Astronomers have found evidence of a large number of double supermassive black holes, the likely precursors of gigantic black hole merging events.
This confirms the current understanding of cosmological evolution – that galaxies and their associated black holes merge over time, forming ever larger galaxies and black holes, said an international team of scientists, led by astronomers from the University of Hertfordshire in the UK.
For the research published in the Monthly Notices journal of the Royal Astronomical Society, the team studied radio cards of powerful beam sources and found signs that would normally be present when looking at black holes that are tightly orbiting. 1
Astronomers studied the direction in which these jets are emitted and deviations in these directions. They compared the direction of the jets with that of the radio lobes (which store all the particles that have ever passed through the jet channels) to show that this method can be used to indicate the presence of supermassive binary black holes.
We've studied the jets for a long time using computer simulations under a variety of conditions: In this first systematic comparison with high-resolution radio cards from the most powerful radio sources, we were amazed that the sources were found in three quarters of Jet Precession signatures, "said lead author Martin Krause Lecturer at the University.
The fact that the strongest jets are associated with binary black holes could have important implications for star formation in galaxies: stars are formed by cold gas, rays heat that gas and suppress star formation. 19659002] A jet that always travels in the same direction heats only a limited amount of gas in its vicinity, but jets of binary black holes continually change direction.
Therefore, they can heat up much more gas, making the formation of stars much more important is suppressed more efficiently and thus contributed is that the number of stars in galaxies remains within the observed limits, said the astronomers.
rt / mag / mr
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