Spectral instability of parametrized black hole quasinormal modes in the high-overtone limit via the exact WKB analysis

Taiga Miyachi, Ryo Namba, Hidetoshi Omiya +1

We study the asymptotic behavior of parametrized black hole quasinormal modes (QNMs) in the high-overtone limit. To gain insights into their analytical structure, we apply the exac…