Séminaire / Seminar GReCO |
| « Tidal effects in eccentric compact binaries » |
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Quentin Henry |
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The recent release of the gravitational-wave (GW) transient catalog
GWTC-4.0 by the LVK Collaboration reports more than 200 compact-binary coalescence events, among which 7–9 systems contain at least one neutron star. Unlike black holes, neutron stars experience tidal interactions that leave measurable imprints on the GW signal, allowing us to probe their equation of state. The inspiral of comparable-mass compact binaries is accurately described within the post-Newtonian (PN) approximation, which provides the analytical input for waveform models employed in matched-filtering searches and parameter estimation. Thus far, PN results including tidal contributions to the gravitational waveform have been provided only for quasi-circular binaries. In this talk, I will present the recent derivation of gravitational waveforms emitted by tidally interacting compact binaries on eccentric orbits in the PN framework. These results are ready for implementation in waveform models. I will discuss the impact of eccentricity–tidal couplings on the phasing and their potential measurability with current ground-based detectors. In particular, I will discuss the GW200105 event, interpreted as a neutron star–black hole merger, which entered the LIGO–Virgo sensitivity band with a residual orbital eccentricity of approximately 0.13. |
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lundi 16 février 2026 - 11:00 Salle des séminaires Évry Schatzman Institut d'Astrophysique de Paris |
| Pages web du séminaire / Seminar's webpage |