Towards Tests of Alternative Theories of Gravity with LISA
Carlos F. Sopuerta (ICE, CSIC-IEEC), Nicolas Yunes (Princeton)
TL;DR
This paper explores how alternative theories of gravity, specifically Chern-Simons modified gravity, could influence gravitational wave signals from EMRIs and IMRIs detectable by LISA, aiding tests of fundamental physics.
Contribution
It analyzes the impact of Chern-Simons gravity on gravitational wave signals from EMRIs and IMRIs, proposing a method to test this theory with LISA data.
Findings
Chern-Simons gravity alters gravitational wave signatures.
Detectability of modifications depends on system parameters.
Potential to constrain alternative gravity theories with LISA.
Abstract
The inspiral of stellar compact objects into massive black holes, usually known as extreme-mass-ratio inspirals (EMRIs), is one of the most important sources of gravitational-waves for the future Laser Interferometer Space Antenna (LISA). Intermediate-mass-ratio inspirals (IMRIs are also of interest to advance ground-based gravitational-wave observatories. We discuss here how modifications to the gravitational interaction can affect the signals emitted by these systems and their detectability by LISA. We concentrate in particular on Chern-Simons modified gravity, a theory that emerges in different quantum gravitational approaches.
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