829 citations · 3.5k across the 33 of their papers we have counts for
32 papers · 1 filter
Cosmological Signatures of Curvature-Coupled Dark Energy
Abdolali Banihashemi, Farbod Hassani, Alessandro Casalino +2
We study a curvature-coupled dark energy model that can modify cosmological evolution both before recombination and during the late-time accelerated era. The model belongs to the c…
mochi_class: Modelling Optimisation to Compute Horndeski In class
Matteo Cataneo, Emilio Bellini
We introduce mochi_class, an extension of the Einstein-Boltzmann solver hi_class, designed to unlock the full phenomenological potential of Horndeski gravity. This extension allows…
Euclid: Constraining linearly scale-independent modifications of gravity with the spectroscopic and photometric primary probes
N. Frusciante, F. Pace, V. F. Cardone +127
The future Euclid space satellite mission will offer an invaluable opportunity to constrain modifications to Einstein's general relativity at cosmic scales. We focus on modified gr…
Probing Dark Energy and Modifications of Gravity with Ground-Based Millimeter-Wavelength Line Intensity Mapping
Azadeh Moradinezhad Dizgah, Emilio Bellini, Garrett K. Keating
Line intensity mapping (LIM) can provide a powerful means to constrain the theory of gravity and the nature of dark energy at low and high redshifts by mapping the large-scale stru…
Euclid: Validation of the MontePython forecasting tools
S. Casas, J. Lesgourgues, N. Schöneberg +124
The Euclid mission of the European Space Agency will perform a survey of weak lensing cosmic shear and galaxy clustering in order to constrain cosmological models and fundamental p…
Testing gravity with gravitational wave friction and gravitational slip
Isabela S. Matos, Emilio Bellini, Maurício O. Calvão +1
Gravitational waves (GWs) emitted by binary sources are interesting signals for testing gravity on cosmological scales since they allow measurements of the luminosity distance. Whe…
The growth of density perturbations in the last 10 billion years from tomographic large-scale structure data
Carlos García-García, Jaime Ruiz Zapatero, David Alonso +5
In order to investigate the origin of the ongoing tension between the amplitude of matter fluctuations measured by weak lensing experiments at low redshifts and the value inferred…
Fully relativistic predictions in Horndeski gravity from standard Newtonian N-body simulations
Guilherme Brando, Kazuya Koyama, David Wands +3
The N-body gauge allows the introduction of relativistic effects in Newtonian cosmological simulations. Here we extend this framework to general Horndeski gravity theories, and inv…
Theoretical priors in scalar-tensor cosmologies: Shift-symmetric Horndeski models
Dina Traykova, Emilio Bellini, Pedro G. Ferreira +3
Attempts at constraining theories of late time accelerated expansion often assume broad priors for the parameters in their phenomenological description. Focusing on shift-symmetric…
Comparison of different approaches to the quasi-static approximation in Horndeski models
Francesco Pace, Richard Battye, Emilio Bellini +3
A quasi-static approximation (QSA) for modified gravity can be applied in a number of ways. We consider three different analytical formulations based on applying this approximation…
Cross-correlating radio continuum surveys and CMB lensing: constraining redshift distributions, galaxy bias and cosmology
David Alonso, Emilio Bellini, Catherine Hale +2
We measure the harmonic-space auto-power spectrum of the galaxy overdensity in the LOFAR Two-metre Sky Survey (LoTSS) First Data Release and its cross correlation with the map of t…
Theoretical priors in scalar-tensor cosmologies: Thawing quintessence
Carlos García-García, Emilio Bellini, Pedro G. Ferreira +2
The late time acceleration of the Universe can be characterized in terms of an extra, time dependent, component of the universe -- dark energy. The simplest proposal for dark energ…
hi_class: Background Evolution, Initial Conditions and Approximation Schemes
Emilio Bellini, Ignacy Sawicki, Miguel Zumalacárregui
Cosmological datasets have great potential to elucidate the nature of dark energy and test gravity on the largest scales available to observation. Theoretical predictions can be co…
Disconnected pseudo- covariances for projected large-scale structure data
Carlos García-García, David Alonso, Emilio Bellini
The disconnected part of the power spectrum covariance matrix (also known as the "Gaussian" covariance) is the dominant contribution on large scales for galaxy clustering and weak…
Sheer shear: weak lensing with one mode
Emilio Bellini, David Alonso, Shahab Joudaki +1
3D data compression techniques can be used to determine the natural basis of radial eigenmodes that encode the maximum amount of information in a tomographic large-scale structure…
The phenomenology of beyond Horndeski gravity
Dina Traykova, Emilio Bellini, Pedro G. Ferreira
We study the phenomenology of the beyond Horndeski class of scalar-tensor theories of gravity, which on cosmological scales can be characterised in terms of one extra function of t…
Strong constraints on cosmological gravity from GW170817 and GRB 170817A
Tessa Baker, Emilio Bellini, Pedro G. Ferreira +3
The detection of an electromagnetic counterpart (GRB 170817A) to the gravitational wave signal (GW170817) from the merger of two neutron stars opens a completely new arena for test…
A comparison of Einstein-Boltzmann solvers for testing General Relativity
E. Bellini, A. Barreira, N. Frusciante +24
We compare Einstein-Boltzmann solvers that include modifications to General Relativity and find that, for a wide range of models and parameters, they agree to a high level of preci…
Hiding neutrino mass in modified gravity cosmologies
Nicola Bellomo, Emilio Bellini, Bin Hu +3
Cosmological observables show a dependence with the neutrino mass, which is partially degenerate with parameters of extended models of gravity. We study and explore this degeneracy…
Early Cosmology Constrained
Licia Verde, Emilio Bellini, Cassio Pigozzo +2
We investigate our knowledge of early universe cosmology by exploring how much additional energy density can be placed in different components beyond those in the CDM model. To…
The Observational Future of Cosmological Scalar-Tensor Theories
David Alonso, Emilio Bellini, Pedro G. Ferreira +1
The next generation of surveys will greatly improve our knowledge of cosmological gravity. In this paper we focus on how Stage IV photometric redshift surveys, including weak lensi…
hi_class: Horndeski in the Cosmic Linear Anisotropy Solving System
Miguel Zumalacarregui, Emilio Bellini, Ignacy Sawicki +2
We present the public version of hi_class (www.hiclass-code.net), an extension of the Boltzmann code CLASS to a broad ensemble of modifications to general relativity. In particular…
Beyond CDM: Problems, solutions, and the road ahead
Philip Bull, Yashar Akrami, Julian Adamek +37
Despite its continued observational successes, there is a persistent (and growing) interest in extending cosmology beyond the standard model, CDM. This is motivated by a range o…
Constraints on deviations from CDM within Horndeski gravity
Emilio Bellini, Antonio J. Cuesta, Raul Jimenez +1
Recent anomalies found in cosmological datasets such as the low multipoles of the Cosmic Microwave Background or the low redshift amplitude and growth of clustering measured by e.g…