New Quasar Discoveries
A global team of researchers has identified 31 quasars that emerged during the universe’s earliest stages. The most distant of these objects are situated more than 13 billion light-years from Earth, meaning astronomers see them as they appeared roughly 670 million years after the Big Bang. These findings have been published in the journal Astronomy & Astrophysics.
Quasars rank among the brightest objects in the cosmos, releasing immense amounts of energy as matter falls into a supermassive black hole. Several of the newly detected black holes boast masses billions of times greater than that of the Sun. Detecting such quasars is challenging: they are extremely rare, their light shifts into the infrared spectrum, and they can easily be mistaken for ordinary stars. Of the 31 quasars discovered, 14 have a redshift exceeding 7. Two of the oldest among them now set a new record for the most distant quasars ever observed.
Studying the Quasars
The second-oldest quasar resides in a gas- and dust-rich galaxy where new stars are actively forming. Scientists plan to measure the black holes’ masses, analyze the surrounding gas composition, and gain deeper insight into how the young universe evolved during its first billion years. As Joseph Hennawi stated:
“This discovery will help us better understand how supermassive black holes could grow so large in such a short time after the universe began.” - Joseph Hennawi
The next phase of research will involve studying these objects using the James Webb Space Telescope and the ALMA radio observatory. Researchers hope these new data will unlock further secrets surrounding these ancient cosmic formations.
Beyond expanding our knowledge of the early universe, the discovery of these quasars raises fundamental questions about galaxy formation and evolution. Investigating these objects may help astronomers uncover the mechanisms by which supermassive black holes emerged and grew during this early period of cosmic history. In turn, that will provide a clearer picture of what the universe looked like in its youth and which processes dominated at that time.
In addition to the recent discoveries, the ESA telescope has recently doubled the known number of ancient quasars, further enhancing our understanding of these enigmatic cosmic entities. This advancement not only complements the findings from the Euclid Telescope but also opens new avenues for exploring the formation and evolution of supermassive black holes in the early universe.