405 citations · 2.7k across the 85 of their papers we have counts for
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The First Order Symmetry Operator on Gravitational Perturbations in the 5-dimensional Myers-Perry Spacetime with Equal Angular Momenta
Masataka Tsuchiya, Tsuyoshi Houri, Chul-Moon Yoo
It has been revealed that the first order symmetry operator for the linearized Einstein equation on a vacuum spacetime can be constructed from a Killing-Yano 3-form. This might be…
Spins of primordial black holes formed in the radiation-dominated phase of the universe: first-order effect
Tomohiro Harada, Chul-Moon Yoo, Kazunori Kohri +2
The standard deviation of the initial values of the nondimensional Kerr parameter of primordial black holes (PBHs) formed in the radiation-dominated phase of the universe i…
Dynamical Analysis of Screening in Scalar-Tensor Theory
Tomohiro Nakamura, Taishi Ikeda, Ryo Saito +2
We investigate linear and non-linear dynamics of spherically symmetric perturbations on a static configuration in scalar-tensor theories focusing on the chameleon screening mechani…
Abundance of Primordial Black Holes in Peak Theory for an Arbitrary Power Spectrum
Chul-Moon Yoo, Tomohiro Harada, Shin'ichi Hirano +1
We modify the procedure to estimate PBH abundance proposed in arXiv:1805.03946 so that it can be applied to a broad power spectrum such as the scale-invariant flat power spectrum.…
Current status of space gravitational wave antenna DECIGO and B-DECIGO
Seiji Kawamura, Masaki Ando, Naoki Seto +84
Deci-hertz Interferometer Gravitational Wave Observatory (DECIGO) is the future Japanese space mission with a frequency band of 0.1 Hz to 10 Hz. DECIGO aims at the detection of pri…
Threshold of Primordial Black Hole Formation in Nonspherical Collapse
Chul-Moon Yoo, Tomohiro Harada, Hirotada Okawa
We perform (3+1)-dimensional simulations of primordial black hole (PBH) formation starting from the spheroidal super-horizon perturbations. We investigate how the ellipticity (prol…