Sentences with phrase «time around a black hole»

«eLISA will allow us to test fundamental concepts of black hole theory, since these signals can last very long and will allow us to sample the space - time around a black hole with unprecedented precision,» says Benjamin Knispel, a physicist and spokesman for the Albert Einstein Institute in Hanover, Germany.

It comes from the spinning space - time around the black hole and in fact it is not very well known, but that energy is there for the taking — up to 29 percent of the so - called rest mass energy of a spinning black hole is extractable — an d original conjecture, which is not, as I say [said], yet established fact, but certainly taken much more seriously than it was at that time — 10 or 15 percent of the rest mass energy of the black hole, about half of the spin energy, is in practice according to our conjecture, is in fact, the power source for these relativistically moving jets.

Not exact matches

The researchers found that relatively cool accretion discs around young stars, whose inner edges can be several times the size of the Sun, show the same behaviour as the hot, violent accretion discs around planet - sized white dwarfs, city - sized black holes and supermassive black holes as large as the entire Solar system, supporting the universality of accretion physics.

But in the extreme conditions around a black hole, time and space get so stretched that the two theories are forced to overlap.

Flashes of X-ray light near the center of the disk result in light echoes that allow astronomers to map the structure of the funnel - like flow, revealing for the first time strong gravity effects around a normally quiescent black hole.

That material would take up orbit around the black hole and give time for stars to form.

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.

Over time, it should detect tens or hundreds of cosmic rays from individual AGNs and their range of energies should clarify exactly how they were accelerated — a process thought to be controlled by magnetic fields around the colossal black holes.

That would be big enough to see gravitational waves emitted by any merging supermassive black holes that may have existed around the time when the universe's first stars began to shine, about a hundred million years after the big bang.

They are helping researchers study how drugs work against the swine flu virus and how space and time warp around colliding black holes.

«It's the first time that general relativity is really tested around a supermassive black hole,» says Aurélien Hees at the University of California, Los Angeles.

«Understanding how rotating black holes drag the space - time around them and how this process affects what we see through the telescopes remains a crucial, difficult - to - crack puzzle,» said Alexander Tchekhovskoy, assistant professor of physics and astronomy at Northwestern's Weinberg College of Arts and Sciences.

The black hole squeezes about 10 million times the mass of our Sun into a region only 30 times the solar diameter and it spins so rapidly that space and time are dragged around with it.

Each time a merger occurred, material from the new galaxy got incorporated into the accretion disk around the black hole, spinning in the same direction as the black hole and eventually contributing to its growth.

There maybe millions of such black holes floating around our own galaxy, eachfive or 10 times as massive as our sun and roughly 50 miles around, each spinning more or less furiously — once a millisecond or so would bepossible.

Before LIGO's detections, astronomers only had definitive observations of two varieties of black holes: ones that form from stars that were thought to top out around 20 solar masses; and, at the cores of large galaxies, supermassive black holes of still - uncertain provenance containing millions or billions of times the mass of the sun.

One theory suggests huge gas clouds around at the time collapsed into middleweight «seed» black holes.

Scientists can also do reverberation mapping, which uses X-ray telescopes to look for time differences between emissions from various locations near the black hole to understand the orbits of gas and photons around the black hole.

Based on the quasar's redshift, the researchers calculated the mass of the black hole at its center and determined that it is around 800 million times the mass of the sun.

The accretion disks around supermassive black holes (black holes with masses millions of times that of the Sun) are some of the brightest objects in the Universe.

By analyzing this time difference and by measuring how fast the material is moving around the center of the galaxy, they were able to determine the mass of this central black hole.

Until now, the biggest supermassive black holes — those with masses around 10 billion times that of our sun — have been found at the cores of very large galaxies in regions loaded with other large galaxies.

Those clumps, with masses ranging from around that of Neptune to several times that of Jupiter, are then flung away from the black hole at speeds of up to 10,000 kilometres per second, suggest simulations by James Guillochon and Eden Girma at Harvard University.

Wang, who did this NASA - supported work while on four - month sabbatical as a Raymond and Beverly Sackler Distinguished Visiting astronomer at the University of Cambridge, U.K., points out, «Now we have physically resolved it and for the first time we've made the connection observationally between the massive stars moving around black holes and the X-ray emitting material.

From its observed properties the star was determined to be about 0.8 times the mass of our Sun, and the mass of its mysterious counterpart was calculated at around 4.36 times the Sun's mass — almost certainly a black hole.

The object is known to have a mass of around 4 million times the mass of the Sun and is considered to be the central supermassive black hole of the Milky Way.

This work is very meaningful since the possibility that a number of «stray black holes» are floating around a supermassive black hole at the Galactic center was indicated by the observational study for the first time.

«We can now calculate very precisely how space and time are warped by the immense gravitational fields of a black hole, and determine how light and matter propagate around black holes», he remarks.

Hence, some astronomers believe that the conditions around those central black hole did not appreciatively changed much in that time, contrary to some theoretical expectations.

At the center of the galaxy sits Sagittarius A *, a supermassive black hole around four million times the mass of the Sun.

One of the stars, called S2, orbits Sgr A * every 16 years and zooms very close to the black hole — around four times the sun - Neptune distance.

«This allowed us to measure the time it takes for the black hole and the donor star to rotate around each other, which is 64 days, and to model the velocity of the two objects and the shape of the orbit,» Soria said.

The Milky Way is a barred spiral galaxy, and at the heart of this leviathan structure (it is believed) lurks a supermassive black hole known as Sagittarius A * (Sgr A *), with a mass of around 4 million times that of our Sun.

Early in 2002, S2 came very close to the black hole, coming within 17 light - hours or around three times the orbital distance of Pluto from the sun (or 39 AUs).

Creating a distraction by playing around with styling is probably the black hole that so much of my time goes to.

Deep in the heart of the spiral Milky Way galaxy, a hot vortex of matter swirls around a black hole more than a million times as massive as the sun.

Also nominated for Best Game Audio were Stack & Crack, a 3D puzzle game by Jambav from India; Orbit — Playing With Gravity, a game that has players launching planets and attempting to get them into stable orbits around black holes, by HIGHKEY Games from the United States; and Rumble League, a real - time, action packed strategy game by Lorraine Studio of the United States.