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The possible existence of Pop III NS-BH binary and its detectability
Tomoya Kinugawa, Takashi Nakamura, Hiroyuki Nakano
In the population synthesis simulations of Pop III stars, many BH (Black Hole)-BH binaries with merger time less than the age of the Universe are formed, while NS (Ne…
Pre-DECIGO can get the smoking gun to decide the astrophysical or cosmological origin of GW150914-like binary black holes
Takashi Nakamura, Masaki Ando, Tomoya Kinugawa +9
Pre-DECIGO consists of three spacecraft arranged in an equilateral triangle with 100km arm lengths orbiting 2000km above the surface of the earth. It is hoped that the launch date…
Gravitational wave quasinormal mode from Population III massive black hole binaries in various models of population synthesis
Tomoya Kinugawa, Hiroyuki Nakano, Takashi Nakamura
Focusing on the remnant black holes after merging binary black holes, we show that ringdown gravitational waves of Population III binary black holes mergers can be detected with th…
Possible confirmation of the existence of ergoregion by the Kerr quasinormal mode in gravitational waves from Pop III massive black hole binary
Tomoya Kinugawa, Hiroyuki Nakano, Takashi Nakamura
The existence of the ergoregion of the Kerr space-time has not been confirmed observationally yet. We show that the confirmation would be possible by observing the quasinormal mode…