Résumé / Abstract Seminaire_GReCO
SÉMINAIRE DU GRECO

"Modeling and measuring tidal effects in coalescing neutron star binaries"

Alessandro Nagar
Inst. Hautes Etudes Scientifiques (IHES) (Bures-sur-Yvette, France)

Binary neutron star inspirals are among the most promising sources for the advanced version of the ground-based gravitational wave detector network LIGO-Virgo. The late-inspiral part of the GW signal is sensitive to tidal interaction between the two objects. The tidal signature is characterized by tidal polarizability coefficients (or tidal Love numbers), that only depend on the nuclear matter EOS. I'll report on recent work at the interface between analytical models of dynamics and waveform of the system (notably, based on the effective-one-body approach) and genereal-relativistic-hydrodynamics simulations, so to show that the analytical model is able to fully represent (within the numerical errors) the dynamics and waveforms of the system up to contact. Using then the effective-one-body analytical description of dynamics and waveforms, I'll then discuss the measurability of the tidal polarizability coefficients in advanced detectors using the late-inspiral part of the GW signal.

jeudi 10 mai 2012 - 14:00
Salle des séminaires François Arago ,
Institut d'Astrophysique de Paris

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