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Physicists are still looking for primitive black holes to solve the dark matter problem



For some time, physicists have been looking for primitive black holes, which may be strange objects formed in the early universe, and have produced a series of cosmic hoaxes.

Physicists from the University of California, Los Angeles and the Kavli Institute of Physics and Mathematics of the Universe in Japan used a giant 8.2-meter-wide (27-foot) telescope to look for signs of these objects. The discovery of them may even imply that our universe itself is just a young baby, reproducing the baby universe.

What they want to see will not be as ugly as peeping at reality. However, if their new model is correct and patient enough, they may find a primitive black hole (PBH) floating between us and nearby galaxies.

The discovery of such objects may fill the gaps in our knowledge of a range of phenomena, from the properties of dark matter to the distribution of heavy elements throughout space.

Even more fascinating is that this may also be a clue to whether our own universe is just one of the many universes in the multiverse branch tree that was born as a baby during the inflation of the universe-although there is still much debate on this point.

Primitive black holes have many things in common with the usual black holes formed by the collapse of stars. For example, they are all intense concentrations of matter, and they compress the surrounding space-time into a singular point.

Singularity itself is an object of curiosity, composed of points made up of the finer measures of space warping physics of general relativity and quantum mechanics. Unfortunately, the two main theories are not inconsistent in some key details of reality, so no one can be sure of what is strange.

Even the distortions of the surrounding space and time mess up our intuition, giving us room to speculate that each black hole is the umbilical cord of a completely independent universe.

It doesn̵

7;t sound far-fetched. There are many good reasons to think. Once the stumbled observer crosses the line of sight of the event (a route without turning back), space and time cannot be distinguished from the ever-expanding universe like ours.

That means that whenever a star collapses and forms a singularity, our universe becomes a parent. Mazel TV!

The difference with PBHs is that they may be reproduced when our universe is about one second old, when radiation dominates (and not much other radiation).

If there is enough thrust in any area, then the concentrated light may form a singularity above the edge. And because the conditions are already extreme, the required mass will be much lower than that of the smallest stellar black hole.

Primitive black holes are an interesting idea that desperately needs reliable evidence. Unfortunately, smaller holes will evaporate for a long time due to Hawking radiation. So far, we must have noticed anything large enough.

But researchers may still rule out this possibility.

In this new model, the research team returned to a theory that quantum effects in empty space create vacuum bubbles that provide seeds for collapse.

Their mathematics suggests that these conditions during periods of rapid inflation may reasonably produce a range of primordial black holes of mass. Interestingly, some can meet our expectations for dark matter.

This is an old idea that has been proposed for some time, and to some extent, it seems unlikely to be a candidate. If these tiny black holes do behave like dark matter, then they may only account for part of it.

It just adds to the skepticism. The team has also tried this method to search for these objects before.

Last year, researchers used the Hyper Suprime-Cam of the Subaru telescope to collect nearly 200 snapshots of our neighboring galaxy, the Andromeda Galaxy, over the course of seven hours. The purpose was to see if the PBH with our own mass would drift by .

Except for a “maybe”, the experiment did not find anything exciting.

However, for this new model, the researchers believe that if we wait longer (for example, 88 hours or so), we may be lucky this time. Or at least rule out their predictions.

Identifying such a large primordial black hole will provide cosmologists with an object that can help explain a series of confusing problems. Not only does it contribute to our understanding of dark matter, but their collisions with neutron stars can also explain rapid radio bursts.

We may have seen the collision between these light black holes in the sign of a gravitational wave event, which has all the characteristics of neutron star mergers without flash.

Regarding whether these ancient black holes really contain babies in our own universe, we need some quite revolutionary physics to confirm. However, the black hole produced in this case is exactly what we are looking for.

Fingers crossing Hyper Suprime-Cam may contribute to the family album.

This research is published in Medical letter.


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