The sound of the event horizon

@article{76282,
   author = {Konoplya, Roman},
   article_number = {14},
   doi = {http://dx.doi.org/10.1142/S0218271823420142},
   keywords = {Black hole;quasinormal mode;gravitational wave},
   language = {eng},
   issn = {0218-2718},
   journal = {International Journal of Modern Physics D},
   title = {The sound of the event horizon},
   url = {https://www.worldscientific.com/doi/10.1142/S0218271823420142},
   volume = {32},
   year = {2023}
}

TY  - JOUR
ID  - 76282
AU  - Konoplya, Roman
PY  - 2023
TI  - The sound of the event horizon
JF  - International Journal of Modern Physics D
VL  - 32
IS  - 14
SP  - "2342014-1"-"2342014-5"
EP  - "2342014-1"-"2342014-5"
SN  - 02182718
KW  - Black hole;quasinormal mode;gravitational wave
UR  - https://www.worldscientific.com/doi/10.1142/S0218271823420142
N2  - During the ringdown phase of a gravitational signal emitted by a black hole, the least damped quasinormal frequency dominates. If modifications to Einstein's theory induce noticeable deformations of the black-hole geometry only near the event horizon, the fundamental mode remains largely unaffected. However, even a small change near the event horizon can significantly impact the first few overtones, providing a means to probe the geometry of the event horizon. Overtones are stable against small deformations of spacetime at a distance from the black hole, allowing the event horizon to be distinguished from the surrounding environment. In contrast to echoes, overtones make a much larger energy contribution. These findings open up new avenues for future observations.
ER  - 

KONOPLYA, Roman. The sound of the event horizon. \textit{International Journal of Modern Physics D}. 2023, vol.~32, No~14, p.~''2342014-1''-''2342014-5'', 5 pp. ISSN~0218-2718. Available from: https://dx.doi.org/10.1142/S0218271823420142.