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Pathology in WKB wave function for tunneling assisted by gravity
Stefano Ansoldi, Takahiro Tanaka
There are several exotic tunneling processes that can be realized only by incorporating the effect of gravity. Here, we point out that we encounter difficulties in constructing the…
Impact of multiple modes on the evolution of self-interacting axion condensate around rotating black holes
Hidetoshi Omiya, Takuya Takahashi, Takahiro Tanaka +1
Ultra-light particles, such as axions, form a macroscopic condensate around a highly spinning black hole by the superradiant instability. Due to its macroscopic nature, the condens…
Resonant jumps induced by stationary tidal perturbation: a two-for-one deal
Priti Gupta, Takafumi Kakehi, Takahiro Tanaka
Extreme-mass-ratio inspirals (EMRIs) are promising target sources for space-based interferometers such as LISA, Taiji, and Tianqin. Depending on the astrophysical environment, such…
Assessing the impact of non-Gaussian noise on convolutional neural networks that search for continuous gravitational waves
Takahiro S. Yamamoto, Andrew L. Miller, Magdalena Sieniawska +1
We present a convolutional neural network that is capable of searching for continuous gravitational waves, quasi-monochromatic, persistent signals arising from asymmetrically rotat…
Quasinormal modes of Schwarzschild black holes on the real axis
Koutarou Kyutoku, Hayato Motohashi, Takahiro Tanaka
We study the scattering of gravitational waves by a Schwarzschild black hole and its perturbed siblings to investigate influences of proposed spectral instability of quasinormal mo…
Modeling transient resonances in extreme-mass-ratio inspirals
Priti Gupta, Lorenzo Speri, Béatrice Bonga +2
Extreme-mass-ratio inspirals are one of the most exciting and promising target sources for space-based interferometers (such as LISA, TianQin). The observation of their emitted gra…