EU: a black hole in the center of the Milky Way recently been very active




Recent observations made by the European Space gamma-ray telescope Integral, showed that a massive black hole, which is located in the center of our Milky Way galaxy, most recently has been much more active. Only 350 years ago, she threw into the environment is a million times more energy than it is now. Scientists believe that the current "lull" of our black hole may soon be over, and it will again become active.

These studies were conducted international team of scientists, led by Michael Revnivtsev, an employee of the Moscow Institute for Space Studies and the Institute of Astrophysics. Max Planck (Germany).

The illustration here photo taken gamma-ray telescope Integral, shows the central region of our galaxy. The central supermassive black hole whose mass is more than a million times the mass of our sun is a powerful source of radio emission Sgr A *, and Sgr B2 — this molecular cloud. They are named after the southern constellation of Sagittarius (Sagittarius). It is in the direction of the constellation, and is the center of our galaxy.

The distance between the source Sgr A * and Sgr B2 is about 350 light-years. So, now the cloud Sgr B2 is irradiated with gamma radiation emitted by the source Sgr A * 350 years ago, when the black hole is in an active state. Commercially available molecular cloud Sgr B2 is hydrogen absorbs gamma rays and emits it in the X-ray wavelengths. In the right part of the image seen other bright objects, but they are not relevant to the central black hole.

Gamma rays in the center of the galaxy is a direct consequence of the past activity of the black hole. During this period, gas and matter captured by the gravitational field of a black hole, before hiding behind "event horizon" compressed and heated to such temperatures that began to emit X-ray and gamma-ray wavelengths. These events and "enrolled" in a cloud of molecular hydrogen Sgr B2, situated at a distance of 350 light-years from the black hole.

Studies have also shown that this active state of the black hole lasted at least 10 years of age. In addition, scientists believe that the source of Sgr A * in the foreseeable future can once again add to the brightness, that is, our black hole can be activated again.

Add that the space telescope can observe objects Integral not only the gamma-ray wavelengths, but also X-ray and visible light. This telescope was launched into Earth orbit Russian rocket "Proton" in October 2002

Battery News, 01/02/2005 17:37
Source: ROL

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