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Scientists finally solve thirty-year-old black hole mystery
- Gravitational wave astronomy has enabled scientists to study the universe through ripples in spacetime, aiding in understanding black holes.
- Black holes can be described by mass and spin according to Kerr spacetime predictions.
- The ringdown process of merged black holes emits gravitational waves through quasinormal modes (QNMs).
- A 30-year-old mystery in QNM behavior was resolved by Associate Professor Hayato Motohashi.
- Resonant excitation, linked to avoided crossings near exceptional points, causes significant changes in QNMs.
- This phenomenon affects multiple pairs of QNMs, particularly in high-spin black holes.
- Unexpected shifts and amplifications in QNM frequencies and excitation factors were observed.
- The resonant behavior is not exclusive to black hole phenomena but is a universal feature in various fields of physics.
- By studying these resonances, scientists aim to improve black hole spectroscopy and test general relativity more accurately.
- Motohashi's findings suggest that gravitational wave signals hold more information than previously thought, paving the way for new discoveries in non-Hermitian gravitational physics.
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