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Sayantani Datta

As seen in: Physical Review B
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Articles

Tests of general relativity at the fourth post-Newtonian order

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By Poulami Dutta Roy, Tamil Nadu, Sayantani Datta
| Physical Review B
The recently computed post-Newtonian (PN) gravitational-wave phasing up to 4.5PN order accounts for several novel physical effects in compact binary dynamics such as the tail of the memory, tails of tails of tails, and tails of mass hexadecapole and current octupole moments.
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Multiparameter tests of general relativity using a principle component analysis with next-generation gravitational-wave detectors

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By Sayantani Datta, M. D Saleem
| Physical Review B
Principal component analysis (PCA) is an efficient tool to optimize multiparameter tests of general relativity (GR), wherein one looks for simultaneous deviations in multiple post-Newtonian phasing coefficients. This is accomplished by introducing non-GR deformation parameters in the phase evolution of the gravitational-wave templates used in the analysis. A PCA is performed to construct the “best-measured” linear combinations of the deformation parameters.
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