Inverse-Chirp Imprint of Gravitational Wave Signals in Scalar Tensor Theory

TL;DR

This paper investigates how scalar tensor theories influence gravitational wave signals during supernova core collapse, revealing a generic inverse-chirp feature that could help distinguish these theories from general relativity.

Contribution

It demonstrates the presence of an inverse-chirp feature in gravitational waves within scalar tensor theories through simulations, highlighting a potential observational signature.

Findings

Inverse-chirp feature observed in simulated gravitational waves

The feature is generic across different coupling functions

Potential for gravitational wave observations to test scalar tensor theories

Abstract

The scalar tensor theory contains a coupling function connecting the quantities in the Jordan and Einstein frames, which is constrained to guarantee a transformation rule between frames. We simulate the supernovae core collapse with different choices of coupling functions defined over the viable region of the parameter space and find that a generic inverse-chirp feature of the gravitational waves in the scalar tensor scenario.