Saturday , July 2 2022

Characteristic "shaking" of the glitter near the center of the Milky Way: confirm the existence of black holes – Scientific Discovery – cnBeta.COM


Astronomers have discovered that there is a "hotspot" around the jet of a large black hole and exhibits the characteristic "radiation" of infrared radiation that provides a super-mass black hole in the center of the galaxy. New evidence. Avery Broderick, an astronomer from the University of Waterloo in Canada, who was involved in the construction of a model of the central black hole of the Milky Way years ago, said that observations at the end of 13 years were finally paid.

This new work includes the work of Brodrick years ago. The study showed that the black hole in the center of the Milky Way, known as the Spring A *, emitted three flares (also known as visible hot spots). The team detected an unstable explosion from these markers to detect the agglomeration disc around the black hole. The masonry disk is a disk-like structure formed by a force of gravity falling into a central celestial body of a black hole or a neutron star. Scientists through flame flares mapped the common A * behavior.

Broderick's black hole theory is based on the research of two earlier teams on the near infrared work of the Milky Way center. The two teams are the astronomer Reinhard Genzel from the Max Planck Institute of Physics in Germany and Andrea Ghez from the University of California at Los Angeles. And Mark Morris reveals that the center of the Milky Way is unstable, but will be extremely bright for a period of 30-40 minutes.

Astronomers believe that, if not all, of the large galaxies are super-mass black holes in the center. In 2005, when Brodrick worked with the astronomer Avi Loeb at the Harvard-Smithsonian Center of Astrophysics, he proposed a periodic flare at the center of the galaxy. Known as a bright infrared glare – from a super large object like a black hole.

This theory is further supported by new evidence. Astronomers have discovered a very bright, intense cluster of stars (they call the central part of the galaxy in its orbit "nuclear clusters"). In addition, infrared observations show that the stars in the center of the Milky Way surround an object approximately 4 million times the mass of the Sun, and once again show the presence of a large black hole. But Broderick said that before the new work, all observations were not enough to prove that there were black holes in the center of the Milky Way.

Sudden exacerbation behavior

The three marks from the center of the recently discovered Milky Way, Broderick said, were the products of black hole gravity lenses. Or The black hole acts like a flashlight lens. There is a local spray area, but not the flare of the spray field itself, it causes glare, Yerel he said. Conversely, the gravity pull of the black hole bends the light generated by the jet and enlarges it so that we can observe it. Broderick explained: "This is the reason for the glare, the increase of excessive gravity."

Based on this result, Broderick and Lieber initially predicted that in the agglomeration disk around the Sagittarius A *, objects would exhibit sloshing of the specific infra-red jet as it roam the orbit of the black hole. They detailed this theory in a 2005 article and added it to a follow-up document in 2006. However, the technology at that time did not detect such a release.

In 2016, the European Southern Observatory Very Large Telescope (VLT) 's high – precision optical interferometer GRAVITY was introduced, replacing them all. The accuracy and precision of the GRAVITY helped astronomers identify the explosion of three glare jets on the growth disk of the Common A *. The new findings of the research team of the European Southern Observatory were published in the October 18th issue of the journal Astronomy and Astrophysics.

Broderick said, un Although the discovery of the flares has existed for a long time, the main finding here is the characteristic wobbling of these flares.

The arc close to the arc occurs during the process of breaking and reattaching the magnetic field lines near the black hole. This process, called "magnetic reconnection", releases a large amount of energy and charged particles leading to very bright events. Infrared radiation emitted from these signals shows sloshing characteristic due to orbital motion around the black hole. Specifically, when other jets are incorporated into the agglomeration flow around the center of the Milky Way, the center of the infrared radiation moves or "shakes".

Outside the event horizon of the black hole, the substance such as gas and dust moves in a circular orbit at about one third the speed of light. The orbital period of the glow – the time required to complete one round of the orbit – is the same as the time interval between slushing and astronomers observe every 40 to 50 minutes. Broderick stated that such a short time scale was a result of black hole drilling and that these bypass materials were very close to the black hole.

Ick Thirteen years ago, our view was that these flares are linked to structural variability (in the center of the galaxy) and that we can use this structural variability to take into account the general relativity and powerful attraction, yıl says Broderick. Excitement, this opinion is correct. "

Prove the presence of black hole

The jet coming out of the flash point is not the only proof that a super-mass black hole is present in the center of the galaxy. The Milky Way Center undoubtedly has an object that is 4 million times the mass of the Sun, but the process of proving it as a black hole is difficult.

There is also a nuclear cluster with more than 500,000 stars in the center of the Milky Way. According to Einstein's general theory of relativity, astronomers estimate the quality of the hidden celestial bodies in the center of the Milky Way by measuring the quality of the stars and the gases that surround them. Broderick said it supports the super mass black holes of 4 million solar mass objects.

"As far as we know, no other object can maintain this quality without collapsing in such a compact structure." Said. If it isn't the black hole, then it must be something very strange beyond our current. Cognitive boundaries of things. "

In addition, observations indicate that many substances are lost in the center of our galaxy. These substances are dragged into the center of the galaxy and eventually they are trapped in the growing agglomeration disk around the black hole. Although most of the material on the stacked disc path is secured around the spring A *, the black hole is drawn continuously through and through the event horizon very close to the material. The event horizon is the outer boundary of the black hole and a space-time limit. When a matter falls into the black hole in the event horizon, it can no longer escape. Broderick said the researchers could see that the substances were extremely bright due to friction as they passed the event horizon.

Kon Where does this go? ”Was a topic of discussion. "Brodrick," We know that these substances fall into the black hole, because we see this increasing in brightness, but we don't see the corresponding effect. Glow, so in some places it definitely disappears.

Therefore, the presence of the event horizon and the black hole behind it became the most plausible explanation for the specific behavior of the center of the Milky Way. . From a personal point of view, it's really exciting to see a final confirmed estimate. Olarak, I think science history is a very important memory. Black holes are a kind of joke. Something has a real foundation. "

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