2022 Fiscal Year Annual Research Report
Modeling of extreme mass ratio inspiral for testing gravity theories
| Project/Area Number |
21J15826
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| Research Institution | Kyoto University |
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Principal Investigator |
Gupta Priti 京都大学, 理学研究科, 特別研究員(DC2)
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| Project Period (FY) |
2021-04-28 – 2023-03-31
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| Keywords | EMRIS / Gravitational waves / Resonances / Tidal force |
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| Outline of Annual Research Achievements |
The research project was focused on tidal resonances encountered by extreme-mass-ratio inspirals. Extreme mass ratio inspirals are one of the most exciting and promising target sources for space-based interferometers (such as LISA) that will offer stringent tests on the general theory of relativity. They might also provide a wealth of information about the dense environment in galactic centers via the emission of gravitational waves. Our work (already published) in the fiscal year 2022 is an extension of the work published in 2021. Now, we have relaxed previous assumptions and prepared a realistic model. We extensively explore a more generic model for the tidal perturber with additional resonance combinations, to study the dependence of resonance strength on the intrinsic orbital and tidal parameters. To analyze the resonant signals, accurate templates that correctly incorporate the effects of the tidal field are required. The evolution through resonances is obtained using a step function, whose amplitude is calculated using an analytic interpolation of the resonance jumps. We benchmark this procedure by comparing our approximate method to a numerical evolution. Further, we use Fisher matrices to study both the measurement precision of parameters and the systematic bias due to inaccurate modeling. Modeling of self-force resonances can also be carried out using the implementation presented in this study, which will be crucial for EMRI waveform modeling.
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| Research Progress Status |
令和4年度が最終年度であるため、記入しない。
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| Strategy for Future Research Activity |
令和4年度が最終年度であるため、記入しない。
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Research Products
(3 results)
