Sentences with phrase «powered by a black hole»

Another culprit might be active galactic nuclei (AGN), which are blazingly strong light sources powered by black holes.

The ideal background «lights» for such a study are quasars, which are very distant bright cores of active galaxies powered by black holes.

Powered by a black hole of 2 billion solar masses, the quasar appears as it did 12.9 billion years ago, when the universe as humans know it was just beginning to emerge from the Big Bang.

Each was powered by a black hole weighing from 1 million to 100 billion times the mass of the sun.

A study in the journal Astronomy & Astrophysics finds that a distant quasar, powered by a black hole, is building a galaxy that will eventually surround the black hole.

Super-bright galaxies powered by black holes have helped astronomers come up with the most accurate distance yet to the iconic Pleiades star cluster.

An artist's impression shows a very distant quasar powered by a black hole with a mass two billion times that of the Sun.

(Some were quasars which are powered by black holes, billions of times more massive than our Sun!)

NATARAJAN: We see bright beacons in the universe — quasars — in place powered by black holes that are roughly a billion times the mass of our sun in the young universe, just a billion years or so after the Big Bang.

Not exact matches

A quasar is powered by an enormous black hole that steadily consumes a surrounding disk of gas and dust.

Chris Huhne, at Energy and Climate Change, has started to lobby for special treatment by announcing the discovery of a # 4bn black hole in his budget for the cost of decommissioning nuclear power stations.

Black - hole - powered galaxies called blazars are the most common sources detected by NASA's Fermi Gamma - ray Space Telescope.

Astronomers studying distant galaxies powered by monster black holes have uncovered an unexpected link between two very different wavelengths of the light they emit, the mid-infrared and gamma rays.

He notes that the model was originally developed for active galactic nuclei — outbursts powered by supermassive black holes — so there is no reason to think it must also apply to gamma - ray bursts.

On a larger scale, many black holes fire out huge jets of energetic matter, powered by magnetic fields.

One possibility was that they are spat out by «active galactic nuclei» (AGNs)-- energetic galaxies powered by matter swirling onto a supermassive black hole.

About 12 billion years ago, the gas warmed from 8000 to 15,000 kelvin, probably due to heating from quasars, objects powered by giant black holes, the team will report in Monthly Notices of the Royal Astronomical Society.

They could have emerged from gamma - ray bursts, mysterious and short - lived cataclysms that briefly rank as the brightest objects in the universe; shock waves from exploding stars; or so - called blazars, jets of energy powered by supermassive black holes.

A strange green blob in the nearby universe may be a «light echo» from a long - dead quasar — an extremely bright object powered by a colossal black hole.

Quasars are considered «active» galaxies because the bright objects are powered by supermassive black holes that are devouring their surroundings.

Long known for their obliterating power, black holes may also have been a creative force: New evidence suggests that they gave order to the chaotic mess produced by the Big Bang.

The idea that quasars are powered by the accretion of matter onto black holes was proposed within months after the discovery of quasars.

Many distant quasars — luminous galaxies, thought to be powered by large central black holes — are known to contain warm dust, which glows at infrared wavelengths.

Astronomers see hints that two distant quasars, beacons of energy powered by matter spiraling into gigantic black holes, are wrapped in cocoons of gas the size of our Milky Way.

Fermi has shown that much of this light arises from unresolved gamma - ray sources, particularly galaxies called blazars, which are powered by material falling toward gigantic black holes.

The emission instead originates from an active galactic nucleus that is powered by a supermassive black hole.

A team of astronomers has doubled the number of known young, compact radio galaxies — galaxies powered by newly energized black holes.

The winds powered by these supermassive black holes could come and go quickly.

Astronomers have uncovered a supermassive black hole that has been propelled out of the center of a distant galaxy by what could be the awesome power of gravitational waves.

To probe the cloud, the team used an even more distant quasar — a hugely bright light source powered by a supermassive black hole — as a backlight.

Detailed comparison of new observations and supercomputer simulations has only now allowed researchers to understand how this can happen: the gas is first heated to temperatures of tens of millions of degrees by the energy released by the supermassive black hole powering the quasar.

They are powered by supermassive black holes at the centre of galaxies, surrounded by a rapidly spinning disk - like region of gas.

Astronomers have observed tornadolike winds powered by a central active supermassive black hole, such as the one in this image, pervading a galaxy.

Two teams of astronomers led by researchers at the University of Cambridge have looked back nearly 13 billion years, when the Universe was less than 10 percent its present age, to determine how quasars — extremely luminous objects powered by supermassive black holes with the mass of a billion suns — regulate the formation of stars and the build - up of the most massive galaxies.

But recently, a survey has found several quasars — bright cores of galaxies, powered by matter falling into a supermassive black hole — that existed less than a billion years after the big bang.

In his book A Brief History of Time, Stephen Hawking proposed a black hole power generator, where black holes swallow matter and then convert matter into radiation by evaporating, but there are major challenges with making this process fast enough to be useful.

Scientists have discovered the brightest quasar in the early universe, powered by the most massive black hole yet known at that time.

In some active galactic nuclei, you have a black hole and accretion disk and the majority of the power is associated with these outflowing jets, far more than is associated with the radiant energy that is emitted by the accretion disk and the hot gas surrounding it.

«By comparison, our own Milky Way galaxy has a black hole with a mass of only 4 million solar masses at its center; the black hole that powers this new quasar is 3,000 time heavier,» Fan said.

Quasars are young galaxies powered by massive black holes, extremely bright, extremely distant, and thus highly redshifted.

Meanwhile, scientists were becoming convinced that quasars and Seyfert galaxies were powered by supermassive black holes constituting, respectively, the mass of billions and tens of millions of suns.

In 2009, two researchers proposed a highly theoretical spacecraft powered by multiple mini-black holes — the smaller a black hole is, the more energy it produces.

Nobody is sure, but attention will now shift to active galactic nuclei powered by supermassive black holes.

Attention will now shift to active galactic nuclei (AGN), which are powered by supermassive black holes.

Quasars are believed to be powered by accretion of material onto supermassive black holes in the nuclei of distant galaxies, making these luminous versions of the general class of objects known as active galaxies.

«The discovery that these very bright objects, long thought to be black holes with masses up to 1,000 times that of the sun, are powered by much less massive neutron stars, was a huge scientific surprise,» says Fiona Harrison, Caltech's Benjamin M. Rosen Professor of Physics; the Kent and Joyce Kresa Leadership Chair of the Division of Physics, Mathematics and Astronomy; and the principal investigator of the NuSTAR mission.

Quasars constitute a brief phase in the galactic life - cycle, during which they shine as the most luminous objects in the Universe, powered by the infall of matter onto a supermassive black hole.

There have been many reports saying that the ionized gas outflow driven by the accretion power of a supermassive black hole has a great impact on surrounding molecular gas (e.g., * 2,3).

Quasars are very luminous objects powered by accretion of gas into supermassive black holes at the centers of distant galaxies.

While the jets from galaxy cores are thought to be powered by supermassive black holes millions of times more massive than the Sun, the closer «microquasars» are powered by much smaller black holes or by neutron stars only a few times more massive than the sun.