In this paper, we review in detail different mechanisms of generation of large primordial
fluctuations and their implications for the production of primordial black holes (PBHs) and …

We present the results of the search for an isotropic stochastic gravitational wave
background (GWB) at nanohertz frequencies using the second data release of the European …

The European Pulsar Timing Array (EPTA) and Indian Pulsar Timing Array (InPTA)
collaborations have measured a low-frequency common signal in the combination of their …

Various pulsar timing array (PTA) experiments (NANOGrav, EPTA, PPTA, CPTA, including
data from InPTA) very recently reported evidence for excess red common-spectrum signals …

Pulsar Timing Array experiments probe the presence of possible scalar or pseudoscalar
ultralight dark matter particles through decade-long timing of an ensemble of galactic …

We show that the recent detection of a gravitational wave (GW) background reported by
various pulsar timing array (PTA) collaborations including NANOGrav-15 yr, PPTA …

Several pulsar timing arrays including NANOGrav, EPTA, PPTA, and CPTA have recently
reported the observation of a stochastic background of gravitational wave spectrum in the …

We investigate the explicit role of negative local non-Gaussianity, f NL, in suppressing the
abundance of primordial black holes (PBHs) in the single-field model of Galileon inflation …

The observation of neutron stars enables the otherwise impossible study of fundamental
physical processes. The timing of binary radio pulsars is particularly powerful, as it enables …

We consider the production of secondary gravity waves in Galileon inflation with an ultra-
slow roll (USR) phase and show that the spectrum of scalar-induced gravitational waves …