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Blobrana


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Oldest black holes
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Yale astronomers detect black holes from the birth of the universe

The oldest black holes that were around at the birth of the universe have been found.
They're the earliest ever to have been detected. Astronomers from Yale University used the world's most powerful telescopes.

Priya Natarajan, a Yale cosmologist, told BBC Radio 5 live: "They swallow up everything that's right around their vicinity, and grow by swallowing."

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Blobrana


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RE: Distant Black Holes
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Chandra Deep Field South :
NASA's Chandra Finds Massive Black Holes Common in Early Universe

cdfs_circ_420.jpg

Credit      X-ray: NASA/CXC/U.Hawaii/E.Treister et al; Infrared: NASA/STScI/UC Santa Cruz/G.Illingworth et al; Optical: NASA/STScI/S.Beckwith et al

This composite image from NASA's Chandra X-ray Observatory and Hubble Space Telescope (HST) combines the deepest X-ray, optical and infrared views of the sky. Using these images, astronomers have obtained the first direct evidence that black holes are common in the early Universe and shown that very young black holes grew more aggressively than previously thought.
Astronomers obtained what is known as the Chandra Deep Field South (CDFS) by pointing the telescope at the same patch of sky for over six weeks of time. The composite image shows a small section of the CDFS, where the Chandra sources are blue, the optical HST data are shown in green and blue, and the infrared data from Hubble are in red and green.
The new Chandra data allowed astronomers to search for black holes in 200 distant galaxies, from when the Universe was between about 800 million and 950 million years old. These distant galaxies were detected using the HST data and the positions of a subset of them are marked with the yellow circles.

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Blobrana


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Astronomers Discover Giant Black Holes at Edge of Universe

Astronomers have been peering farther and farther into space, and back in time, using the worlds most powerful telescopes to detect galaxies billions of light years away that existed when the universe was just a fraction of its current age. But detecting the giant black holes thought to lurk at the centers of those galaxies has proven much more difficult.
Now a team of astronomers has discovered the earliest black holes ever detected, despite the fact that they are hidden from view by their host galaxies. They also measured the average growth rate of the black holes and discovered that they grow and evolve in tandem with their galaxies - something that astronomers had observed locally but which they knew little about when it came to the early, distant universe.
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