A cosmic phenomenon on a colossal scale, resulting from the acceleration of a gas
cloud by a black hole and its reacceleration by the shock waves from the merging of two galaxy clusters, has been observed, described and interpreted by an international collaboration of astronomers that included three Brazilians: Felipe Andrade - Santos, Vinicius Moris Placco, and Rafael Miloni Santucci.
Not exact matches
In December 2011, astronomers identified the gas
cloud, called G2, and found that its orbit would bring it perilously close to the Milky Way's central
black hole by mid-2013.
Nevertheless, those modest - size
black holes left a big mark
by performing a form of stellar birth control: Radiation from the trickle of material falling into the
holes heated surrounding
clouds of gas to about 5,000 degrees Fahrenheit, so hot that the gas could no longer easily coalesce.
It is orbited
by a small group of bright stars and, in addition, an enigmatic dusty
cloud, known as G2, has been tracked on its fall towards the
black hole over the last few years.
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.
Sagittarius A *'s immense gravity is accelerating the
cloud dramatically: in 2004, the
cloud was hurtling toward the
black hole at 1200 kilometers per second;
by 2011, the speed had nearly doubled, reaching 2350 kilometers per second.
Astronomers are missing as many as one - third of
black holes by looking with the wrong telescopes, according to a new study which finds that massive
black holes may be hiding behind thick
clouds of dust and gas in the centers of galaxies.
By analyzing the gas motion of an extraordinarily fast - moving cosmic
cloud in a corner of the Milky Way, astronomers found hints of a wandering
black hole hidden in the
cloud.
In the new observations, certain wavelengths seem to be absorbed
by fast - moving gas
clouds, presumably debris from a doomed star: relatively cool gas laden with ionized carbon and silicon, flowing away from the
black hole with a velocity of some 6000 kilometers per second.
Now a team led
by Fabio Pacucci at Scuola Normale Superiore in Pisa, Italy, thinks it has found two examples of the latter: baby
black holes that formed directly from a collapsing gas
cloud without becoming a star first.
The researchers conclude that galaxies may thus be formed
by clouds of gas that are bombarded
by streams of matter and energy from
black holes — which are building their own homes.
Astronomers believe it was shot from the Large Magellanic
Cloud by an as - yet - unseen
black hole.
«Ripped apart
by a
black hole: Gas
cloud makes closest approach to monster at center of Milky Way.»
New observations from ESO's Very Large Telescope show for the first time a gas
cloud being ripped apart
by the supermassive
black hole at the center of the galaxy.
Because it takes time for the X-rays to reach the
cloud, some of them were still arriving and making it glow when it emitted the light Van Arkel saw, even though the
black hole was
by then quiet.
This
cloud is now making its closest approach and new VLT observations show that it is being grossly stretched
by the
black hole's extreme gravitational field.
The
clouds were probably energised
by nearby monster
black holes that had blasted them with intense radiation.
New observations from ESO's Very Large Telescope show for the first time a gas
cloud being ripped apart
by the supermassive
black hole at the centre of the galaxy.
According to the researchers, there are two possible scenarios in which such a
cloud could have been created — the first one that involves the expanding gas shell of the supernova remnant passing
by a static
black hole, and the other wherein a fast - moving
black hole plunges through a
cloud of dense gas that is then dragged along
by the former's strong gravity.
See images of new observations from ESO's Very Large Telescope showing a gas
cloud ripped apart
by the supermassive
black hole at the center of our galaxy, the Milky Way.
Astronomers using the National Science Foundation's Very Long Baseline Array (VLBA) of radio telescopes have discovered a
cloud of gas apparently being struck
by a jet of ultrafast particles powered
by the energy of a supermassive
black hole at the core of a galaxy 450 million light - years away.
Astronomers using the National Science Foundation's Very Long Baseline Array of radio telescopes have discovered a
cloud of gas apparently being struck
by a jet of ultrafast particles powered
by the energy of a supermassive
black hole at the core of a galaxy 450 million light - years away.
Astronomers looked at it and realized she had spotted something they had never seen before: a gas
cloud as big as our solar system, illuminated
by energy from a nearby galaxy's
black hole [source: Plait].
Using data from three of NASA's Great Observatories (the Hubble Space Telescope, Chandra X-ray Observatory, and Spitzer Space Telescope), scientists have found the best evidence to date that supermassive
black holes in the early universe were produced
by the direct collapse of a gas
cloud.
An image of
clouds accelerating due to gravitational scattering caused
by the intermediate - mass
black hole.
SDSS studies have probed the dark matter environments of quasars through clustering measurements, revealed populations of quasars whose central engines are hidden
by obscuring dust, captured changes in quasar spectra that show
clouds moving in the gravitational grip of the central
black hole, and allowed a comprehensive census of the much fainter accreting
black holes (active galactic nuclei, or AGN) in present - day galaxies.
These supermassive
black holes sustain themselves
by swallowing stars, planets, asteroids, comets and
clouds of gas that wander
by the crowded galactic core.
In Odorless Rot, 2011, the
cloud is sulfurous yellow, given depth
by sponged - on
black paint that carves out eye
holes and a mouth.
This illustration provided
by Columbia University shows the supermassive
black hole Sagittarius A, located at the center of the Milky Way Galaxy, surrounded
by a
cloud of dust and gas within which are 12 smaller
black hole...
When you apply online, most resumes go into large and complex
cloud - based applicant tracking systems and are lost «in the
black hole» if your resume doesn't have the right keywords and phrases to be found
by internal human resources recruiters and talent acquisition specialists.