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27 papers
Secular evolution of orbital parameters for general bound orbits in Kerr spacetime
Norichika Sago, Ryuichi Fujita, Soichiro Isoyama +1
We analytically derive the secular changes of the orbital parameters, i.e., energy, angular momentum, and Carter constant, for general bound orbits in Kerr spacetime, at leading or…
5PN eccentric waveforms for intermediate-mass-ratio-inspirals (IMRIs) from post-Newtonian and black hole perturbation theory
M Laxman, Ryuichi Fujita, Chandra Kant Mishra
Detection of gravitational waves from compact binaries involving at least one intermediate mass black hole, and component mass ratios in the range -, are among the pr…
Post-Newtonian templates for phase evolution of spherical extreme mass ratio inspirals
Norichika Sago, Ryuichi Fujita, Hiroyuki Nakano
We present various post-Newtonian (PN) models for the phase evolution of compact objects moving along quasi-spherical orbits in Kerr spacetime derived by using the 12PN analytic fo…
Adiabatic waveforms from extreme-mass-ratio inspirals: an analytical approach
Soichiro Isoyama, Ryuichi Fujita, Alvin J. K. Chua +3
Scientific analysis for the gravitational-wave detector LISA will require theoretical waveforms from extreme-mass-ratio inspirals (EMRIs) that extensively cover all possible orbita…
Scope out multiband gravitational-wave observations of GW190521-like binary black holes with space gravitational wave antenna B-DECIGO
Hiroyuki Nakano, Ryuichi Fujita, Soichiro Isoyama +1
The gravitational wave event, GW190521 is the most massive binary black hole merger observed by ground-based gravitational wave observatories LIGO/Virgo to date. While the observed…
Extreme mass ratio inspirals on the equatorial plane in the adiabatic order
Ryuichi Fujita, Masaru Shibata
We compute gravitational waves from inspiraling stellar-mass compact objects on the equatorial plane of a massive spinning black hole (BH). Our inspiral orbits are computed by taki…