May 19, 2022

MoviesOnline

Complete Canadian News World

Do "primordial black holes" exist?

Do “primordial black holes” exist?

black holes They are objects so dense that not even light can escape from them – hence their name. They form when the fusion process stops, and nothing prevents the star from collapsing under its own weight anymore.

The black hole itself cannot be observed – it is simply black. When matter falls on the black hole, it begins to spin around it at a tremendous speed. This makes them emit strong radiation. Astronomers have already observed such phenomena dozens of times in the cores of galaxies.

primordial black holes It is the name of similar but much smaller objects. According to physicists, it should have appeared at the beginning of the universe’s existence, when matter was still densely packed (and then diluted by the expansion of spacetime itself).

Primordial black holes can have The size of a tennis ball and the mass of ten earth balls. The problem is that there is no evidence that such things exist. Physicists say their detection is almost impossible due to their extremely low weight and size.

There are hypotheses that such Primary black holes can form dark matter. It is known that 80 percent. Matter in the universe is invisible. But if this were not the case, the rotating galaxies would have had to disintegrate under the influence of the centrifugal force. This is the only evidence physicists have for the existence of dark matter.

Scientists argue in the Astrophysical Journal Letters that it is possible to detect such objects. If the original black hole collides with a star, it will devour it in no time. However , Neutron stars are very dense. A teaspoon of neutron matter can weigh billions of tons.

This will take longer for the black hole to move to the center of the neutron star. According to astrophysicists, a primordial black hole with a mass of Jupiter (or three hundred times the mass of Earth) would swallow a neutron star in 0.2 seconds. A black hole with the mass of a globe will devour such a star for just over three minutes.

Vibrations are generated when the primary black hole travels through a neutron star. Spacetime itself will also vibrate, i.e. Gravitational waves will be generated.

These are rare phenomena. Researchers estimate that current gravitational waves (American LEGO, European Virgo in Italy) will record one such event every 10 to 100,000 years.

It’s very sad, comments Yong-Feng Huang, one of the study’s authors. However, he adds, the planned gravitational wave detectors will be more sensitive. They may be able to record such a phenomenon within a few years.

It will be a huge attraction for physicists. You will solve three astrophysical puzzles simultaneously: The structure of neutron stars, the existence of primitive black holes and the nature of dark matteradds the world.

See also  The war in Ukraine. Publication of the Penal Code in the Journal of Laws. Goes, among other things to coal from Russia