Sunday, October 7, 2012

New X-ray discovered a new black hole

In mid-September, a space telescope, "Swift" has found a rare celestial phenomenon - a new X-ray, the appearance of which specify the presence of previously unknown black hole (BH) of stellar mass.

The facility is named Swift J1745-26 in accordance with its coordinates in the sky, and the new is a few degrees away from the center of our galaxy in the direction of the constellation Sagittarius. While astronomers to calculate the exact distance to the object, but they suggest that it is from us at a distance of 20,000 to 30,000 light-years away in the inner region of our Milky Way galaxy.

X-ray nova is a brief flash of X-rays observed in the sky for several days, after which it fades over several months. X-ray nova is different from the usual new that the central component in the first of these is not a white dwarf, a neutron star or a black hole. The mechanism of its occurrence is that the fall of the substance on the black hole is uneven, and in some regions of the accretion disk is an accumulation of the substance. Upon reaching a certain critical mass of matter - like water, which breaks the dam - is collapsing on the BH, and the system settles down to the next such event.

The tremendous energy of the observed flare, after reaching its peak of 18 September than 10,000 electron volts, and the long persistence allowed astronomers to identify it as a new X-ray at the center of a black hole.

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