Black Hole V404 Cygni shows weaker magnetic field than ever thought


Scientists have tried to understand black holes since their discovery. Their infinite gravity allows them to attract and devour any planet or other space object that is nearby. Not even light can escape its reach. More or less, it is one of the most fascinating phenomena in space. Now, scientists have discovered something that could help understand how the magnetic field works around black holes, and with respect to the black hole V404 Cygni.

  Black hole V404 Cygni
insspirito / Pixabay

As you already know, it is said that the area in and around these mbadive black holes doubles the laws of physics, and that is one of the reasons why It is risky for close exploration. However, they vary in size. While some are the size of our Sun or are a bit larger, there are some supermbadive black holes, probably located in the center of all the giant galaxies in the universe. In addition, it is believed that they are of crucial importance in the way galaxies are formed and evolve. It is believed that black holes are formed mainly after the death of huge stars or a fusion of neutron stars or when a neutron star collides with another black hole. This emerging is also known to produce gravitational waves.

In new research published in Science by a team of scientists at the University of Florida (UF), it seems that the magnetic fields of black holes may not be as mbadive as previously believed. They were observing the black hole V404 Cygni, which has a distance of 8,000 light years from Earth. They were measuring the magnetic field that surrounded the black hole, and concluded that it was 400 times less than previously thought.

So that they could understand how matter acts when exposed to extreme conditions, scientists observed the "jets" of particles that shoot out of the magnetic field of black holes with a speed close to that of light, while others particles are absorbed by the black hole.

"The question is, how do you do that?" Co-author of the study Stephen Eikenberry, professor of astronomy at the College of Liberal Arts and Sciences of the UF, said in a statement on the website. "Our surprisingly low measurements will force new constraints on theoretical models that previously focused on strong magnetic fields that accelerate and direct jet streams – we did not expect this, so it changes a lot from what we thought we knew."

Researchers used measurements collected in 2015, when the black hole had a burst of those jets, which is rare. They used the 34-foot Big Canary Telescope, which is the largest telescope in the world, co-owned by UF in the Canary Islands of Spain. The bursts happen suddenly and do not last long, said the study's lead author Yigit Dalilar and co-author Alan Garner, doctoral students in the UF's astronomy department. The outbreaks of the black hole V404 Cygni of 2015 lasted a couple of weeks, while the same black hole had a similar event that happened in 1989.

"Observing it was something that happens once or twice in the race," Dalilar said. . "This discovery puts us one step closer to understanding how the universe works."

Although the magnetism of black holes may be weaker than previously thought, its gravitational attraction remains extreme, confirmed Neil DeGrbade Tyson, director of the Hayden Planetarium at the American Museum of Natural History.




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