Abell 2597 feeding on chaotic downpour of cold, clumpy clouds. The discovery provides evidence for 'cold, chaotic accretion', a process that challenges traditional models of how black holes grow.
Two volunteer participants in Radio Galaxy Zoo discovered a rare C-shaped galaxy cluster that they pieced together from much smaller images of cosmic radio waves. The team's dataset, with over 1.6 million images classified by 10,000 volunteers, has already reached almost 60% completeness.
An international team of scientists has detected a faint signal emitted by hydrogen gas in a galaxy over five billion light years away. The detection, achieved using the Very Large Array radio telescope, reveals an unusually large amount of hydrogen and provides insights into the history of galaxy evolution.
A team of astronomers used ALMA to measure the speed of carbon monoxide gas orbiting a supermassive black hole, calculating its mass as 660 million times greater than our Sun. This precise measurement is crucial for understanding these cosmic behemoths and their role in galaxy evolution.
The Five hundred metre Aperture Spherical Telescope (FAST) in China features technology developed by CSIRO engineers, making it one of the most sensitive telescopes globally. The telescope will explore the nature and evolution of the universe, helping to detect thousands of new pulsars.
Astronomers discover that the 'afterglow' of a fast radio burst was actually a persistent radio source from a supermassive black hole. The discovery resolves the mystery of the black hole's behavior, which varies randomly due to scintillation and changes in matter consumption.
Astronomers have detected repeating fast radio bursts (FRBs) from an enigmatic source, suggesting an extremely powerful object that occasionally produces multiple bursts. The findings indicate the source is likely located beyond the Milky Way galaxy.
Astronomers have found a massive tail of hydrogen gas extending from a nearby galaxy, measuring five times longer than the galaxy itself. The discovery suggests that this phenomenon is common in galaxy clusters, and could be indicative of many other galaxies having similar features.