Journée des groupes de travail "Formes d'onde" et “Tests de la relativité générale et théories alternatives” du GdR Ondes Gravitationnelles

Contribution List

1. TBA

Carlo Heissenberg (IPhT, CEA Saclay)

6/3/25, 10:30 AM

2. TBA

Jibril Ben Achour (ENS Lyon)

6/3/25, 2:00 PM

3. TBA

Christopher Aykroyd (LTE, Observatoire de Paris)

6/3/25, 4:30 PM

4. Innermost stable circular orbit of compact binaries at the fourth post-Newtonian order

Etienne Ligout (APC)

6/3/25, 5:15 PM

We compute by means of post-Newtonian (PN) methods the innermost stable circular orbit (ISCO) of compact binaries. Two methods are used, with equivalent results: one based on the equations of motion in harmonic coordinates and one on the Hamiltonian formalism in ADM coordinates. The ISCO is deduced from an invariant stability criterion, extending the 3PN criterion of Blanchet and Iyer (2003)...