Balázs Kacskovics\(^{1,2}\), Dániel Barta\(^{1}\) (2024.01.01 - 05.31)

\(^{1}\) HUN-REN Wigner Research Centre for Physics
\(^{2}\) Pécs University

Publication: Comparing eccentric waveform models based on post-Newtonian and effective-one-body approaches

Abstract: In the framework of this project, we compare two numerical models, namely CBWaves and SEOBNRE, which use the post-Newtonian and effective one-body approaches to model eccentric binaries. To explore the discrepancy between the two models, 260,000 simulations are performed on a grid stretched by the chosen parameter space - 20,000 for non-spinning configurations and 240,000 for spinning configurations. Each point on this grid, denoted by \(i\), is determined by the mass ratio \(\nu \equiv m_1/m_2\in [0.1,1]\), the gravitational mass \(m_i \in [10M_\odot, 100M_\odot]\), the corresponding spin magnitude \(S_i \in [0,0.6]\) and a constant initial orbital eccentricity \(e_{0}\). We will perform a comprehensive study to determine whether there is a discrepancy between the waveforms generated by the two codes.