246 citations · 886 across the 11 of their papers we have counts for
5 papers · 1 filter
Tachyonic Preheating in Palatini Inflation
Alexandros Karam, Eemeli Tomberg, Hardi Veermäe
We study preheating in the Palatini formalism with a quadratic inflaton potential and an added term. In such models, the oscillating inflaton field repeatedly returns to the…
Did NANOGrav see a signal from primordial black hole formation?
Ville Vaskonen, Hardi Veermäe
We show that the recent NANOGrav result can be interpreted as a stochastic gravitational wave signal associated to formation of primordial black holes from high-amplitude curvature…
Lower bound on the primordial black hole merger rate
Ville Vaskonen, Hardi Veermäe
We derive a lower bound on the merger rate of primordial black hole (PBH) binaries by estimating the maximal fraction of binaries that were perturbed between formation in the early…
Electromagnetic probes of primordial black holes as dark matter
Y. Ali-Haimoud, S. Clesse, J. Garcia-Bellido +91
The LIGO discoveries have rekindled suggestions that primordial black holes (BHs) may constitute part to all of the dark matter (DM) in the Universe. Such suggestions came from 1)…
Collisionless shocks in self-interacting dark matter
Matti Heikinheimo, Martti Raidal, Christian Spethmann +1
Self-interacting dark matter has been proposed as a solution to small scale problems in cosmological structure formation, and hints of dark matter self scattering have been observe…