NASA on 31 / 8 that, using the Chandra X-ray Observatory, the astronomers discovered the pair of super-massive black hole first in spiral galaxies like our Milky Way.
Earth about 160 million light years, this is the closest pair of black holes ever known. The black hole near the center of the spiral galaxy called NGC 3393.
The two black holes are separated by only 490 light years and more likely they are the remains of a merger between two galaxies of unequal ago or more than 1 billion a year.
Both super-massive black hole is obscured by dust and gas, making them difficult to be observed in optical light. But for the more powerful X-rays, they can penetrate the obscuring material can cause this. The Chandra X-ray spectroscopy has significant symbol of a pair of supermassive black holes.
"If the galaxy is not located too close, we had no opportunity to observe two black holes in isolation as it did," said Pepi Fabbiano the Center for Astrophysics Harvard-Smithsonian possible, the led the study published in the online edition of the journal Nature.
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Pepi Fabbiano He added: "Because this galaxy is located in front of us, making us think that we have overlooked many such pairs of black holes."
The previously observed by X-ray wavelengths and the other showed a super-massive black hole exists at the center of the galaxy NGC 3393. However, the long with Chandra observatory allows researchers to detect and separate pairs of black holes.
When two spirals of equal size merge, the astronomers say it will lead to the formation of a pair of black holes and galaxies to form a broken and violent star formation .
Furthermore a galaxy containing a black hole pairs will have unusual properties.
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