MIT astronomers have made a groundbreaking discovery, uncovering the oldest flickering quasar ever observed. This remarkable find not only pushes the boundaries of our understanding of the early universe but also challenges existing theories about the formation and evolution of supermassive black holes. The quasar, detected just 850 million years after the Big Bang, is a testament to the universe's rapid growth and the intricate interplay between black holes and their host galaxies.
What makes this discovery truly fascinating is the quasar's accretion disk, a whirpool of high-temperature gas and dust surrounding the supermassive black hole at its center. Contrary to expectations, the disk is surprisingly flat and pancake-shaped, even at such an early stage in the universe's history. This finding raises intriguing questions about the maturity of black holes in the early universe and the processes that drive their growth.
The quasar's flicker, a natural phenomenon caused by fluctuations in the gas feeding the black hole, has allowed scientists to map the accretion disk's shape and structure. This flicker, stretched out over billions of light-years due to the expanding universe, provides a unique window into the past, revealing the disk's surprising flatness. The disk's shape, typically associated with more mature and stable black holes, challenges the assumption that black holes in the early universe should be more chaotic and unsettled.
This discovery has significant implications for our understanding of galaxy formation and evolution. Supermassive black holes, billions of times more massive than the sun, are the central 'engines' of most galaxies, regulating star formation and growth. The presence of a flat accretion disk in the early universe suggests that these black holes may have undergone rapid growth phases earlier than expected, shaping the galaxies around them in ways we are only beginning to understand.
The research, led by MIT's Gene Leung and Anna-Christina Eilers, utilized data from NASA's NEOWISE mission, a space-based infrared telescope. By re-processing archival data, the team unearthed a signal from the cosmic dawn, confirming the existence of the earliest flickering quasar. The quasar is estimated to be as bright as 12 trillion suns, with a flicker of about 20 percent, providing valuable insights into the structure and behavior of supermassive black holes in the early universe.
This discovery not only adds to our knowledge of the early universe but also opens up new avenues for research. By peering even further back in cosmic time, scientists can start to piece together the conditions that led to the formation of the first supermassive black holes. The mystery of how these black holes can grow and mature in such a short amount of cosmic time remains, but this discovery provides a crucial piece of the puzzle, offering a glimpse into the universe's rapid evolution and the intricate dance between black holes and their host galaxies.
