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8 papers · 1 filter
The status of KAGRA underground cryogenic gravitational wave telescope
KAGRA Collaboration, T. Akutsu, M. Ando +146
KAGRA is a 3-km interferometric gravitational wave telescope located in the Kamioka mine in Japan. It is the first km-class gravitational wave telescope constructed underground to…
Anomalous diffusion analysis of the lifting events in the event-chain Monte Carlo for the classical XY models
Kenji Kimura, Saburo Higuchi
We introduce a novel random walk model that emerges in the event-chain Monte Carlo (ECMC) of spin systems. In the ECMC, the lifting variable specifying the spin to be updated chang…
Note on Accuracy of the Post-Newtonian Approximation for Extreme-Mass Ratio Inspirals: Retrograde Orbits
Ryuichi Fujita, Norichika Sago, Hiroyuki Nakano
The post-Newtonian approximation is useful to discuss gravitational waveforms for binary inspirals. In this note, for retrograde circular orbits in the equatorial plane, we discuss…
Extracting the orbital axis from gravitational waves of precessing binary systems
Kyohei Kawaguchi, Koutarou Kyutoku, Hiroyuki Nakano +1
We present a new method for extracting the instantaneous orbital axis only from gravitational wave strains of precessing binary systems observed from a particular observer directio…
Estimation of starting times of quasinormal modes in ringdown gravitational waves with the Hilbert-Huang transform
Kazuki Sakai, Ken-ichi Oohara, Hiroyuki Nakano +2
It is known that a quasinormal mode (QNM) of a remnant black hole dominates a ringdown gravitational wave (GW) in a binary black hole (BBH) merger. To study properties of the QNMs,…
Post-Newtonian templates for binary black-hole inspirals: the effect of the horizon fluxes and the secular change in the black-hole masses and spins
Soichiro Isoyama, Hiroyuki Nakano
Black holes (BHs) in an inspiraling compact binary system absorb the gravitational-wave (GW) energy and angular-momentum fluxes across their event horizons and this leads to the se…