Articles tagged with Radio Galaxies
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Researchers detected radio absorption by gas clouds in front of bright radio sources, revealing the composition and conditions of diffuse gas in the Milky Way galaxy. The discovery of three new absorption systems and confirmation of one previously known system provides insight into tenuous gas clouds and their role in the universe.
Astronomers have identified a type of gas found in galaxy voids that appears to fuel star formation under certain conditions. Researchers used radio telescopes to measure atomic gas levels in galaxies with gamma-ray bursts, finding large amounts of the gas near these events.
Researchers have discovered a dying giant radio galaxy 9 billion light years away, offering insights into the properties of magnetic fields in the distant universe. The galaxy's radio lobes are fading due to energy loss through radio wave emission and inverse Compton scattering.
Astronomers reanalyzed archival data to find only 11 galaxies with 'genuine' mergers, leading to a lower estimated rate of galaxy mergers and potentially fewer supermassive black hole pairs. This reduces the level of expected gravitational waves from X-shaped radio galaxies.
A recent study published in Monthly Notices of the Royal Astronomical Society found that trained volunteers can identify jets shooting from massive black holes and match them to their host galaxies with high accuracy. The project, Radio Galaxy Zoo, uses online tutorials to teach volunteers how to spot black holes and other objects emit...
Astronomers detect faint radio signals of ionized carbon in distant galaxies, suggesting these ancient systems were less chemically evolved than expected. The findings reveal that even normal-sized galaxies in the early Universe can exist, but with lower dust concentrations and higher velocities.
The study reveals a helically-twisted loop of magnetic field coiled around the galaxy's main spiral arm, affecting gas flow and star production. The discovery helps explain how galactic spiral arms are formed, resolving major questions about galaxy evolution.
Astronomers using ALMA measured the mass of a supermassive black hole at the center of NGC 1097, a barred spiral galaxy 45 million light-years away. The black hole was found to be 140 million times more massive than our Sun.
The detection of a supermassive black hole at the center of Messier 32, a satellite of the Andromeda Galaxy, reveals a 'quiescent' black hole with activity among the weakest yet found. The VLA's improved sensitivity allowed for the detection of radio emission from the black hole, which is roughly 90 times fainter than previous studies.
Researchers have imaged tube-like structures in the Earth's magnetosphere, which are 500 to 700 kilometers above the surface. The structures were detected by mapping variations in radio source positions and exploiting the MWA's rapid snapshot capabilities.
A team of astronomers discovered a spiral galaxy devouring a nearby compact dwarf galaxy and found remnants of previous galactic snacks. The study used ground and space-based telescopes to measure chemical enrichment in the gas across the entire face of NGC 1512.
Researchers have produced a detailed image of a galaxy-cluster collision using the VLA radio telescope, showing a variety of strange features related to the ongoing collision. The 'true color' image reveals details of interactions between merging clusters and suggests unexpected physical processes at work.
Astronomers found a supermassive black hole actively heating and blasting gas in the galaxy J1430+1339, transforming it into an elliptical-type galaxy devoid of gas. The VLA observations revealed powerful jets and winds that remove or destroy raw material needed for star formation.
A study suggests some galaxies may shoot out gas early, causing them to redden and die prematurely. Researchers found that four galaxies approaching the end of star formation had expelled most of their gas.
The discovery of enormous radiation bubbles in the Milky Way's center may hold clues to understanding the galaxy's past and potentially revealing dark matter. Studies of these Fermi bubbles could offer insight into the history of our galaxy, including the activity of its black hole.
A team of astronomers has discovered a rare type of galaxy, named J1649+2635, that has prominent 'jets' of subatomic particles propelled outward from its core at nearly the speed of light. The unusual feature is unexpected in spiral galaxies.
Astronomers have discovered a galaxy, AzTEC-3, that gives birth to 1,100 suns annually, creating about three suns each day. This ancient galaxy is one of the earliest examples of a starburst galaxy, fuelled by massive material and galactic mergers.
Researchers at the University of Bonn and Cardiff develop a new observational strategy for imaging extremely distant galaxies, using ALMA radio telescope data. This method improves upon previous efforts by accurately estimating molecular hydrogen presence in these galaxies, providing insights into galaxy formation and star creation.
Astronomers discovered that nearby dwarf spheroidal galaxies lack star-forming gas, while those beyond a certain distance have abundant hydrogen. The Milky Way's gravity affects the composition of its smallest neighbors, shutting down star formation.
Research by Australian scientists reveals massive galaxies are eating smaller ones to gain weight, but their star-formation process is inefficient. Dr. Aaron Robotham explains that gravity allows larger galaxies to pull in smaller neighbors, and the Milky Way will follow suit, eventually merging with Andromeda.
The Milky Way galaxy is part of a new, massive galactic supercluster called Laniakea, which spans 500 million light-years and contains 100,000 galaxies. The discovery clarifies the boundaries of our local Universe and provides new insights into the motion of galaxies.
Astronomers have discovered that ALESS65 galaxy is running out of gas at an alarming rate, with only tens of millions of years left, much faster than the Milky Way's 5 billion years. The team found similar characteristics to nearby 'starbursting' galaxies in terms of UV radiation, suggesting a unique star formation process.
Astronomers have captured a rare and violent image of colliding galaxy clusters, revealing unique phenomena triggered by the collisions. The new observations provide insights into the complex interactions during cluster mergers.
Researchers found delicate strings of galaxies in previously thought-empty voids, revealing a new type of structure called 'tendrils'. This discovery suggests that voids might be smaller than initially believed, challenging our understanding of the universe's organization.
A new study proposes that fast radio bursts come from flaring stars in the Milky Way, contradicting previous theories of distant galactic origins. The researchers analyzed six detected bursts and found a correlation with stellar flares, suggesting a closer origin.
The Green Bank Telescope has captured detailed images of M82, highlighting streamers of material and dense molecular gas surrounding areas of intense star formation. Astronomers hope to understand the connection between dense gas and star formation by creating wide-angle maps of galaxy gas.
A massive gas cloud called the Smith Cloud is hurtling towards our Galaxy, and may be a key source of fuel for star formation. The cloud has been found to have a magnetic field that helps keep it intact, protecting it from disintegrating as it approaches the Galaxy's disk.
Astronomers observed a spiral galaxy with a strongly-emitting background galaxy nearly directly behind it. The alignment provides valuable data about the nearer galaxy, revealing it is not forming stars as rapidly as thought. Additional analysis also revealed detailed features of the galaxy's gas halo.
Astronomers have found strong evidence that a galaxy's central black hole is blowing massive amounts of gas out of the galaxy, limiting its growth and rate of star formation. The process, observed in a galaxy called 4C12.50, is thought to be key to understanding how galaxies develop and regulate the growth of their central black holes.
A new UMD-led study suggests that a burst of star formation in galaxies can blow out most of the remaining gas, resulting in a long period of starvation. This process is crucial in understanding the universe's surprising paucity of high-mass galaxies.
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.
Researchers used CSIRO's Australia Telescope Compact Array to study distant star-forming clumps and discovered massive amounts of molecular hydrogen gas, a key fuel for star formation. The telescope's upgraded bandwidth and sensitivity enabled the detection of carbon monoxide, allowing scientists to estimate galaxy star-formation rates.
Astronomers use a new stacking technique to detect faint signals from distant galaxies, revealing crucial information about the amount of hydrogen they contain. This technique allows for the detection of ancient galaxies and provides insights into the evolution of the Universe.
New study using VLBA reveals Local Arm is a significant branch of the Perseus Arm or an independent arm segment. The research uses parallax method to accurately measure distances and space motions.
A team of astronomers used the VLA to create a detailed image of the distant universe, revealing distinct galaxies with gorging black holes at their cores. The study found that 63% of background radio emission comes from galaxies with active black holes and 37% from star-forming regions.
Astronomers have uncovered a massive star factory in the universe's youth, producing stars at a rate 2,000 times that of our Milky Way. The galaxy, HFLS3, has a reservoir of gas and dust, with over 40 billion stars and 100 billion tons of gas.
Researchers used a CSIRO radio telescope to measure the temperature of an unnamed galaxy 7.2 billion light-years away, finding it was 5.08 Kelvin (-267.92 degrees Celsius). This confirms the Big Bang theory's prediction that the Universe's temperature drops smoothly as it expands.
Astronomers have discovered hundreds of previously-unknown sites of massive star formation in the Milky Way, including the most distant such objects yet found. These regions serve as markers of the Galaxy's structure and help refine its understanding.
Astronomers discovered a massive outburst in NGC 660, a spiral galaxy 44 million light-years away. The outburst was ten times brighter than the largest supernova and is likely caused by material pulled into a supermassive black hole at the center of the galaxy.
Astronomers have found gamma-ray flares originating 70 light-years away from a galaxy's central black hole, contradicting the long-held theory that such events occur only close to the black hole. The 2011 flares from galaxy 4C +71.07 provide the clearest evidence of this phenomenon.
A team of astronomers has mapped enormous outflows of charged particles from the centre of the Milky Way Galaxy, stretching over 50,000 light-years. The phenomenon is driven by many generations of stars forming and exploding in the Galactic Centre over the last hundred million years.
Scientists measured methanol molecule's radio spectrum in a distant galaxy, finding minimal change in proton-to-electron mass ratio over billions of years. The result confirms fundamental properties of molecules have remained consistent despite universe's evolution.
A team of astronomers discovered a 'missing link' of black holes in the Andromeda galaxy, shedding light on bright X-ray sources and ultraluminous X-ray sources (ULXs). The findings confirm that these ULXs are normal, everyday black holes with masses around ten times that of the Sun.
Researchers used Earth-orbiting X-ray telescopes to observe a bingeing black hole that expels powerful beams of material, solving the debate over whether ULXs are black holes gorging themselves or more massive ones eating sedately. The discovery provides key insights into how jets are produced by a binging black hole.
Astronomers have discovered a microquasar in the Andromeda Galaxy, a black hole devouring material from a companion star. The discovery provides opportunities for detailed studies to unravel the mystery of microquasars and their physics.
The study uses combined imaging power to unveil spectacular jets of the galaxy, powered by a 2.5-billion-solar-mass central black hole. The jets exhibit unusual ring-like structures and are composed of high-energy plasma beams, subatomic particles, and magnetic fields.
Researchers at Tel Aviv University develop method to observe stars that formed when the universe was 180 million years old. By detecting radio waves from hydrogen atoms, they reveal patterns in the sky indicating early galaxies, providing insight into the universe's origins.
The Phoenix Cluster, discovered by the NSF's South Pole Telescope, is creating stars at an unprecedented rate of 20 times faster than in other clusters. The cluster's central galaxy and super-massive black hole are undergoing unsustainable growth, adding mass quickly before it becomes unsustainable.
Recent studies with the Green Bank Telescope indicate that two neighbor galaxies may have had a close encounter. The discovery confirms a disputed finding from 2004 and shows six dense clumps of gas in the stream, strengthening the argument that they are part of a bridge between the two galaxies.
The Allen Telescope Array will continue searching for intelligent life in space and monitoring space debris under new management by SRI International. The facility will also support the SETI Institute's efforts to detect signals from newly discovered exoplanets.
These powerful telescopes enable forefront research in astrophysics, unlocking the secrets of star- and planet-formation processes. The new facilities will study gas and dust motion around young stars, testing theories of planet formation.
Researchers at the Max Planck Institute for Astrophysics have created a high-precision map of the Milky Way's magnetic field using radio observations from over 30 researchers and 41,000 measurements. The map reveals both large-scale and small-scale features of the Galactic magnetic field, including turbulence in the gas.
An international team of astronomers identified the moment when a black hole launched super-fast knots of gas into space using NASA's RXTE and NSF's VLBA radio telescope. The 'bullets' of ionized gas were thought to arise from a region outside the event horizon, where they were associated with changes signaling the start of the process.
Astronomers have discovered a unique spiral galaxy with massive jets, providing insights into the formation of galaxies and clusters in the early universe. The galaxy, dubbed Speca, has been found to exhibit three distinct episodes of jet activity, shedding new light on the processes that shaped these ancient structures.
Two studies reveal that the star was torn apart by intense tides as it approached the black hole, creating an unprecedented outburst of energy. The outburst produced X-rays and radio emissions that pointed straight at Earth, offering insights into relativistic beaming.
A CSIRO study reveals galaxies have less molecular hydrogen gas than in the past, leading to fewer stars forming. The decline in gas availability is linked to Dark Energy's acceleration of the Universe's expansion.
Researchers used radio telescopes to produce the most detailed image of particle jets erupting from a supermassive black hole in a nearby galaxy. The image shows features as small as 15 light-days across, making it the highest-resolution view of galactic jets ever made.
Researchers detect signal from the Epoch of Reionization, a period 13 billion years ago when the universe was dark and hydrogen gas dominated. The discovery provides insights into how the first galaxies formed and evolved, shedding light on the early universe's history.
Scientists have found a miniaturized galaxy with a single massive black hole, which produces radio jets that are much more efficient than previously thought. The discovery was made using CSIRO's Compact Array radio telescope and reveals that black holes can be both more powerful and more efficient.
Radio astronomers have developed a new technique for studying dark energy by mapping large-scale cosmic structures. This method, called intensity mapping, allows them to accumulate radio waves emitted by hydrogen gas in vast volumes of space, revealing insights into the nature of dark energy and its impact on the Universe's evolution.