By comparing these results with standard models, the astronomers concluded that the most likely cause was the gravitational pull of a dense, massive object
such as a black hole.
The idea proposed by the three physicists offers a new strategy for addressing a long - standing conundrum in physics
known as the black hole information paradox.
And, theoretically, any star at least 25 times bigger than the sun will end its
life as a black hole.
Much as a black hole's mass increases when anything with positive energy falls in, its mass decreases when a particle with negative energy falls in.
In law firms especially, the library is seen as a cost centre that generates no revenue, or
even as a black hole that into which money simply disappears.
The telescope shall participate in high - resolution imaging of cosmic radio sources,
such as black holes and star forming regions.
Everything should get bigger
as the black hole gets bigger, team member Eric Perlman of the University of Maryland comments.
When a star passes within a certain distance of a black hole, the stellar material gets stretched and compressed
as the black hole swallows it, briefly releasing an enormous amount of energy as a flare.
They hope to find tiny stutters in these natural clocks caused by the gravitational wake of a massive event, such
as a black hole in orbit around another star.
Eventually,
as the black hole evaporated perhaps a trillion trillion trillion trillion years later (astronauts in thought experiments have remarkable longevity), the astronaut outside the black hole would see the Hawking radiation associated with the infalling particle.
As
long as the black holes get a just little closer than their final separation in the simulation, they will start giving off gravitational waves — ripples in space - time that carry energy away — which would then guarantee a final merger, he says.
The result, says Bekenstein, is a «gradual information outflux» with «the black hole entropy becoming gradually less and less» until in the end it
vanishes as the black hole vanishes.
That fact implies a conundrum known
as the black hole information paradox (SN: 5/31/14, p. 16): When the black hole evaporates, where does the information go?
«It's really hard to torque a black hole around by a large amount without having something as
massive as another black hole slam into it,» says astrophysicist Scott Hughes of the University of California, Santa Barbara, co-author of a forthcoming independent analysis that draws similar conclusions.
One of the weirdest implications of Einstein's general relativity theory is that
as a black hole spins, it pulls space - time along.
But here is the real brainteaser: If the particle enters in the same
direction as the black hole's spin, it joins an «outgoing beam» that has negative energy and moves backward in time.
Hints of their existence came from either X-ray emissions — thought to arise
as the black holes consumed their companion stars — or the motion of stars near the centre of some clusters (see Middleweight black holes are «missing link»).
This illustration shows the merger of two black holes and the gravitational waves that ripple outward
as the black holes spiral toward each other.
A discovery would confirm one of general relativity's most extraordinary predictions and provide an unprecedented glimpse of cataclysmic events such
as black hole mergers.
Tech will enable future x-ray missions to detect high - energy astrophysical sources such
as black hole winds and hot gas in the cosmic web.
I had never seen him before Revolutionary Road, but he stuck out right
away as a black hole of talentless suck from the moment his scenes began.
Dubbed IceCube, this novel project built in the Antarctic ice will map cosmic neutrinos, nearly massless particles with no electric charge that stream from such mysterious
entities as black holes, dark matter, and exploding stars.
For most of us, Hannibal Lecter is neither comprehensible nor tempting, and focusing on his ilk is a form of comfort: evil is as terrifying, alien and
inscrutable as a black hole worlds away.
As the black holes drew near in a deepening pit of spacetime, they also churned up that fabric, emitting gravitational radiation (or gravity waves, as scientists often call them).
This is intriguing, but, as long
as the black hole continues to exist, we do not need to worry about what might have happened to the information, or entropy, associated with the original star.
Using models of black hole dynamics, scientists have been able to estimate that
as a black hole rips a star apart, the resulting tidal disruption flare can produce X-ray emissions very close to the black hole.
And the signal they heard was both clear and complete, encompassing not just the insprial and collision, but what's called the «ringdown,» the
aftershock as the black hole settles into its new shape.
This has the same
effect as a black hole's event horizon, the point of no return for light: an observer outside an event horizon could see nothing inside, as no light can escape the black hole's gravity to cross the horizon to the universe outside.
This waveform is very distinctive, and features a pattern in which both frequency and amplitude
increase as the black holes approach each other, orbiting ever faster.
As
well as this black hole, Messier 15 is known to house a planetary nebula, Pease 1 [4]-- and it was the first globular known to contain one of these objects [5].
Ten linked equations — Einstein's field equations — describe precisely how space - time is curved for any given distribution of matter and energy, even for something as
extreme as a black hole.
MHD simulations, the magnetism of electrically conducting fluids such
as black hole jets, add a layer of understanding but are notoriously difficult for even the fastest supercomputers.
Previous estimates put the mass of the black hole at some 3 billion times the mass of our sun, still nearly 1000 times as massive
as the black hole at the center of the Milky Way.
To spot the black hole's event horizon, a team of astronomers — led by Michael Garcia and Ramesh Narayan of the Harvard - Smithsonian Center for Astrophysics in Cambridge, Massachusetts — watched what
happened as a black hole stole gas away from a nearby star.