6 citations · 6 across the 9 of their papers we have counts for
10 papers
Testing Refracted Gravity with the kinematics of stacked galaxy clusters
Dario Primignani, Lorenzo Pizzuti, Antonaldo Diaferio +1
We test Refracted Gravity (RG), a phenomenological modified gravity model that modifies the Poisson equation by introducing an effective gravitational permittivity …
Exploring the dark sector through galaxy dynamics in clusters
Andrea Biviano, Lorenzo Pizzuti, Antonaldo Diaferio
Galaxy clusters are among the most powerful laboratories to probe fundamental physics, from the formation of cosmic structures to the nature of dark matter, dark energy, and gravit…
Searching for signatures of self-interacting dark matter in halos from full physics simulations: From 3D structure to projected observables
Giovanni Y. Ferron, Antonio Ragagnin, Lorenzo Pizzuti +1
In this work we explore the imprints of self-interacting dark matter (SIDM) on the structure of simulated galaxy groups and clusters in view of future optical surveys. We find that…
Teukolsky by Design: A Hybrid Spectral-PINN solver for Kerr Quasinormal Modes
Alexandre M. Pombo, Lorenzo Pizzuti
We introduce SpectralPINN, a hybrid pseudo-spectral/physics-informed neural network (PINN) solver for Kerr quasinormal modes that targets the Teukolsky equation in both the separat…
-balls, neural networks and galaxy rotation curves
Alexandre M. Pombo, Lorenzo Pizzuti, Alessandra di Giacomo
Can a dynamically robust (\textit{aka} stable) -ball reproduce the rotation curve of a disk galaxy? In an astrophysical environment, -balls are non-topological solitons that…
Modified gravity in galaxy clusters: Joint analysis of Hydrostatics and Caustics
Minahil Adil Butt, Sandeep Haridasu, Yacer Boumechta +4
We present a comprehensive joint analysis of two distinct methodologies for measuring the mass of galaxy clusters: hydrostatic measurements and caustic techniques. We show that by…
The shape of the Chameleon fifth-force on the mass components of galaxy clusters
Lorenzo Pizzuti, Valentina Amatori, Alexandre M. Pombo +1
In the context of Chameleon gravity, we present a semi-analytical solution of the chameleon field profile in accurately modelled galaxy cluster's mass components, namely: the stell…
Mass Modeling and Kinematics of Galaxy Clusters in Modified Gravity
Lorenzo Pizzuti, Yacer Boumechta, Sandeep Haridasu +6
The chameleon screening mechanism has been constrained many a time using dynamic and kinematic galaxy cluster observables. Current constraints are, however, insensitive to differen…
Virial identities across the spacetime
Alexandre M. Pombo, Lorenzo Pizzuti
Virial-like identities obtained through Derrick's scaling argument are powerful, multi-purpose tools to study general relativistic models. Applications comprise establishing no-go/…
The spooky ghost of vectorization
Lorenzo Pizzuti, Alexandre M. Pombo
An interesting mechanism for the formation of hairy black holes occurs when a vector field, non-minimally coupled to a source term, grows from a perturbation of the vacuum black ho…