269 citations · 1.6k across the 55 of their papers we have counts for
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astro-ph.CO2020★ 146 cited
Gravitational Waves and Dark Radiation from Dark Phase Transition: Connecting NANOGrav Pulsar Timing Data and Hubble Tension
Yuichiro Nakai, Motoo Suzuki, Fuminobu Takahashi +1
Recent pulsar timing data reported by the NANOGrav collaboration may indicate the existence of a stochastic gravitational wave background around Hz. We explore a p…
astro-ph.CO2020★ 36 cited
Gravitational Waves from Primordial Magnetic Fields via Photon-Graviton Conversion
Tomohiro Fujita, Kohei Kamada, Yuichiro Nakai
We explore a novel process in the early Universe in which thermalized photons are converted into gravitons in the presence of strong primordial magnetic fields. It is found that th…