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Innermost stable circular orbit (ISCO) of arbitrary-mass compact binaries with spins at the fourth post-Newtonian order
Luc Blanchet, David Langlois, Etienne Ligout
We compute, up to 4th post-Newtonian (4PN) order, the gauge-invariant stability criterion determining the innermost stable circular orbit (ISCO) for arbitrary-mass compact binaries…
Gravitational radiation reaction for compact binary systems at the fourth-and-a-half post-Newtonian order in harmonic coordinates
Luc Blanchet, Guillaume Faye, Emeric Seraille +1
We derive the gravitational radiation-reaction (RR) force in the harmonic coordinate system at the fourth-and-a-half post-Newtonian (4.5PN) order in the case of compact binary syst…
Innermost stable circular orbit of arbitrary-mass compact binaries at fourth post-Newtonian order
Luc Blanchet, David Langlois, Etienne Ligout
We compute by means of post-Newtonian (PN) methods the innermost stable circular orbit (ISCO) of arbitrary-mass (in particular, comparable-mass) compact binaries. Two methods are u…
Comparison of 4.5PN and 2SF gravitational energy fluxes from quasicircular compact binaries
Niels Warburton, Barry Wardell, David Trestini +6
Recent years have seen significant advances in models of gravitational waveforms emitted by quasicircular compact binaries in two regimes: the weak-field, post-Newtonian regime, in…
Testing regularity of black holes with X-rays and Gravitational Waves
Swarnim Shashank
Physically relevant solutions in general relativity often contain spacetime singularities, which are typically interpreted as a sign of breakdown of the theory at high densities/cu…
Uncovering stochastic gravitational-wave backgrounds with LISA
Quentin Baghi, Nikolaos Karnesis, Jean-Baptiste Bayle +2
Finding a stochastic gravitational-wave background (SGWB) of astrophysical or primordial origin is one of the quests of current and future gravitational-wave observatories. While d…
Gravitational-wave tails of memory at 4PN order
David Trestini, Luc Blanchet
We study a novel cubic nonlinear effect, the tails-of-memory, which consist of a combination of the tail effect (backscattering of linear gravitational waves against the curvature…
Tests of general relativity in the nonlinear regime: a parametrized plunge-merger-ringdown waveform model
Elisa Maggio
Gravitational waves provide a unique opportunity to test gravity in the dynamical and nonlinear regime. We present a parametrized test of general relativity (GR) that introduces ge…
Gravitational waves from compact binaries to the fourth post-Newtonian order
L. Blanchet, G. Faye, Q. Henry +2
The precise knowledge of the gravitational phase evolution of compact binaries is crucial to the data analysis for gravitational waves. Until recently, it was known analytically (f…