1.1k citations · 2.5k across the 11 of their papers we have counts for
11 papers
Charge-regular formulation and radiative amplitudes of Kerr-Newman perturbations
Hayato Motohashi
We establish a charge-regular formulation of separated Kerr--Newman perturbations and an explicit map from master solutions to physical radiative fields. We derive regular angular…
Beyond ΛCDM with the SKA Observatory -- II: Unveiling the Secrets of the Early Universe
José Fonseca, Benedict Bahr-Kalus, Mario Ballardini +12
The origins of the universe remain one of the biggest mysteries in modern cosmology. While the Planck satellite has provided a wealth of information about the early universe, there…
Third-order corrections to the slow-roll expansion: calculation and constraints with Planck, ACT, SPT, and BICEP/Keck
Mario Ballardini, Alessandro Davoli, Salvatore Samuele Sirletti
We investigate the primordial power spectra (PPS) of scalar and tensor perturbations, derived through the slow-roll approximation. By solving the Mukhanov-Sasaki equation and the t…
Chasing cosmic inflation: constraints for inflationary models and reheating insights
Mario Ballardini
We investigate the impact of different choice of prior's range for the reheating epoch on cosmic inflation parameter inference in light of cosmic microwave background (CMB) anisotr…
Cosmological effects of the Galileon term in Scalar-Tensor Theories
A. G. Ferrari, M. Ballardini, F. Finelli +2
We study the cosmological effects of a Galileon term in scalar-tensor theories of gravity. The subset of scalar-tensor theories considered are characterized by a non-minimal coupli…
Planck 2018 results. V. CMB power spectra and likelihoods
Planck Collaboration, N. Aghanim, Y. Akrami +165
This paper describes the 2018 Planck CMB likelihoods, following a hybrid approach similar to the 2015 one, with different approximations at low and high multipoles, and implementin…
Cosmological constraints on post-Newtonian parameters in effectively massless scalar-tensor theories of gravity
M. Rossi, M. Ballardini, M. Braglia +4
We study the cosmological constraints on the variation of the Newton's constant and on post-Newtonian parameters for simple models of scalar-tensor theory of gravity beyond the ext…
Isocurvature fluctuations in the effective Newton's constant
D. Paoletti, M. Braglia, F. Finelli +2
We present a new isocurvature mode present in scalar-tensor theories of gravity that corresponds to a regular growing solution in which the energy of the relativistic degrees of fr…
Probing primordial features with future galaxy surveys
Mario Ballardini, Fabio Finelli, Cosimo Fedeli +1
We study the capability of future measurements of the galaxy clustering power spectrum to probe departures from a power-law spectrum for primordial fluctuations. On considering the…
Planck intermediate results. XLIX. Parity-violation constraints from polarization data
Planck Collaboration, N. Aghanim, M. Ashdown +148
Parity violating extensions of the standard electromagnetic theory cause in vacuo rotation of the plane of polarization of propagating photons. This effect, also known as cosmic bi…
A conservative assessment of the current constraints on dark matter annihilation from Cosmic Rays and CMB observations
Nicolò Masi, Mario Ballardini
In view of the current interest in combining different observations to constraint annihilating WIMP dark matter, we examine the relation between the Sommerfeld effect at the recomb…