A group of astronomers found the most distant radio-emitting quasar ever discovered. It took 13 billion years for its light to reach our hands. Although there are still many problems, its discovery will help to better understand the early universe.
Earlier this year, the discovery of the farthest quasar (J0313-1806) was announced. The quasar is located about 13.03 billion light-years. Now, a closer radio jet has just been discovered, but its particularity is by far the most distant radio jet source known.The research results will be published in Astrophysical Journal.
The new quasar is called P172 + 18 And its light has been very slow 13 billion years Reach us so we saw when the universe has a few 780 million years“One of the most special is its powerful launch power in radio waves. This is the first time in the universe age to see them so clearly”, one of the main authors who explained this work to SINC, Eduardo Bañados, From the Max Planck Institute of Astronomy, Germany.
This Quasar Or quasar (short for “wireless power source for sight”, Front sight wireless power supply English) are very bright objects found in the centers of certain galaxies. They obtain energy from supermassive black holes. “There are many mysteries about the formation and evolution of these black holes: we know their existence, but we still don’t know how They formed so quickly in less than 700 million years after the Big Bang“Bañados said.
As the black hole consumes the surrounding gas, energy is released, making it easier to detect. In the case of P172 + 18, it is powered by a black hole whose mass is 300 million times larger than our sun and consumes a staggering amount of gas.
Only about 10% of quasars-the so-called “Radio strength‘-They have jet planes, and they glow brightly at radio frequencies. Their research can provide important information on how black holes in the early universe grew to super-large scales rapidly after the Big Bang.
Supermassive black hole-radio jet relationship
“To form this kind of radio jet, a very strong magnetic field must be generated near the supermassive black hole. However, an unsolved question is why not all these holes form a radio jet. Bañados explained that there may be other factors (closed Environment, age…) provides the necessary ingredients.
He continued: “There are many mysteries about the formation and evolution of these supermassive black holes.” Certain theories about their formation require the presence of jets, which help the black hole to swallow nearby matter, much faster than without a black hole . This is exactly what we see in this object: its black hole is enjoying a feast, and it is growing at one of the fastest rates observed in any black hole. “
If this is a common mechanism for the growth of these black holes, then more similar objects should be seen when observing the universe. “So far, this is the most distant jet quasar, but I think it’s just because we haven’t searched them in detail so far. I’m optimistic that we will find more things, especially if This is an important mechanism for the formation of these mysterious objects,” Bañados said.
He added: “The quasars we saw at the beginning of the universe were real monsters.” They were very large and lived in the largest galaxies at the time. It can be expected that quasars like P172 + 18 will form in the densest part of the original universe, and they will eventually become the center of the galaxy clusters we see in the universe today. Theoretical simulation supports this situation, but we are still trying to verify this through observation.
Looking for a needle in a haystack
Bañados emphasized: “Finding these objects is like finding a needle in a haystack, or more difficult.” Bañados emphasized that he discovered the P172+18 stage: “First, we use all databases to select it as a candidate for a radio front sight Radio waves, light waves and infrared rays. Then, we identify them as quasars and the most distant wireless power source. Magellan Telescope Las Campanas Observatory from Chile”.
To get more information about new quasars, astronomers and researchers Chiara Mazzucchelli European Southern Observatory (ESO) and other collaborators Very Large Array (United States), confirmed the characteristics of the radio, “This shows some surprises, such as its luminosity has changed twice, and there is a wireless power source very close to a quasar, which did not appear in the data 20 years ago.”
In order to measure the properties of black holes (for example, the mass and growth rate of black holes), the author obtained Nordic Optical Telescope Located in the Canary Islands, and Large binoculars In Arizona, USA and near infrared Extra large telescope (VLT, ESO), one of which is telescopios Keck In Hawaii.
Eduardo Bañados, Chiara Mazzucchelli, etc. “A highly accreted radio quasar was discovered at z = 6.82.” Astrophysical Journal, 2021.