Sentences with phrase «process as a black hole»

Not exact matches

The study, «Accretion - induced variability links young stellar objects, white dwarfs, and black holes», which is published in the journal Science Advances, shows how the «flickering» in the visible brightness of young stellar objects (YSOs)-- very young stars in the final stages of formation — is similar to the flickering seen from black holes or white dwarfs as they violently pull matter from their surroundings in a process known as accretion.

Four decades ago, he realized that a black hole's event horizon is inherently leaky; quantum processes allow a slow but steady flow of particles away from the black hole, a process now known as Hawking radiation.

Supermassive black holes do the same, and if similar processes are behind the bursts, watching Cygnus X-3 could tell us how they develop as they gobble up matter from their surroundings.

The process of black hole formation was first described by J. Robert Oppenheimer and Hartland Snyder in the same issue of the Physical Review as Bohr and Wheeler's fission paper.

The snag is that to run this process backwards and make the eternal black hole, you would need to send in a precisely crafted burst of radiation as the hole forms.

The process will likely shrink the small black holes into an ever - tighter clump around the supermassive black hole as time goes on, says astrophysicist Abraham Loeb of Harvard University in Cambridge, Massachusetts.

For many aspects of the simulation, researchers can start their calculations at a fundamental, or ab initio, level with no need for preconceived input data, but processes that are less understood — such as star formation and the growth of supermassive black holes — need to be informed by observation and by making assumptions that can simplify the deluge of calculations.

In the early universe, galaxies collided relatively often and their black holes sometimes merged, growing more massive in the process and sometimes birthing hugely energetic objects known as quasars.

Dopita describes the process as a kind of cosmic indigestion: «It is as if the black hole sucks in too much, too quickly, and it burps out gas.»

That process, now known as Hawking radiation, explains why we do not have to fear any mini black holes created by the Large Hadron Collider; they would «evaporate» into radiation almost instantly.

Therefore, the black hole remnants would be produced at an infinite rate; even such everyday physical processes as turning on a microwave oven would generate them.

By tracking the positions and properties of hundreds of millions of randomly distributed particles as they collide and annihilate each other near a black hole, the new model reveals processes that produce gamma rays with much higher energies, as well as a better likelihood of escape and detection, than ever thought possible.

The concept is a variant of the Penrose process, first identified in 1969 by British astrophysicist Sir Roger Penrose as a mechanism for extracting energy from a spinning black hole.

The merger of two black holes, such as the one which produced the gravitational waves discovered by the LIGO Observatory, is considered an extremely complex process that can only be simulated by the world's most powerful supercomputers.

But a satiated black hole effectively has zero temperature, barring a trickle of particles released by a process called Hawking radiation, meaning it could potentially act as a cold sun, says Opatrný.

The feeding process is somewhat similar to what happens around supermassive black holes, but isn't as big and messy.

In the case of a black hole in the vicinity of a Schwarzschild sphere there are no stationary potentials as there is a constant process of collapse, the boundary of the «hole» moves away and the energy spectrum is continuous.

It is this twisted field that accelerates particles away from the black hole as jets and, in the process, extracts energy from the rotation of the black hole.

As we noted, the LHC will not destroy the world and as George Musser wrote to me after we recorded the interview, «I said something to the effect that scientists had stocked [stoked] concerns about black holes by saying the LHC would create particles not seen since the big bang, but those particles have been seen since the big bang, namely in natural processes such as cosmic ray collisions; therefore if black holes posed a threat, the universe would already be a goner.&raquAs we noted, the LHC will not destroy the world and as George Musser wrote to me after we recorded the interview, «I said something to the effect that scientists had stocked [stoked] concerns about black holes by saying the LHC would create particles not seen since the big bang, but those particles have been seen since the big bang, namely in natural processes such as cosmic ray collisions; therefore if black holes posed a threat, the universe would already be a goner.&raquas George Musser wrote to me after we recorded the interview, «I said something to the effect that scientists had stocked [stoked] concerns about black holes by saying the LHC would create particles not seen since the big bang, but those particles have been seen since the big bang, namely in natural processes such as cosmic ray collisions; therefore if black holes posed a threat, the universe would already be a goner.&raquas cosmic ray collisions; therefore if black holes posed a threat, the universe would already be a goner.»

Specifically, the most energetic iron emission they studied is characteristic of so - called x-ray binary starsduos comprised of a dense stellar object such as a white dwarf star, a neutron star or a black hole that collects matter from a less dense companion, emitting x-rays in the process.

After processing and correlating the data, they will obtain either a glorious silhouette of the black hole against the brilliant matter swirling around it or, as in earlier attempts using fewer telescopes, a tantalizing blur.

«This is an indication that the [black hole] ejection process is not as efficient as we thought.»

If the black hole has gas or stars to «eat,» that process generates large amounts of energy as the infalling gas is compressed and heated to high temperatures.

The process of converting mass to energy from falling onto a black hole has an efficiency that is over ten times as large as the efficiency of nuclear fusion.

The Expanded VLA will allow scientists to tackle important outstanding questions such as the formation processes of stars and planets; the nature of black holes and the phenomena surrounding them; and the nature of the early universe.

Stephen Hawking theorized in 1974 that black holes radiate small numbers of particles (mainly photons), a process known as «Hawking Radiation».

The DFS highlights three areas of particular concern: ensuring payments are processed quickly to build user confidence that money will not «get stuck in a digital black hole»; ensuring virtual currencies do not become the tool of choice for terrorists, drug smugglers, illegal weapons dealers, money launderers, and human traffickers; making sure that the use of bitcoin as an investment is governed properly.

I have often heard job seekers refer to the application process as a «black hole where resumes go, never to be heard from again».