Can gravitational-wave memory help constrain binary black-hole parameters A LISA case study
Gasparotto, Silvia (Institut de Física d'Altes Energies)
Vicente, Rodrigo (Institut de Física d'Altes Energies)
Blas Temiño, Diego (Universitat Autònoma de Barcelona. Departament de Física)
Jenkins, Alexander (University College London. Department of Physics and Astronomy)
Barausse, Enrico (Scuola Internazionale Superiore di Studi Avanzati (Trieste))

Data:	2023
Resum:	Besides the transient effect, the passage of a gravitational wave also causes a persistent displacement in the relative position of an interferometer's test masses through the nonlinear memory effect. This effect is generated by the gravitational backreaction of the waves themselves, and encodes additional information about the source. In this work, we explore the implications of using this information for the parameter estimation of massive binary black holes with LISA. Based on a Fisher analysis for nonprecessing black hole binaries, our results show that the memory can help to reduce the degeneracy between the luminosity distance and the inclination for binaries observed only for a short time (∼few hours) before merger. To assess how many such short signals will be detected, we utilized state-of-the-art predictions for the population of massive black hole binaries and models for the gaps expected in the LISA data. We forecast from tens to few hundreds of binaries with observable memory, but only ∼O(0. 1) events in 4 years for which the memory helps to reduce the degeneracy between distance and inclination. Based on this, we conclude that the new information from the nonlinear memory, while promising for testing general relativity in the strong field regime, has probably a limited impact on further constraining the uncertainty on massive black hole binary parameters with LISA.
Ajuts:	European Commission 815673 European Commission 101007855 Agencia Estatal de Investigación FJC2021-046551-I Agencia Estatal de Investigación PID2020-115845GB-I00 Ministerio de Ciencia e Innovación BG20/00228
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Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	General relativity ; Gravitational waves
Publicat a:	Physical Review D, Vol. 107, issue 12 (June 2023) , art. 124033, ISSN 2470-0029

DOI: 10.1103/PhysRevD.107.124033

20 p, 1.3 MB

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