20–23 May 2025
Palazzone della Scuola Normale Superiore di Pisa, Cortona
Europe/Rome timezone

Direct current memory effects in effective-one-body waveform models

20 May 2025, 15:10
15m
Palazzone della Scuola Normale Superiore di Pisa, Cortona

Palazzone della Scuola Normale Superiore di Pisa, Cortona

Speaker

Elisa Grilli (Istituto Nazionale di Fisica Nucleare)

Description

The direct current (DC) memory is a non-oscillatory, hereditary component of the gravitational wave (GW) signal that represents one of the most peculiar manifestations of the nonlinear nature of GW emission and propagation. In this work, by transforming the results provided in Ebersold et al.[Phys.Rev.D 100 (2019) 8, 084043] in harmonic coordinates and quasi-Keplerian parametrization, we provide the DC memory in terms of the effective-one-body (EOB) phase-space variables, with a relative accuracy of 2.5PN and in an expansion for small eccentricity up to order six. Our results are then implemented in TEOBResumS-Dalí, thus providing the first EOB model with DC memory contributions. This model is then used to assess the impact on the waveform and the main features of the DC memory, also addressing its dependence on the eccentricity of the binary system at its formation.

Primary authors

Andrea Placidi (University of Perugia) Elisa Grilli (Istituto Nazionale di Fisica Nucleare) Gianluca Grignani (Istituto Nazionale di Fisica Nucleare) Marta Orselli (Istituto Nazionale di Fisica Nucleare) Simone Albanesi (Friedrich-Schiller-Universität Jena)

Presentation materials