Nonlinear Cosmological probes of gravity theories beyond General Relativity

Speaker and affiliation: 
David F. Mota (Institute of Theoretical Astrophysics, University of Oslo)
Tue, 2023-03-28 12:30 to 13:30
ul. Pasteura 7, sala 404 /

Several modifications to general relativity have been proposed with the aim to explain the nature of dark energy and the accelerated expansion of the Universe. In this talk I will review the present status of modified theories of gravity in the light of astrophysical probes of gravity in the weak-field regime, ranging from stars to cosmological scales.  I begin by setting the scene for how theories beyond General Relativity are expected to behave in the different astrophysical systems, as well as their cosmological signatures. With these in hand, I present a range of observational tests with an eye to using the current and next generation of observations for tests of gravity. In particular, I will show how physical observables of the non-linear regime of structure formation are promising probes to constraining theoretical models in the nonlinear dynamics of stars, galaxies, clusters and large scale structure.


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