Black hole simulations in axidilaton gravity

As we continue into the new age of gravitational wave astronomy, scientists continue to search for experimental signatures to test Einstein's theory of general relativity. One such signature arises from modified theories of gravity in which a scalar field couples to gravity and violates so-called no-hair theorems via the formation of scalar hair. In this talk, I will focus on axidilaton gravity in which two scalar fields, referred to the axion and dilaton, couple to curvature invariants and to each other. In fact, axidilaton gravity gives a generalization of two popular models of modified gravity known as dynamical Chern-Simons gravity and Einstein-dilaton-Gauss-Bonnet gravity. In this talk, I will present numerical simulations of black holes in axidilaton gravity to consider the growth and formation of axion and dilaton hair. From these simulations, I will explore how the coupling between the two fields affects the structure and stability of the final axion and dilaton hair solutions.