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The black hole at the center of the Milky Way is slowly spinning, but what does that mean?

It turns out that the black hole at the center of the Milky Way hardly rotates. The new finding will be confirmed by the "Event Horizon" telescope when the data is revealed. Now researchers are trying to understand how the spin of supermassive black holes affects the formation of stars in galaxies?

A wide view of the center of the Milky Way. Credit: ESO and Digitized Sky Survey 2. Acknowledgment: Davide De Martin and S. Guisard (www.eso.org/~sguisard)

The monstrous black hole at the center of the Milky Way, in the galaxy we inhabit, never stops making headlines. The massive object that just recently won three physicists the Nobel Prize reveals in the research of scientists from Harvard a different picture than what was thought until now. In the article they published in the prestigious journal The Astrophysical Journal Letters It was revealed that the black hole is almost non-rotating, thus sharpening the hypothesis that it does not launch a jet of particles from its surroundings.

Supermassive black holes, such as SgrA*, the monstrous black hole at the center of our galaxy, are characterized by two numbers: mass and spin (the degree of rotation of the black hole around itself). But despite the "simple" description, massive black holes play a significant role in the formation of galaxies. According to the article by Dr. Avi Leib and Prof. Frank Baird from Harvard "Black holes release a huge amount of energy that blows gas out of the galaxies and thus has a great effect on the formation of stars in the galaxy".

While the scientific community is aware of the large effect of the black hole's mass, it is not clear how much the black hole's spin affects, especially because it is a difficult figure to measure. As Dr. Leib explains "the effect of rotating black holes on the holiday stars around them is negligible and therefore it is difficult to measure its spin".

An illustration showing the orbit of the stars around the center of the Milky Way. Credit: ESO/L. Calçada/spaceengine.org

To understand in depth the influence of SgrA* on the formation of stars in the Milky Way galaxy, Dr. Leib and Giamko Peregion (another author of the article from Northwestern University) examined the orbit of the stars closest to the black hole and their spatial distribution in relation to it. The nearest stars can move up to a few percent of the speed of light. The movement of the stars allowed the scientists to determine an upper threshold for the spin of the black hole, "we were able to show that the massive black hole at the center of the galaxy rotates slowly" claims Fargion. "The interesting conclusion will affect the future detectors that will be sent into space and those that are supposed to observe the center of the galaxy, such as the 'Event Horizon Telescope'" that photographed the black hole in the galaxy M87*.

The "event horizon" telescope may shed more light on the phenomenon

According to the latest observations, it turns out that the stars closest to the black hole move on two fixed planes. The researchers showed that if the black hole had a sufficiently large spin, the orbit of the stars would not be defined on only two planes. Leib explains that "our research showed that the spin of SgrA* must be 10 percent smaller than its maximum theoretical size defined by a black hole rotating at the speed of light, otherwise the planes that define the motion of the stars would not be as we observed." The study raised another interesting point about the black hole at the center of the galaxy, it does not emit a jet. "Jets are driven by spinning black holes," Leib explained. Peregion adds that "there is indeed no evidence that SgrA* emits a jet, but the "Event Horizon" telescope may shed more light on the phenomenon." The findings were published a few days before the announcement of the Nobel Prize awarded to Ganzel and Getz for the discovery of the massive object at the center of the galaxy. It is interesting to note that the prize was awarded for "discovery of a compact and massive object" and not for a "black hole".

Black holes are a scientific enigma and have always raised more question marks than exclamation marks. The question of how the spin of supermassive black holes affects star formation still exists, but it is not certain that we will see an answer soon because it is very difficult to make measurements.

For further reading, a scientific article is attached

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9 תגובות

  1. Apparently we are still missing some components in the equation. Maybe components that have nothing to do with the comparison at all.

  2. A black hole in my opinion is stronger than the speed of light to such an extent that it attracts everything to it and decomposes it into elements and the question why is it black because in my opinion every ray of light that enters it is stretched like spaghetti until it is decomposed into elements to the extent that it is unable to create light again

  3. Mass cannot rotate at the speed of light because then the energy that rotates the body will simply start turning into mass instead of rotating faster. Just like a nuclear bomb, only in a bomb the mass is turned into energy and at the speed of light (or rather close to the speed of light) it's the other way around and energy becomes mass. So in short, if he were to move at the speed of light or approach it, all that would happen is that his mass would increase

  4. What is expected of the state of black holes in the universe in the distant future of many billions of years?

  5. It seems to me, as if the nucleus/core of the massive black hole is the product of the collapse of a star to the level of matter and antimatter.
    That is, for the sake of an example, let's assume that one atom/particle ionizes with its antimatter up to an infinite number of times, since the antimatter doesn't even have anywhere to escape.
    Or something like that ..
    ?

  6. It's quite frustrating to find out that the black hole is the hill in the space scientists. Still the hole remains an enigma.
    I didn't understand, is it possible that a body with mass can move at the speed of light?

  7. We are getting closer to the black hole all the time. Turn it around and aim for it. This is the cycle of the universe of each galaxy. God is the black hole. Dead people and dead stars and dead galaxies. Go look for meaning……

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