Physicists have been monitoring gravitational waves since 2015, but now they may be able to hear a hidden melody within these cosmic ripples. A new study using data from the clearest black hole merger ever observed has provided evidence for “direct waves,” which are believed to originate much closer to a black hole’s event horizon than previously thought.
Direct waves are distinct from existing gravitational wave signals, known as quasinormal modes, which are produced after two black holes merge. The new study suggests that direct waves could offer insights into the most extreme environments in the universe, such as those near black hole event horizons. However, scientists face challenges in observing and verifying these signals due to intense gravitational environments.
Researchers are excited about this discovery, considering it a breakthrough for understanding black holes. They believe that further examination of the signal and signs of direct waves hidden beneath quasinormal modes will lead to more confident conclusions.
Source: https://www.scientificamerican.com/article/what-happens-at-the-edge-of-a-black-hole-astronomers-may-be-close-to-finding-out