Scientists have restricted the size limit of black holes

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Even gluttons can’t eat forever. When black holes at the hearts of galaxies swell to 50 billion times the mass of our Sun, they can lose the disks of gas that is used as a space feedlots. The majority of galaxies in the center is a supermassive black hole. Around it is a region of space in which the gas settles into a disk orbiting. This gas can lose energy and fall inward, skamlova black hole. But these disks are considered volatile and prone to gather in the stars.

Theoretically a black hole can grow so big that will absorb the stable part of the disc and destroy it. However, most people believe that black holes could not attain this size. “Not to worry, because it requires tremendous weight,” says Andrew king of the University of Leicester in the UK.

And still had the implication that there must be a limit. In 2008, an independent panel headed by Priya Natarajan from Yale University and Iezekiel Trastero from the University of Concepcion in Chile, has estimated how many black holes were supposed to feast in the early Universe and how much is left of free gas, which they could absorb in recent times.

Considering how many black holes ate at the dawn of the Universe, scientists argued, the most greedy of them could grow to the size of 50 billion solar masses.

The discovery of a huge black hole over the past few years have induced the king to come back to this issue. The heaviest black holes, which we have seen, have a mass of 40 billion solar, and on the basis of this king calculated how big could become a black hole to its outer edge prevented the formation of a disk. He also came to the conclusion 50 billion solar masses, confirming the previous findings.

Without the disk the black hole would have stopped in growth, therefore, is its upper limit. The only way to get her to become even more — if the right fell on it a star or it merged with another black hole. But no process feeds it effectively so, as the gas disk. “If you won’t merge with another monster, you will not notice almost no difference in the mass of the black hole,” says king.

Although Natarajan reached the same limit, she thinks that the approach of the king may be somewhat simplistic. King’s calculations focused on the stability of the gas disk, but Natarajan says you can’t also ignore the amount of gas around the black hole.

As the gas flows down in a spiral into a black hole, it radiates remnants of the disk by x-rays, clearing the environment — and, hence, the black hole, which is fed with too quickly could choke on your food so that it will release gases and sweep away the whole table. The number of available gas helps determine when it will happen.

“It is necessary to take into account the environment of the galactic center, which is a black hole, says Natarajan. — It is not enough just to look at gravitational stability.”


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