151 citations · 241 across the 6 of their papers we have counts for
10 papers
CMB Constraints on the Stochastic Gravitational-Wave Background at Mpc scales
Toshiya Namikawa, Shohei Saga, Daisuke Yamauchi +1
We present robust constraints on the stochastic gravitational waves (GWs) at Mpc scales from the cosmic microwave background (CMB) data. CMB constraints on GWs are usually characte…
On the screening mechanism in DHOST theories evading gravitational wave constraints
Shin'ichi Hirano, Tsutomu Kobayashi, Daisuke Yamauchi
We consider a subclass of degenerate higher-order scalar-tensor (DHOST) theories in which gravitational waves propagate at the speed of light and do not decay into scalar fluctuati…
Constraining DHOST theories with linear growth of matter density fluctuations
Shin'ichi Hirano, Tsutomu Kobayashi, Daisuke Yamauchi +1
We investigate the potential of cosmological observations, such as galaxy surveys, for constraining degenerate higher-order scalar-tensor (DHOST) theories, focusing in particular o…
Large-scale inhomogeneity of dark energy produced in the ancestor vacuum
Yue Nan, Kazuhiro Yamamoto, Hajime Aoki +2
We investigate large-scale inhomogeneity of dark energy in the bubble nucleation scenario of the universe. In this scenario, the present universe was created by a bubble nucleation…
Euclid & SKA Synergies
Thomas D. Kitching, David Bacon, Michael L. Brown +7
Over the past few years two of the largest and highest fidelity experiments conceived have been approved for construction: Euclid is an ESA M-Class mission that will map three-quar…
Overview of Complementarity and Synergy with Other Wavelengths in Cosmology in the SKA era
Keitaro Takahashi, Michael L. Brown, Carlo Burigana +9
We give an overview of complementarity and synergy in cosmology between the Square Kilometre Array and future survey projects in other wavelengths. In the SKA era, precision cosmol…