Gravitational radiations from periodic orbits around Einstein-Æther black holes
arXiv:2505.00294 · doi:10.1016/j.dark.2025.102141
Abstract
In this work, we investigate the gravitational wave emission from the periodic orbital motion of a test particle around two specific types of black holes in Einstein-Æther theory, a modified gravity that locally breaks Lorentz symmetry while remaining consistent with theoretical and observational constraints through a careful selection of its four coupling constants . Focusing on the impact of the æther field, we examine the properties of periodic orbits, which are characterized by a set of three topological integers that uniquely classify their trajectories. We then calculate the gravitational waveforms generated by these periodic orbits, identifying potential observational signatures. Our analysis reveals a direct connection between the zoom-whirl orbital behavior of the small compact object and the gravitational waveforms it emits: higher zoom numbers lead to increasingly intricate waveform substructures. Moreover, the presence of the æther field introduces significant modifications to these waveforms, imprinting measurable deviations that could be potentially tested or constrained by future space-based gravitational wave detectors.
arXiv comment13 pages, 6 figures. Version published in PDU
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