Astronomers using the James Webb Space Telescope have possibly discovered what might be the oldest black hole in the universe, formed just after the Big Bang. Their findings could provide solid proof of primordial black holes, which have intrigued scientists for years. These black holes might have formed in the universe’s early moments, prior to the creation of stars and galaxies.
Roberto Maiolino, a cosmologist at the University of Cambridge, shared that this black hole is “nearly naked.” This challenges current theories because it seems to have formed without a surrounding galaxy, which is quite unusual. Traditional views hold that black holes arise from the collapse of massive stars; however, this new observation raises questions.
Andrew Pontzen from the University of Durham warns that while this is exciting, it’s not definitive evidence. They’ve detected this black hole around 700 million years after the universe formed, not right at the beginning. He emphasizes that the research points towards primordial origins, but they still need more evidence to confirm this theory.
Typically, black holes grow from the collapse of large stars, leading to the supermassive black holes we see at the centers of galaxies. However, astronomers have found ancient black holes that seem too large to fit this model. This has led to alternative theories, like black holes forming from very dense gas clouds influenced by dark matter.
Primordial black holes are especially noteworthy as they could only have formed right after the Big Bang, during a time when matter was unevenly distributed in the cosmos. These early black holes might also explain how some ancient black holes got so massive, potentially making them candidates for dark matter.
The black hole in question is linked to an object called QSO1, a “little red dot” that the James Webb Telescope detected. Experts are debating what QSO1 really is—some think it’s a compact galaxy; others believe it’s an active supermassive black hole consuming matter.
Using gravitational lensing, which is a phenomenon where the gravity of a nearby object magnifies the light from a distant one, astronomers could measure the rotation of material around QSO1. They estimate the black hole at its center is about 50 million times the mass of our Sun, strange when compared to the black holes we know locally, which are typically much smaller relative to their host galaxies.
Interestingly, the surroundings of this black hole mostly contain hydrogen and helium, the basic elements from the Big Bang. The lack of heavier elements suggests it exists in a relatively barren area, which further supports the idea of a black hole forming without a traditional galaxy.
Maiolino notes that they are “witnessing a massive black hole formed without much of a galaxy.” While this is not yet conclusive proof of primordial black holes, it provides significant food for thought.
Looking ahead, experts believe that future gravitational wave detectors could provide more insights. In a decade, these technologies may help to clarify the role of black holes in the universe’s evolution.
For more insights into black holes and their fascinating nature, you can read more here: The Guardian.