Scalar Radiation with a Quartic Galileon

Understand

The class of Galileon scalar fields theories encapsulate the Vainshtein screening mechanism which is characteristic of a large range of infrared modified theories of gravity.

• Such theories can lead to testable departures from General Relativity through fifth forces and new scalar modes of gravitational radiation.
• However, the inherent non-linearity of the Vainshtein mechanism has limited analytic attempts to describe Galileon theories with both cubic and quartic interactions.
• To improve on this, we perform direct numerical simulations of the quartic Galileon model for a rotating binary source and infer the power spectrum of given multipoles.