Parameterized Post-Einsteinian Gravitational Waveforms in Various Modified Theories of Gravity

Understand

Despite the tremendous success of general relativity so far, modified theories of gravity have received increased attention lately, motivated from both theoretical and observational aspects.

• Gravitational wave observations opened new possibilities for testing the viability of such theories in the strong-field regime.
• One could test each theory against observed data one at a time, though a more efficient approach would be to first probe gravity in a theory-agnostic way and map such information to that on specific theories afterward.
• One example of such model-independent tests with gravitational waves is the parameterized post-Einsteinian formalism, where one introduces generic parameters in the amplitude and phase that capture non-Einsteinian effects.