Abstract LiteBIRD, the Lite (Light) satellite for the study of B-mode polarization and Inflation
from cosmic background Radiation Detection, is a space mission for primordial cosmology …

Using the global 21-cm signal measurement by the EDGES collaboration, we derive
constraints on the fraction of the dark matter that is in the form of primordial black holes …

A new effect is described by which primordial gravity waves leave a permanent signature in
the large scale structure of the Universe. The effect occurs at second order in perturbation …

Observed angular positions and redshifts of large-scale structure tracers such as galaxies
are affected by gravitational waves through volume distortion and magnification effects …

The effect of gravitational wave of cosmological wavelength on the gravitational lensing is
investigated. When the source, deflector, and observer are aligned in a highly symmetric …

The effect of gravitational wave of extremely low frequency on time delays between different
locations on the Einstein ring in a lens system with an aligned source-deflector-observer …

Observations of cosmic microwave background (CMB) temperature fluctuations have played
a pivotal role in establishing the standard cosmological model, called the cold dark matter …

The studies of the epoch of reionization and cosmology are among the primary science
goals of the Square Kilometre Array (SKA) radio telescope1. Usually the era between …