535 citations · 3.6k across the 70 of their papers we have counts for
5 papers · 1 filter
Cosmic microwave background and inflation in multi-fractional spacetimes
Gianluca Calcagni, Sachiko Kuroyanagi, Shinji Tsujikawa
We use FIRAS and Planck 2015 data to place observational bounds on inflationary scenarios in multi-fractional spacetimes with -derivatives. While a power-law expansion in the ge…
Improved calculation of the gravitational wave spectrum from kinks on infinite cosmic strings
Yuka Matsui, Koichiro Horiguchi, Daisuke Nitta +1
Gravitational wave observations provide unique opportunities to search for cosmic strings. One of the strongest sources of gravitational waves is discontinuities of cosmic strings,…
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…