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What is a double black hole?

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According to researchers, even if they can classify binary black holes, they still cannot determine the specific origin that created them, Science Alert reported.

In a recent study published in the journal Astronomy and Astrophysical Letters, a team of researchers from the Massachusetts Institute of Technology (MIT) examined 69 binary black holes to determine their origin. As a result, they found that the origin changed depending on the model planets.

“When you change the model more flexibly or make different assumptions, you will get a different answer about how black holes form in the universe.”said Silvia Biscoveanu, an MIT graduate student who works in the LOGO Lab and co-author of the study.

Definition of a binary black hole

Like a double star, IA double black hole consists of two massive objects orbiting each other. Both have the ability to collide or merge. However, black holes are sometimes formed from massive meteors that are no longer active or are no longer active. “is dying”.

However, The origin of the formation of binary black holes remains a mystery. So far, there are two hypotheses related to their formation: “binary field evolution” and “dynamic assembly”.

A binary black hole forms at the center of a dense star cluster.
A binary black hole forms at the center of a dense star cluster.

A binary black hole forms at the center of a dense star cluster. (Photo: Northwest visualization).

The process of binary evolution occurs when a pair of binary stars explode to create two black holes, which continue to revolve around each other as before. Initially, they orbited each other as double stars, and their rotations and tilts were thought to be also aligned.

Scientists also hypothesize that binary black holes originate from a galactic disk.

Meanwhile, the moving complex consists of two individual black holes. Each hole has its own tilt and rotation, but is combined by a rigorous astrophysical process, forming a double black hole system.

Currently, many people hypothesize that this pairing could occur in a dense environment like a globular cluster, where thousands of stars close together could squeeze two black holes together.

Uncertain of true origin

Research on 69 binary black holes, astronomers determined these giant objects can come from both globular clusters and galactic disks. However, researchers have not discovered the original rules for each specific case.

The LIGO laboratory (United States) worked with an Italian partner, Virgo, to determine the rotation period of the previous 69 binary black holes.

Such a model is set up to assume that only part of the binary black hole is created with aligned rotation periods, with the remainder having random rotation periods. Another model is configured to predict the rotation direction with moderate contrast.

Eventually, they discovered that the origin always changed depending on the fitted models. Therefore, for consistent results, more data from 69 binary black holes are needed.

According to Salvatore Vitale, associate professor of physics and member of the Kavli Institute for Astrophysics and Space Research, rotation period measurements are very inaccurate.

“But as we build more data, we can get better information. We can then confirm a story that we can believe.”he said.

Article source: Zing

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According to researchers, even if they can classify binary black holes, they still cannot determine the specific origin that created them, Science Alert reported….

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