404 citations · 3.5k across the 37 of their papers we have counts for
38 papers
Impact of sky localization uncertainty on ringdown inference
Kallol Dey, Enrico Barausse, Marco Crisostomi +1
As gravitational-wave ringdown signals grow louder, quasinormal-mode inference depends increasingly on the treatment of extrinsic parameters. Standard analyses fix sky localization…
labrador: A domain-optimized machine-learning tool for gravitational wave inference
Javier Roulet, Marco Crisostomi, Lucy M. Thomas +1
Fast and reliable inference of gravitational-wave source parameters is crucial for analyzing large catalogs that are reaching the size of hundreds of detections, and for identifyin…
Beyond diagonal approximations: improved covariance modeling for pulsar timing array data analysis
Marco Crisostomi, Rutger van Haasteren, Patrick M. Meyers +1
Pulsar Timing Array (PTA) searches for nHz gravitational-wave backgrounds (GWBs) typically model time-correlated noise by assuming a diagonal covariance in Fourier space, neglectin…
Fixing the dynamical evolution of self-interacting vector fields
Marcelo E. Rubio, Guillermo Lara, Miguel Bezares +2
Numerical simulations of the Cauchy problem for self-interacting massive vector fields often face instabilities and apparent pathologies. We explicitly demonstrate that these issue…
Rapid parameter estimation for pulsar-timing-array datasets with variational inference and normalizing flows
Michele Vallisneri, Marco Crisostomi, Aaron D. Johnson +1
In the gravitational-wave analysis of pulsar-timing-array datasets, parameter estimation is usually performed using Markov Chain Monte Carlo methods to explore posterior probabilit…
Bayesian evidence estimation from posterior samples with normalizing flows
Rahul Srinivasan, Marco Crisostomi, Roberto Trotta +2
We propose a novel method (), based on normalizing flows, to estimate the Bayesian evidence (and its numerical uncertainty) from a pre-existing set of samples drawn from the…
Implications of the pulsar timing array detections for massive black hole mergers in the LISA band
Enrico Barausse, Kallol Dey, Marco Crisostomi +3
The recent evidence of a stochastic background of gravitational waves in the nHz band by pulsar-timing array (PTA) experiments has shed new light on the formation and evolution of…
The second data release from the European Pulsar Timing Array: IV. Implications for massive black holes, dark matter and the early Universe
J. Antoniadis, P. Arumugam, S. Arumugam +111
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 second and fir…
Neural Posterior Estimation with guaranteed exact coverage: the ringdown of GW150914
Marco Crisostomi, Kallol Dey, Enrico Barausse +1
We analyze the ringdown phase of the first detected black-hole merger, GW150914, using a simulation-based inference pipeline based on masked autoregressive flows. We obtain approxi…
Robustness of kinetic screening against matter coupling
Guillermo Lara, Miguel Bezares, Marco Crisostomi +1
We investigate neutron star solutions in scalar-tensor theories of gravity with first-order derivative self-interactions in the action and in the matter coupling. We assess the rob…
The well-posedness of the Cauchy problem for self-interacting vector fields
Enrico Barausse, Miguel Bezares, Marco Crisostomi +1
We point out that the initial-value (Cauchy) problem for self-interacting vector fields presents the same well-posedness issues as for first-order derivative self-interacting scala…
New Horizons for Fundamental Physics with LISA
K. G. Arun, Enis Belgacem, Robert Benkel +138
The Laser Interferometer Space Antenna (LISA) has the potential to reveal wonders about the fundamental theory of nature at play in the extreme gravity regime, where the gravitatio…
Cosmology with the Laser Interferometer Space Antenna
Pierre Auclair, David Bacon, Tessa Baker +177
The Laser Interferometer Space Antenna (LISA) has two scientific objectives of cosmological focus: to probe the expansion rate of the universe, and to understand stochastic gravita…
No evidence of kinetic screening in simulations of merging binary neutron stars beyond general relativity
Miguel Bezares, Ricard Aguilera-Miret, Lotte ter Haar +3
We have conducted fully relativistic simulations in a class of scalar-tensor theories with derivative self-interactions and screening of local scales. By using high-resolution shoc…
Kinetic screening in nonlinear stellar oscillations and gravitational collapse
Miguel Bezares, Lotte ter Haar, Marco Crisostomi +2
We consider k-essence, a scalar-tensor theory with first-order derivative self-interactions that can screen local scales from scalar fifth forces, while allowing for sizeable devia…
Degenerate Horava gravity
Enrico Barausse, Marco Crisostomi, Stefano Liberati +1
Horava gravity breaks Lorentz symmetry by introducing a dynamical timelike scalar field (the khronon), which can be used as a preferred time coordinate (thus selecting a preferred…
Dynamics of Screening in Modified Gravity
Lotte ter Haar, Miguel Bezares, Marco Crisostomi +2
Gravitational theories differing from General Relativity may explain the accelerated expansion of the Universe without a cosmological constant. However, to pass local gravitational…
K-dynamics: well-posed 1+1 evolutions in K-essence
Miguel Bezares, Marco Crisostomi, Carlos Palenzuela +1
We study the vacuum Cauchy problem for K-essence, i.e. cosmologically relevant scalar-tensor theories that involve first-order derivative self-interactions, and which pass all exis…
Consistency relations for large-scale structure in modified gravity and the matter bispectrum
Marco Crisostomi, Matthew Lewandowski, Filippo Vernizzi
We study perturbation theory for large-scale structure in the most general scalar-tensor theories propagating a single scalar degree of freedom, which include Horndeski theories an…
Perturbations of a rotating black hole in DHOST theories
Christos Charmousis, Marco Crisostomi, David Langlois +1
We study linear perturbations of a rotating black hole solution that has been recently discovered in degenerate higher-order scalar-tensor (DHOST) theories. We find a parametrizati…
Testing modified gravity at cosmological distances with LISA standard sirens
E. Belgacem, G. Calcagni, M. Crisostomi +18
Modifications of General Relativity leave their imprint both on the cosmic expansion history through a non-trivial dark energy equation of state, and on the evolution of cosmologic…
Rotating Black Holes in Higher Order Gravity
Christos Charmousis, Marco Crisostomi, Ruth Gregory +1
We develop a new technique for finding black hole solutions in modified gravity that have "stealth" hair, i.e., hair whose only gravitational effect is to tune the cosmological con…
Vainshtein regime in Scalar-Tensor gravity: constraints on DHOST theories
Marco Crisostomi, Matthew Lewandowski, Filippo Vernizzi
We study the screening mechanism in the most general scalar-tensor theories that leave gravitational waves unaffected and are thus compatible with recent LIGO/Virgo observations. U…
Cosmological evolution in DHOST theories
Marco Crisostomi, Kazuya Koyama, David Langlois +2
In the context of Degenerate Higher-Order Scalar-Tensor (DHOST) theories, we study cosmological solutions and their stability properties. In particular, we explicitly illustrate th…