Sentences with phrase «of bright quasars»

The scientists used the National Science Foundation's Very Long Baseline Array (VLBA), a continent - wide radio - telescope system, along with the 100 - meter radio telescope in Effelsberg, Germany, to make an extremely precise observation when the planet Jupiter passed nearly in front of a bright quasar on September 8, 2002.

Not exact matches

Quasars are bright disks of gas and dust swirling around supermassive black holes.

The question is, Which channel created the bulk of the bright ancient quasars that astronomers see?

And starting with seeds in this range alleviates the timing problem for the production of the supermassive black holes that power the brightest, most distant quasars.

The two black holes live roughly 3.7 billion light - years away in a quasar, the ferociously bright core of a galaxy lit up by...

Quasars are bright cores of distant active galaxies.

And when quasars [extremely bright, compact objects at the centers of some galaxies] were discovered in the early 1960s, it was obvious that the source of power had to be gravitational because even nuclear power, which powers the stars, is too inefficient.

The only way to make the quasars so bright, astronomers believe, is for supermassive black holes to devour gas at the hearts of large galaxies.

But the realization that quasars were really out at the edge of the observable universe, and thus must be far brighter than the brightest galaxy, posed a riddle that nobody has yet been able to answer with certainty: What are they?

It is the first time that a survey of quasars shows such bright halos around all of the observed quasars.

When the bright cosmic beacons known as quasars try to devour too much gas, they spew some of it deep into space in fierce jets.

Researchers were able to study the quasar (seen above) in detail, thanks to the magnifying effect of a gravitational lens — a massive galaxy cluster in front of it — that caused it to appear brighter than it would have otherwise.

The images revealed a bright quasar, the energetic signature of a black hole, residing far from the galactic core.

Quasars are incredibly bright powerhouses of radiation that are believed to be fueled by gas falling into a massive black hole at the core of a galaxy.

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

Previous research suggested these giants release extraordinarily large amounts of light when they rip apart stars and devour matter, and likely are the driving force behind quasars, which are among the brightest objects in the universe.

The first clue that supermassive black holes exist was the discovery several decades ago of quasars — extremely bright objects in the centres of distant galaxies.

Shining with the equivalent of 420 trillion suns, the new quasar is seven times brighter than the most distant quasar known (which is 13 billion years away).

Quasars can be hundreds of times as bright as their surrounding galaxy, yet they are smaller than our Solar System.

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.

Added Bram Venemans of the Max Planck Institute for Astronomy in Germany: «Quasars are among the brightest and most - distant known celestial objects and are crucial to understanding the early universe.»

Quasars are tremendously bright objects composed of enormous black holes accreting matter at the centers of massive galaxies.

Quasars are among the brightest and most - distant known celestial objects and are crucial to understanding the early Universe, added Bram Venemans of the Max Planck Institute for Astronomy in Germany.

Bañados was looking in particular for quasars — some of the brightest objects in the universe, that consist of a supermassive black hole surrounded by swirling, accreting disks of matter.

Between 20 and 100 quasars as bright and as distant as the quasar discovered by Bañados and his team are predicted to exist over the whole sky, so this is a major discovery that will provide fundamental information of the young universe, when it was only 5 percent its current age.

Astronomers had been able to spot the signature of specific molecules in the early universe before, but those observations were mostly confined to extremely bright objects such as quasars.

«The brightest quasars, probably hosting the most massive black holes, don't necessarily have to live in the densest regions of the universe,» she said.

Unimaginably powerful sources of radio emissions, brighter than entire galaxies, quasars were initially viewed as mysterious objects found billions of light - years from us but unknown in our own galactic neighborhood.

«We had expected we would see faint emissions right on top of the quasar, and instead we saw strong bright carbon emission from the galaxies at large separations from their background quasars,» said J. Xavier Prochaska, professor of astronomy and astrophysics at UC Santa Cruz and coauthor of the paper.

«However, the quasars are not bright enough now to account for what we're seeing; this is a record of something that happened in the past,» Keel said.

Quasars, discovered in 1963, are extremely distant massive black holes (MBHs) whose gravity pulls in immense amounts of nearby matter.24 The potential energy of all that infalling matter is converted to bright radiation, making quasars the most luminous stable objects in the unQuasars, discovered in 1963, are extremely distant massive black holes (MBHs) whose gravity pulls in immense amounts of nearby matter.24 The potential energy of all that infalling matter is converted to bright radiation, making quasars the most luminous stable objects in the unquasars the most luminous stable objects in the universe.

«Thirty - seven of the brightest galaxies were detected, including a quasar, but thousands of galaxies were probably in the string, according to astronomer Dr. Paul Francis who heads the team.

However, quasars are so rare and the nearest is so remote that the brightest of them, 3C273, about 2 billion lightyears away in the constellation Virgo, is only of magnitude 13.7, and none of them is in Messier's or even in the NGC or IC catalog.

So, instead of relying on this method, Melis» team used radio measurements to perform the work, which opened up a more reliable distance beacon: quasars, amazingly bright galactic cores powered by supermassive black holes.

Astronomers have discovered a new type of quasar — an incredibly bright galactic core powered by a supermassive black hole — that current theory fails to predict.

The plane to the far right shows the background galaxy and overlaid in the center of the galaxy is a bright white light representing a quasar.

Although quasars can be very bright, they are rare and are comparatively small, only a fraction of a light year across, whereas galaxies are quite common and provide a 100 million-fold increase in area to probe DLAs.

Astronomers also looked at how the light coming out certain of bright, distant galaxies, called quasars, filtered through these cobwebby strands.

The first stars lit up a few - hundred - million - years - long «Dark Age» with spectacular intensity, leading to the rapid creation of heavy elements and black holes that coalesced to form bright quasars (more).

Indeed, GRBs appear to emit produce even more energy than supernovae or even quasars (which are energetically bright accretion disks and bi-polar jets around supermassive black holes that are most commonly found in the active nuclei of some distant galaxies and possibly even in the pre-galaxy period after the Big Bang).

The remote quasars are so bright that they drown out light emitted by stars in their proto - galactic clump of stars (more illustrations).

Analysis of data collected by the Hubble and Chandra space telescopes and the Sloan Digital Sky Survey showed a bright quasar located far from its galaxy's core.

This deep image shows the nebula (cyan) extending across 2 million light - years that was discovered around the bright quasar UM287 (at the center of the image).

New radio images of galaxies with bright quasar cores show that, though the galaxies appear normal in visible - light images, their gas has been disrupted by encounters with other galaxies.

Subsequently, however, an even more distant quasar with a tentative redshift of z = 6.40 was announced on January 9, 2003, near the SDSS detection limit of a redshift of z ~ 6.5 for bright quasars, and other teams of astronomers detected even more distant, fast - star - forming irregular proto - galaxies, including: gravitationally - lensed HCM 6A behind galaxy cluster Abell 370 with a redshift of z ~ 6.56, which appears to be converting about 40 Solar - masses into stars annually; (PhysicsWeb; IFA press release; Hu et al, 2002, in pdf; and erratum); and the possible «superwind - galaxy» LAE J1044 - 0130 (Subaru press release; and Ajiki et al, 2002, in pdf).

«However, the quasars are not bright enough now to account for what we're seeing; this is a record of something that happened in the past,» Bill Keel of the University of Alabama, Tuscaloosa, who initiated the Hubble survey, said in a statement.

The four quasars — extremely bright masses of light and energy that exist only in the farthest reaches of the known universe — were found huddled together in a nebula 10 billion light - years away, the first time four quasars have ever been spotted so close together, according to the atronomers» findings published Friday in the journal Science.

The galaxy hosts a bright quasar that may have illuminated the ghostly structure by hitting it with a beam of light from hot gas around a central black hole.

The halos around quasars — the brightest and the most active objects in the universe, they are galaxies formed less than 2 billion years after the Big Bang; they have supermassive black holes in their centers and consume stars, gas, interstellar dust and other material at a very fast rate — are made of gas known as the intergalactic medium and extend for up to 300,000 light - years from the centers of the quasars.

The observation of these quasars, selected from among the brightest observable by MUSE, threw up another surprising find.