Speaker
Description
The relevance of compact objects to both astrophysics and theoretical physics is well-established, as the extreme compactness of these systems provide an optimal environment to probe the strong-field gravity regimes. Within this framework, boson stars are considered to be viable models for ultralight dark matter, as well as black hole mimickers. While scalar boson stars offer simple, self-gravitating solutions to the minimally coupled gravity-matter system, they may represent a conceptual simplification of the universe’s matter content. On the other hand, the study of self-gravitating spin-2 fields is particularly compelling, as modern theories of modified gravity, such as ghost-free massive gravity and bimetric theory, rely on these fields to provide a consistent description of massive gravitons. I present a novel field ansatz, based on the ghost-free dRGT massive gravity action , for a possible bound tensor configuration. This framework is characterised by non-trivial matter–curvature couplings, yielding highly nonlinear equations, which we aim at investigating by means of a Physics-Informed Neural Network (PINN). I discuss the viability of the model and the robustness of the ansatz compared to scalar and vector solutions.
| Parallel session | Gravitational Waves from Binary Systems |
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