Write a comment
Astronomers using the National Science Foundation's Karl G. Jansky Very Large Array (VLA) and Very Long Baseline Array (VLBA) have found and studied the most distant cosmic jet discovered so far - a jet of material propelled to nearly the speed of light by the supermassive black hole in a quasar some 13 billion light-years from Earth. The quasar is seen as it was when the universe was only 780 m Astronomers using the National Science Foundation's Karl G. Jansky Very Large Array (VLA) and Very Long Baseline Array (VLBA) have found and studied the most distant cosmic jet discovered so far - a jet of material propelled to nearly the speed of light by the supermassive black hole in a quasar some 13 billion light-years from Earth. The quasar is seen as it was when the universe was only 780 million years old, and is providing scientists with valuable information about how galaxies evolved and supermassive black holes grew when the universe was that young.
The studies indicate that the quasar - a galaxy harboring a black hole 300 million times more massive than the Sun - has a jet of fast-moving particles only about 1,000 years old. While other quasars have been found at its distance and beyond, it is the first found at such a distance with the strong radio emission indicating an active jet. Only a small fraction of quasars have such jets.
"The black holes at the cores of many of these very distant quasars are so massive that they challenge our understanding of how they could have grown in the relatively short time available to them that early in the universe's history. One possibility is that jets provided a mechanism that allowed the black holes to grow more quickly. Finding a jet in a quasar at this epoch is an exciting clue about this question," said Emmanuel Momjian, of the National Radio Astronomy Observatory (NRAO).
"Jets have a role in regulating star formation and the growth of their host galaxies, so this discovery is valuable to understanding these processes in the early universe," said Chris Carilli, also of NRAO. "The jets at that time also propelled atoms and magnetic fields into what had been pristine space between the galaxies," he added.
Finding a quasar with bright radio emission at such a distance also can help astronomers learn more about closer objects.
"Distant radio-emitting quasars at the beginning of the evolution of the cosmos also serve as beacons to study material that lies between Earth and the quasars," said Eduardo Banados of the Max Planck Institute for Astronomy in Germany.
As radio waves pass through gas en route to Earth the gas will absorb specific wavelengths in patterns that reveal its composition.
The object, called P172+18, originally was identified as a quasar candidate in 2015 in data from the Pan-STARRS sky survey using a visible-light telescope in Hawaii. The astronomers then noted that NRAO's FIRST survey, done with the VLA, showed a radio-emitting object at the same position. They later made infrared observations that yielded the distance to the object and the mass of the black hole.
Research Report: "The discovery of a highly accreting, radio-loud quasar at z=6.82"
Related Links
National Radio Astronomy Observatory
Understanding Time and Space
|
| Tweet |
| Thanks for being there;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain. With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords. Our news coverage takes time and effort to publish 365 days a year. If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution. | ||
| SpaceDaily Monthly Supporter
$5+ Billed Monthly |  | SpaceDaily Contributor
$5 Billed Once credit card or paypal |
Will this solve the mystery of the expansion of the universe
Odense, Denmark (SPX) Mar 04, 2021
The universe was created by a giant bang; the Big Bang 13.8 billion years ago, and then it started to expand. The expansion is ongoing: it is still being stretched out in all directions like a balloon being inflated. Physicists agree on this much, but something is wrong. Measuring the expansion rate of the universe in different ways leads to different results. So, is something wrong with the methods of measurement? Or is something going on in the universe that physicists have not yet discove ... read more