101 citations · 792 across the 54 of their papers we have counts for
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Effective speed of gravitational waves
Antonio Enea Romano
We derive an effective equation and action for the propagation of gravitational waves (GW), encoding the effects of interaction and self-interaction in a time, frequency and polari…
Effects of the shape of curvature peaks on the size of primordial black holes
Albert Escrivà, Antonio Enea Romano
We simulate numerically the formation of spherically symmetric primordial black holes (PBHs) seeded by different families of primordial curvature perturbations profiles on a Friedm…
Model-independent approach to effective sound speed in multi-field inflation
Antonio Enea Romano, Sergio Andrés Vallejo-Peña, Krzysztof Turzyński
For any physical system satisfying the Einstein's equations, the comoving curvature perturbations satisfy an equation involving the momentum-dependent effective sound speed, valid…
Deep learning merger masses estimation from gravitational waves signals in the frequency domain
Juan Pablo Marulanda, Camilo Santa, Antonio Enea Romano
Detection of gravitational waves (GW) from compact binary mergers provide a new window into multi-messenger astrophysics. The standard technique to determine the merger parameters…
Combining gravitational and electromagnetic waves observations to investigate local structure and the Hubble tension
Brayan Yamid Del Valle Mazo, Antonio Enea Romano, Maryi Alejandra Carvajal Quintero
Recent estimations of the Hubble parameter based on gravitational waves (GW) observations can be used to shed some light on the discrepancy between the value of the Hubble pa…
Effects of the modification of gravity on the production of primordial black holes
Sergio Andres Vallejo-Pena, Antonio Enea Romano
The enhancement of the spectrum of primordial comoving curvature perturbation can induce the production of primordial black holes (PBH) which could account for part of present…
Constraining gravity theories with the gravitational stability mass
Camilo Santa, Antonio Enea Romano
The measurement of the size of gravitationally bounded structures is an important test of gravity theories. For a given radius different theories can in fact predict a different gr…
The MESS of cosmological perturbations
Antonio Enea Romano, Sergio A. Vallejo Pena
We introduce two new effective quantities for the study of comoving curvature perturbations : the space dependent effective sound speed (SESS) and the momentum dependent effecti…
The effects of anisotropy and non-adiabaticity on the evolution of comoving curvature perturbation
Atsushi Naruko, Antonio Enea Romano, Misao Sasaki +1
We derive the equation for the evolution of the curvature perturbation on the comoving time slice, , in the presence of anisotropic and non-adiabatic terms in the en…
Newton gauge cosmological perturbations for static spherically symmetric modifications of the de Sitter metric
Camilo Santa Velez, Antonio Enea Romano
Static coordinates can be convenient to solve the vacuum Einstein's equations in presence of spherical symmetry, but for cosmological applications comoving coordinates are more sui…
General background conditions for K-bounce and adiabaticity
Antonio Enea Romano
We study the background conditions for a bounce uniquely driven by a single scalar field model with a generalized kinetic term , without any additional matter field. At the b…
Global adiabaticity and non-Gaussianity consistency condition
Antonio Enea Romano, Sander Mooij, Misao Sasaki
In the context of single-field inflation, the conservation of the curvature perturbation on comoving slices, , on super-horizon scales is one of the assumptions necessary to…
Adiabaticity and gravity theory independent conservation laws for cosmological perturbations
Antonio Enea Romano, Sander Mooij, Misao Sasaki
We carefully study the implications of adiabaticity for the behavior of cosmological perturbations. There are essentially three similar but different definitions of non-adiabaticit…
Can Brans-Dicke theory with describe stars?
Sourav Bhattacharya, Konstantinos F. Dialektopoulos, Antonio Enea Romano +1
A step-by-step approach is followed to study cosmic structures in the context of Brans-Dicke theory with positive cosmological constant and parameter . First, it is shown th…
Low red-shift effects of local structure on the Hubble parameter in presence of a cosmological constant
Antonio Enea Romano, Sergio Andres Vallejo
In order to estimate the effects of local structure on the Hubble parameter we calculate the low-redshift expansion for and for an observer at the center of a…
Apparent versus true value of the cosmological constant
Antonio Enea Romano, Pisin chen
Supernovae observations strongly support the presence of a cosmological constant, but its value, which we will call apparent, is normally determined assuming that the universe can…
A discrete estimation of the uncertainty of the background redshift and its effects on cosmological parameters
Antonio Enea Romano
We develop a discrete model to account for the effects of inhomogeneities on the redshift of photons. Using this model we compute the probability distribution of the observed redsh…
Discrete gravity from statistical mechanics
Antonio Enea Romano
We show how to construct space time lattices with a Regge action proportional to the energy of a given Ising or Potts model macrostate. This allows to take advantage of the existen…
Effects of particle production during inflation
Antonio Enea Romano, Misao Sasaki
The impact of particle production during inflation on the primordial curvature perturbation spectrum is investigated both analytically and numerically. We obtain an oscillatory beh…
Godel-type space-time metrics
Antonio Enea Romano, Charles Goebel
A simple group theoretic derivation is given of the family of space-time metrics with isometry group SO(2,1) X SO(2) X R first described by Godel, of which the Godel stationary cos…