7 papers
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…
-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…
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…
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…
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…
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…