316 citations · 6.1k across the 158 of their papers we have counts for
159 papers
Gravitational wave search through electromagnetic telescopes
Asuka Ito, Kazunori Kohri, Kazunori Nakayama
We study the graviton-photon conversion in the magnetic fields of the Earth, the Milky Way Galaxy, and intergalactic regions. Requiring that the photon flux converted from graviton…
Dark matter detection using nuclear magnetization in magnet with hyperfine interaction
So Chigusa, Takeo Moroi, Kazunori Nakayama +1
We consider the possibility to detect cosmic light dark matter (DM), i.e., axions and dark photons, of mass eV and eV, by magnetic excitation in a mag…
Nanohertz gravitational waves from cosmic strings and dark photon dark matter
Naoya Kitajima, Kazunori Nakayama
The recent observations by pulsar timing array (PTA) experiments suggest the existence of stochastic gravitational wave background in the nano-Hz range. It can be a hint for the ne…
Quantum decay of scalar and vector boson stars and oscillons into gravitons
Kazunori Nakayama, Fuminobu Takahashi, Masaki Yamada
We point out that a soliton such as an oscillon or boson star inevitably decays into gravitons through gravitational interactions. These decay processes exist even if there are no…
Probing high frequency gravitational waves with pulsars
Asuka Ito, Kazunori Kohri, Kazunori Nakayama
We study graviton-photon conversion in magnetosphere of a pulsar and explore the possibility of detecting high frequency gravitational waves with pulsar observations. It is shown t…
Viable Vector Coherent Oscillation Dark Matter
Naoya Kitajima, Kazunori Nakayama
We construct a viable model of the vector coherent oscillation dark matter. The vector boson is coupled to the inflaton through the kinetic function so that the effective Hubble ma…