Gravitational waves from equatorially eccentric extreme mass ratio inspirals around swirling Kerr black holes

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Summary

This study investigates the effects of a swirling universe background on extreme mass ratio inspirals (EMRIs) around a Kerr black hole. The researchers found that the swirling parameter j causes a phase delay in the gravitational waveforms, while the black hole spin parameter a suppresses the impact of j on the EMRI gravitational waves.

Highlights

• The swirling-Kerr black hole has an extra swirling parameter j that characterizes the rotation of the universe background.
• The swirling parameter j enhances the orbital differences between the swirling-Kerr black hole spacetime and the corresponding Kerr black hole spacetime.
• The effects of the swirling parameter j are opposite to those of the black hole spin parameter a.
• The presence of the swirling parameter j results in a phase delay in the gravitational waveforms.
• The black hole spin parameter a suppresses the impact of the swirling parameter j on the EMRI gravitational waves.
• The researchers analyzed the confusion problem of gravitational waves in the swirling-Kerr black hole spacetime.
• The study provides further insight into the properties of EMRI gravitational waves and the swirling of the universe background.

Key Insights

• The swirling parameter j has a significant impact on the orbital motion of EMRIs around a Kerr black hole, causing a phase delay in the gravitational waveforms.
• The black hole spin parameter a plays a crucial role in suppressing the effects of the swirling parameter j on the EMRI gravitational waves.
• The swirling-Kerr black hole spacetime has distinct properties compared to the corresponding Kerr black hole spacetime, which can be used to identify the swirling of the universe background.
• The researchers employed the numerical Kludge scheme to study the EMRI gravitational waves in the swirling-Kerr black hole spacetime.
• The study highlights the importance of considering the swirling universe background in the analysis of EMRI gravitational waves.
• The results of this study have implications for the detection of EMRI gravitational waves by space-based detectors such as LISA.
• The swirling parameter j can be used as a probe to test the nature of the universe background and the properties of black holes.

Mindmap

Citation

Gu, Y., Chen, S., & Jing, J. (2024). Gravitational waves from equatorially eccentric extreme mass ratio inspirals around swirling Kerr black holes (Version 1). arXiv. https://doi.org/10.48550/ARXIV.2412.18854