The strange flickering problem got a breakthrough thanks to the Liverpool Gravitational Wave Optical Transient Observer. They spotted an object labeled SN 2024afav on December 12, 2024. At first, it appeared to be a typical superluminous supernova. It was bright and showed light curve patterns similar to other known supernovae. But as astronomers monitored it further, they noticed something unusual: it began to chirp.
In physics, a chirp means a signal whose frequency rises over time. For SN 2024afav, its emissions fluctuated, but the intervals between these fluctuations were decreasing. After observing two more bumps, Farah and his team were able to predict how the gap between bumps would change. They adjusted their observation schedule and pointed their instruments toward the supernova. Sure enough, the fourth bump appeared right on cue. The fifth bump helped them refine their calculations, revealing a reduction of about 29 percent in the gap.
This accurate prediction was a significant challenge to our existing models about magnetars—highly magnetic neutron stars. Scientists had previously believed irregular bumps in emissions could come from supernova debris interacting with surrounding gas. However, the precise, rhythmic nature of SN 2024afav’s emissions suggested something more complex at work.
“We devised a new model to explain this behavior,” Farah said. Their approach incorporated the Lense-Thirring effect, also known as frame-dragging. This concept from General Relativity suggests that a massive, rotating object can drag the surrounding spacetime with it. “We hadn’t tested this before because it was uncharted territory for magnetars,” Farah explained. When they did, the predictions aligned perfectly with the observations.
This discovery can reshape our understanding of extreme astrophysical phenomena. It highlights the importance of continued observation and innovation in science. As we learn more about the universe, models need to adapt, reflecting the complexities of celestial mechanics. Advances in telescope technology will likely lead to even more fascinating findings in the future.
