As explained by another author of the research, an astronomer at the University
of Michigan, Marta Volonteri, "We had reason to expect that black holes
exist in many of the early galaxies, but so far they had escaped our
search." In fact, it was anticipated that a population of black holes "baby"
existed in the early universe, but this population had not been observed so
far.
The main difficulty in studying black holes is that they are almost all
surrounded by dense clouds of gas and dust, so that optical telescopes can’t
detect them. However, the X-ray light high energy it can penetrate these
clouds, and allow to study what they hide.
Artist's impression
of a supermassive black hole sucking matter from a nearby star of a
supermassive black hole course devouring a star. The detailed calculations by Volonteri and colleagues from
these observations showed that the total amount of growth of these black holes
was a hundred times greater than previously estimated.
According to Ezequiel Treister says, an astronomer at the University of Hawaii
and director of the study: "So far, we had no idea what had black holes in
early galaxies. We never knew if they had existed in them. Now, we know each
other, and who grew up in extreme. "
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