Statistical inference approach to time-delay interferometry for gravitational-wave detection
| Autor: | John G. Baker, Jacob Slutsky, Quentin Baghi, James Ira Thorpe |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Physics
Gravitational-wave observatory 010308 nuclear & particles physics Gravitational wave Astrophysics::Instrumentation and Methods for Astrophysics FOS: Physical sciences General Relativity and Quantum Cosmology (gr-qc) Covariance 01 natural sciences General Relativity and Quantum Cosmology Interferometry Noise symbols.namesake Gaussian noise Frequency domain 0103 physical sciences Astronomical interferometer symbols Astrophysics - Instrumentation and Methods for Astrophysics 010306 general physics Instrumentation and Methods for Astrophysics (astro-ph.IM) Algorithm |
| Zdroj: | Physical Review D. 103 |
| ISSN: | 2470-0029 2470-0010 |
| DOI: | 10.1103/physrevd.103.042006 |
| Popis: | The future space-based gravitational wave observatory LISA will consist of a constellation of three spacecraft in a triangular constellation, connected by laser interferometers with 2.5 million-kilometer arms. Among other challenges, the success of the mission strongly depends on the quality of the cancellation of laser frequency noise, whose power lies eight orders of magnitude above the gravitational signal. The standard technique to perform noise removal is time-delay interferometry (TDI). TDI constructs linear combinations of delayed phasemeter measurements tailored to cancel laser noise terms. Previous work has demonstrated the relationship between TDI and principal component analysis (PCA). We build on this idea to develop an extension of TDI based on a model likelihood that directly depends on the phasemeter measurements. Assuming stationary Gaussian noise, we decompose the measurement covariance using PCA in the frequency domain. We obtain a comprehensive and compact framework that we call PCI for "principal component interferometry," and show that it provides an optimal description of the LISA data analysis problem. More realistic gravitational-wave source used as a case study. Figures 3-7 modified. Rationale and conclusions unchanged |
| Databáze: | OpenAIRE |
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