Four super-massive black holes, which are located more than a billion light years from the earth, have been found.
These super-massive black holes observed by an international team of scientists at the center of galaxies will provide new information on how the central black hole system operates, journal Astronomy and Astrophysics reported.
The scientists used world's two largest optical/infrared telescopes -- Keck -- on top of Mauna Kea in Hawaii to find these black holes or dying stars which are called active galactic.
"Astronomers have been trying to see directly what exactly is going on in the vicinity of these accreting super-massive black holes," said co-author Robert Antonucci, a UC Santa Barbara astrophysicist.
He explained that the nuclei of many galaxies show intense radiation from X-ray to optical, infrared, and radio, where the nucleus may exhibit a strong jet -- a linear feature carrying particles and magnetic energy out from a central super-massive black hole.
For the first time, the team observed a quasar with an active galactic nucleus, as part of the group of four black holes located more than a billion light years from the earth.
The team also used the United Kingdom Infrared Telescope (UKIRT) to follow up the Keck observations, to obtain current near-infrared images of the target galaxies.
