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Detecting accelerating eccentric binaries in the LISA band by Zeyuan Xuan; Smadar Naoz; Xian Chen is a Physics and Astronomy article available to read on EtoBox.

What is Detecting accelerating eccentric binaries in the LISA band about?

Many gravitational wave (GW) sources in the LISA band are expected to have non-negligible eccentricity. Furthermore, many of them can undergo acceleration because they reside in the presence of a tertiary. Here we develop analytical and numerical methods to quantify how the compact binary's eccentricity enhances the detection of its peculiar acceleration. We show that the general relativistic precession pattern can disentangle the binary's acceleration-induced frequency shift from the chirp-massinduced frequency shift in GW template fitting, thus relaxing the signal-to-noise ratio requirement for distinguishing the acceleration by a factor of 10 ∼ 100. Moreover, by adopting the GW templates of the accelerating eccentric compact binaries, we can enhance the acceleration measurement accuracy by a factor of ∼100, compared to the zero-eccentricity case, and detect the source's acceleration even if it does not change during the observational time. For example, a stellar-mass binary black hole (BBH) with moderate eccentricity in the LISA band yields an error of the acceleration measurement ∼10 -7 m • s -2 for SNR 1⁄4 20 and observational time of 4 yr. In this example, we can measure the

Who reads Detecting accelerating eccentric binaries in the LISA band?

Author

Zeyuan Xuan; Smadar Naoz; Xian Chen

Publisher

American Physical Society (APS)

Published

2023

Language

EN

Field

Physics and Astronomy (Physical Sciences)