Scientists using the James Webb Space Telescope (JWST) have made an exciting discovery. They found the earliest black hole ever detected, dating back more than 13 billion years, just 500 million years after the Big Bang. This discovery, detailed in the Astrophysical Journal Letters, gives us a glimpse into the universe’s early days.
The black hole and its host galaxy, known as CAPERS-LRD-z9, offer clues about the state of the universe at that time. Anthony Taylor, an astronomer at the University of Texas, Austin, said, “When looking for black holes, this might be as far back as we can go.” Their study pushes the limits of what current technology can detect.
CAPERS-LRD-z9 is classified as a “Little Red Dot,” named for its small size in comparison to other galaxies and its red light emissions. Despite its brightness, its early formation poses intriguing questions since it suggests the presence of many stars when cosmological theories say that was unlikely.
Steven Finkelstein, another astronomer from UT Austin, expressed surprise at these “Little Red Dots.” They look nothing like the galaxies we’ve seen through the Hubble Space Telescope. “Now, we’re working to understand what they are and how they formed,” he noted.
To explore CAPERS-LRD-z9 further, researchers examined it with the JWST. They detected a unique pattern of light wavelengths produced by fast-moving gas spiraling into the black hole. While there are a few other potential black holes farther away, this distinctive pattern confirms CAPERS-LRD-z9 as the earliest black hole identified to date. It’s likely that other Little Red Dots may also harbor similar black holes at their cores.
What’s remarkable is that the black hole at the center of CAPERS-LRD-z9 is about 38 million times more massive than our sun. That’s roughly ten times the mass of Sagittarius A*, the supermassive black hole at our Milky Way’s center. Surprisingly, this black hole accounts for about 5% of all stars in its galaxy, a much larger figure than what we see in more contemporary galaxies.
Finkelstein remarked, “This adds to the evidence that early black holes grew much quicker than we previously thought,” suggesting they either started out bigger than models predict or they grew at an unprecedented pace.
Furthermore, the surrounding gas cloud may explain why these Little Red Dots appear red. The gas might shift the light emitted from the black hole into longer, redder wavelengths.
As research continues on CAPERS-LRD-z9, scientists hope to uncover even more secrets about black holes and the formation of galaxies in the early universe. Taylor added, “This is a good test object for us. We haven’t had the chance to study early black hole evolution until now.”
These findings enhance our understanding of cosmic history and open new avenues for future exploration. The universe still holds many mysteries, and each discovery like CAPERS-LRD-z9 brings us one step closer to unlocking them.
For more on the impactful discoveries made by the JWST, visit NASA.