a Trace from the explosion that occurred 3.5 million years ago.
Not long ago, scientists believed that the black hole in the center for space standards is a very calm. However, in a new study to be published soon in the Astrophysical Journal, talking about Titanic the expanding beam of energy that broke from 3.5 million years ago, sending a cone-shaped burst of radiation through the poles of the galaxy and into deep space. Experts believe that the mysterious bubbles Fermi — the major structures, which are located above and below the center of the galaxy, and there are traces of this ancient blast.
As you know, the milky Way — spiral. However, about 1% of all observed spiral galaxies, astronomers have a very active nucleus of a fairly large mass. From time to time is the core with great speed flushed a large amount of gas. Such emissions is accompanied by an abrupt increase in brightness of the black hole and are called Seyfert flares, and galaxies, in turn, Seyfert galaxies.
So look mysterious bubbles Fermi
In the latest research, Australian and American scientists under the guidance of Professor articles of bland-hawthorn of the University of Sydney found that 3.5 million years ago, the flash was so powerful that it influenced the Magellanic Stream — long gas trail, which stretches from the nearby dwarf galaxies called the Large and Small Magellanic Clouds. The Magellanic Stream is at a distance of 200 000 light-years from the milky way.
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According to experts, the explosion was too strong to provoke anything other than a nuclear-related activities in the center of the milky Way, known as Sagittarius A*. Recall that the mass of Sagittarius A* at 4.2 million times the mass of the Sun. The insights obtained also thanks to data obtained by the Hubble space telescope.
A Powerful explosion of energy and radiation came directly from the center of the galaxy into the surrounding space. This shows that the center of the milky way — a much more dynamic place than scientists previously believed. Moreover, by galactic standards, the explosion occurred recently. Indeed — 3.5 million years ago, our planet Australopithecines vengeance travelled around Africa.
artist's Impression of the massive bursts of ionizing radiation that escapes from the center of the milky Way and affect the Magellanic Stream. Author: James Josephides / ASTRO 3D
The Preprint studies available on the . The results, according to experts changing our view of the milky Way. In the past, astronomers thought our galaxy is inactive with not a very bright center. Now, the results opened up the possibility of rethinking its evolution and nature.
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Another important part of the study is the fact that scientists still have much to learn about the black hole in the center of the milky Way. After all, how black holes evolve and influence the galaxy and interact with them, is an outstanding problem in modern astrophysics.
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