Polarization map of the CMB + galactic foregrounds at 140 GHz
Credit: Susanna Azzoni (Oxford)

Cosmology seminar: Black hole binaries in higher derivative scalar-tensor theories of gravity

29Nov
Seminars and colloquia
Time
-
Venue
Beecroft Seminar Room
Denys Wilkinson Building, Department of Physics, University of Oxford, Keble Road, Oxford OX1 3RH
Speaker(s)

Pau Figueras (Queen Mary University of London)

Seminar series
Cosmology
Knowledge of physics?
Yes, knowledge of physics required

Abstract:

 In this talk I will present some work on black hole binary simulations in higher derivative theories of gravity. We shall consider Horndeski theories and the most general scalar tensor theory of gravity up to four derivatives of the fields. Contrary to the majority of the previous work, we shall treat these theories fully non-linearly. I will discus the challenges in doing so and I will present a new  formulation which is well-posed in the regime of validity of effective field theory. Treating these theories fully non-linearly is crucial to capture their unique non-perturbative physics and compute, from first principles, waveforms that can distinguish these theories from general relativity in gravitational wave observations in present and future detectors.