271 citations · 820 across the 27 of their papers we have counts for
18 papers · 1 filter
Decadal upgrade strategy for KAGRA toward post-O5 gravitational-wave astronomy
KAGRA Collaboration, T. Akutsu, M. Ando +150
The KAGRA Collaboration has investigated a ten-year upgrade strategy for the KAGRA gravitational wave detector, considering a total of 14 upgrade options that vary in mirror mass,…
Identification of Noise-Associated Glitches in KAGRA O3GK with Hveto
T. Akutsu, M. Ando, M. Aoumi +148
Transient noise ("glitches") in gravitational wave detectors can mimic or obscure true signals, significantly reducing detection sensitivity. Identifying and excluding glitch-conta…
Distinguishing a stochastic gravitational-wave signal from correlated noise with joint parameter estimation: Fisher analysis for ground-based detectors
Yoshiaki Himemoto, Atsushi Nishizawa, Atsushi Taruya
Search sensitivity to a stochastic gravitational-wave background (SGWB) is enhanced by cross-correlating detector signals. However, one of the most serious concerns is the environm…
Input optics systems of the KAGRA detector during O3GK
T. Akutsu, M. Ando, K. Arai +246
KAGRA, the underground and cryogenic gravitational-wave detector, was operated for its solo observation from February 25th to March 10th, 2020, and its first joint observation with…
Impacts of overlapping gravitational-wave signals on the parameter estimation: Toward the search for cosmological backgrounds
Yoshiaki Himemoto, Atsushi Nishizawa, Atsushi Taruya
Third-generation gravitational wave detectors, such as the Einstein Telescope and Cosmic Explorer, will detect a bunch of gravitational-wave (GW) signals originating from the coale…
Overview of KAGRA : KAGRA science
KAGRA Collaboration, T. Akutsu, M. Ando +240
KAGRA is a newly build gravitational-wave observatory, a laser interferometer with 3 km arm length, located in Kamioka, Gifu, Japan. In this paper in the series of KAGRA-featured a…
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…
Effective Search Templates for a Primordial Stochastic Gravitational Wave Background
Takeshi Chiba, Yoshiaki Himemoto, Masahide Yamaguchi +1
We calculate the signal-to-noise ratio (SNR) of the stochastic gravitational-wave background in an extreme case that its spectrum has a sharp falloff with its amplitude close to th…
Detecting a stochastic background of gravitational waves in the presence of non-Gaussian noise: A performance of generalized cross-correlation statistic
Yoshiaki Himemoto, Atsushi Taruya, Hideaki Kudoh +1
We discuss a robust data analysis method to detect a stochastic background of gravitational waves in the presence of non-Gaussian noise. In contrast to the standard cross-correlati…
Detecting a gravitational-wave background with next-generation space interferometers
Hideaki Kudoh, Atsushi Taruya, Takashi Hiramatsu +1
Future missions of gravitational-wave astronomy will be operated by space-based interferometers, covering very wide range of frequency. Search for stochastic gravitational-wave bac…
Geometry and cosmological perturbations in the bulk inflaton model
Masato Minamitsuji, Yoshiaki Himemoto, Misao Sasaki
We consider a braneworld inflation model driven by the dynamics of a scalar field living in the 5-dimensional bulk, the so-called ``bulk inflaton model'', and investigate the geome…
Braneworld inflation driven by dynamics of a bulk scalar field
Yoshiaki Himemoto, Misao Sasaki
We review a viable alternative scenario of the inflationary universe in the context of the Randall-Sundrum (RS) braneworld. In this scenario, the dynamics of a 5-dimensional scalar…
Generation of dark radiation in the bulk inflaton model
Takahiro Tanaka, Yoshiaki Himemoto
We investigate the dynamics of a bulk scalar field with various decay channels in the Randall-Sundrum infinite braneworld scenario. A bulk scalar field in this scenario has a quasi…
Braneworld reheating in the bulk inflaton model
Yoshiaki Himemoto, Takahiro Tanaka
In the context of the braneworld inflation driven by a bulk scalar field, we study the energy dissipation from the bulk scalar field into the matter on the brane in order to unders…
Bulk scalar field in the braneworld can mimic the 4D inflaton dynamics
Yoshiaki Himemoto, Takahiro Tanaka, Misao Sasaki
Based on the recently proposed scenario of inflation driven by a bulk scalar field in the braneworld of the Randall-Sundrum (RS) type, we investigate the dynamics of a bulk scalar…
Quantum fluctuations in brane-world inflation without inflaton on the brane
Norichika Sago, Yoshiaki Himemoto, Misao Sasaki
A Randall-Sundrum type brane-cosmological model in which slow-roll inflation on the brane is driven solely by a bulk scalar field was recently proposed by Himemoto and Sasaki. We a…
Brane-world inflation without inflaton on the brane
Yoshiaki Himemoto, Misao Sasaki
Inspired by the Randall-Sundrum brane-world scenario, we investigate the possibility of brane-world inflation driven not by an inflaton field on the brane, but by a bulk, dilaton-l…
Generalization of the model of Hawking radiation with modified high frequency dispersion relation
Yoshiaki Himemoto, Takahiro Tanaka
The Hawking radiation is one of the most interesting phenomena predicted by the theory of quantum field in curved space. The origin of Hawking radiation is closely related to the f…