30 citations · 117 across the 11 of their papers we have counts for
11 papers
Constraints on ultra-low-frequency gravitational waves from an eccentric supermassive black hole binary
Tomonosuke Kikunaga, Shinnosuke Hisano, Hiroki Kumamoto +1
Milli-second pulsars with highly stable periods can be considered as very precise clocks and can be used for pulsar timing array (PTA) which attempts to detect nanoheltz gravitatio…
Flux density variability of 286 radio pulsars from a decade of monitoring
H. Kumamoto, S. Dai, S. Johnston +7
The Parkes telescope has been monitoring 286 radio pulsars approximately monthly since 2007 at an observing frequency of 1.4 GHz. The wide dispersion measure (DM) range of the puls…
Constraints on ultra-low-frequency gravitational waves with statistics of pulsar spin-down rates II: Mann-Whitney U test
H. Kumamoto, S. Hisano, K. Takahashi
We investigate gravitational waves with sub-nanoHz frequencies ( Hz Hz) from the spatial distribution of the spin-down rates of mil…
Discovery of Millisecond Pulsars in the Globular Cluster Omega Centauri
Shi Dai, Simon Johnston, Matthew Kerr +4
The globular cluster Omega Centauri is the most massive and luminous cluster in the Galaxy. The -ray source FL8Y J1326.74729 is coincident with the core of the cluster, leadi…
Constraints on ultra-low-frequency gravitational waves with statistics of pulsar spin-down rates
Hiroki Kumamoto, Yuya Imasato, Naoyuki Yonemaru +2
We probe ultra-low-frequency gravitational waves (GWs) with statistics of spin-down rates of milli-second pulsars (MSPs) by a method proposed in our prevous work (Yonemaru et al. 2…
Detailed study of detection method for ultra-low-frequency gravitational waves with pulsar spin-down rate statistics
Shinnosuke Hisano, Naoyuki Yonemaru, Hiroki Kumamoto +1
A new detection method for gravitational waves (GWs) with ultra-low frequencies (), which is much lower than the range of pulsar timing array…
Artificial neural networks for selection of pulsar candidates from the radio continuum surveys
Naoyuki Yonemaru, Keitaro Takahashi, Hiroki Kumamoto +3
Pulsar search with time-domain observation is very computationally expensive and data volume will be enormous with the next generation telescopes such as the Square Kilometre Array…
Sensitivity of new detection method for ultra-low frequency gravitational waves with pulsar spin-down rate statistics
Naoyuki Yonemaru, Hiroki Kumamoto, Keitaro Takahashi +1
A new detection method for ultra-low frequency gravitational waves (GWs) with a frequency much lower than the observational range of pulsar timing arrays (PTAs) was suggested in Yo…
Anisotropies in the gravitational wave background as a probe of the cosmic string network
Sachiko Kuroyanagi, Keitaro Takahashi, Naoyuki Yonemaru +1
Pulsar timing arrays are one of the powerful tools to test the existence of cosmic strings through searching for the gravitational wave background. The amplitude of the background…
SKA-Japan Pulsar Science with the Square Kilometre Array
Keitaro Takahashi, Takahiro Aoki, Kengo Iwata +10
The Square Kilometre Array will revolutionize pulsar studies with its wide field-of-view, wide-band observation and high sensitivity, increasing the number of observable pulsars by…
Gravitational waves from an SMBH binary in M87
Naoyuki Yonemaru, Hiroki Kumamoto, Sachiko Kuroyanagi +2
In this paper, we study gravitational-wave (GW) emission from a hypothetical supermassive black-hole (SMBH) binary at the center of M87. The existence of a SMBH other than that usu…