GW170817, the milestone gravitational-wave event originated from a binary neutron star merger, has allowed scientific community to place a constraint on the equation of state of neutron stars by extracting the leading-order, tidal-deformability term from the gravitational waveform. Here we incorporate tidal corrections to the gravitational-wave phase at next-to-leading and next-to-next-to-leading order, including the magnetic tidal Love numbers, tail effects, and the spin-tidal couplings recently computed in Tiziano Abdelsalhin [Phys. Rev. D 98, 104046 (2018)]. These effects have not yet been included in the waveform approximants for the analysis of GW170817. We provide a qualitative and quantitative analysis of the impact of these new terms by studying the parameter bias induced on events compatible with GW170817 assuming second-generation (advanced LIGO) and third-generation (Einstein Telescope) ground-based gravitational-wave interferometers. We find that including the tidal-tail term deteriorates the convergence properties of the post-Newtonian expansion in the relevant frequency range. We also find that the effect of magnetic tidal Love numbers could be measurable for an optimal GW170817 event with signal-to-noise ratio ≈1750 detected with the Einstein Telescope. On the same line, spin-tidal couplings may be relevant if mildly high-spin χ0.1 neutron star binaries exist in nature.
Impact of high-order tidal terms on binary neutron-star waveforms / Jiménez Forteza, Xisco; Abdelsalhin, Tiziano; Pani, Paolo; Gualtieri, Leonardo. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 98:12(2018).
|Titolo:||Impact of high-order tidal terms on binary neutron-star waveforms|
|Data di pubblicazione:||2018|
|Citazione:||Impact of high-order tidal terms on binary neutron-star waveforms / Jiménez Forteza, Xisco; Abdelsalhin, Tiziano; Pani, Paolo; Gualtieri, Leonardo. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 98:12(2018).|
|Appartiene alla tipologia:||01a Articolo in rivista|