305 citations · 2.9k across the 49 of their papers we have counts for
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Hunting for Statistical Anisotropy in Tensor Modes with B-mode Observations
Takashi Hiramatsu, Shuichiro Yokoyama, Tomohiro Fujita +1
We investigate a possibility of constraining statistical anisotropies of the primordial tensor perturbations by using future observations for the Cosmic Microwave Background (CMB)…
Relativistic stars in degenerate higher-order scalar-tensor theories after GW170817
Tsutomu Kobayashi, Takashi Hiramatsu
We study relativistic stars in degenerate higher-order scalar-tensor theories that evade the constraint on the speed of gravitational waves imposed by GW170817. It is shown that th…
Reconstruction of primordial tensor power spectra from B-mode polarization of the cosmic microwave background
Takashi Hiramatsu, Eiichiro Komatsu, Masashi Hazumi +1
Given observations of B-mode polarization power spectrum of the cosmic microwave background (CMB), we can reconstruct power spectra of primordial tensor modes from the early Univer…
Anti-screening of the Galileon force around a disk center hole
Hiromu Ogawa, Takashi Hiramatsu, Tsutomu Kobayashi
The Vainshtein mechanism is known as an efficient way of screening the fifth force around a matter source in modified gravity. This has been verified mainly in highly symmetric mat…