851 citations · 5.2k across the 133 of their papers we have counts for
133 papers
Post-Inflationary Constraints on Nonminimally Coupled Quintessential Inflation
Min Gi Park, Seong Chan Park, Tomo Takahashi +1
We investigate quintessential inflation in a nonminimally coupled scalar-tensor theory, parameterizing the post-inflationary radiation abundance independently of the reheating mech…
Stochastic gravitational wave background from early dark energy
Naoya Kitajima, Tomo Takahashi
We study the production of stochastic gravitational wave background from early dark energy (EDE) model. It is caused by resonant amplification of scalar field fluctuations, which e…
Impact of big bang nucleosynthesis on the H0 tension
Tomo Takahashi, Yo Toda
We investigate the impact of big bang nucleosynthesis (BBN) on the Hubble tension, focusing on how the treatment of the reaction rate and observational data affect the evaluation o…
Variation of the fine structure constant in the light of recent helium abundance measurement
Osamu Seto, Tomo Takahashi, Yo Toda
We point out that the recent result of primordial helium-4 (He) abundance measurement by EMPRESS, which has reported a smaller He abundance than other measurements, can be…
EDGES and JWST with 21cm global signal emulator
Shintaro Yoshiura, Teppei Minoda, Tomo Takahashi
The 21cm global signal is an important probe to reveal the properties of the first astrophysical objects and the processes of the structure formation from which one can constrain a…
Supermassive primordial black holes: a view from clustering of quasars at
Takumi Shinohara, Wanqiu He, Yoshiki Matsuoka +3
We investigate a scenario where primordial black holes (PBHs) can be the progenitors of supermassive black holes (SMBHs) observed at . To this end, we carried out clusterin…