Saturday, June 9, 2012

Are Rogue Black Holes Wandering the Universe?

Are Rogue Black Holes Wandering the Universe?:

A composite image of galaxy CID-4 shows evidence the black hole is being ejected. Credit: X-ray: NASA/CXC/SAO/F.Civano et al; Optical: NASA/STScI; Optical (wide field): CFHT, NASA/STScI
Talk about a tough neighborhood! Even black holes aren’t welcome in galaxy CID-42, located about 4 billion light-years away from Earth. Astronomers using the Chandra X-Ray Observatory have found strong evidence that a massive black hole is being ejected from this galaxy, moving out at a speed of several million kilometers per hour. This phenomenon, known as a recoiled black hole, happens due to a gravitational wave “kick” from the merger of two black holes.
While this event is likely to be rare, it could mean that there could be giant black holes roaming undetected out in the vast spaces between galaxies.


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