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- W2893951913 abstract "Gravitational waves emitted from compact binary coalescence can be subject to wave diffraction if they are gravitationally lensed by an intervening mass clump whose Schwarzschild timescale matches the wave period. Waves in the ground-based frequency band $fsim 10$--$10^3,$Hz are sensitive to clumps with masses $M_E sim 10^2$--$10^3,M_odot$ enclosed within the impact parameter. These can be the central parts of low mass $M_L sim 10^3$--$10^6,M_odot$ dark matter halos, which are predicted in Cold Dark Matter scenarios but are challenging to observe. Neglecting finely-tuned impact parameters, we focus on lenses aligned generally on the Einstein scale for which multiple lensed images may not form in the case of an extended lens. In this case, diffraction induces amplitude and phase modulations whose sizes $sim 10%$--$20%$ are small enough so that standard matched filtering with unlensed waveforms do not degrade, but are still detectable for events with high signal-to-noise ratio. We develop and test an agnostic detection method based on dynamic programming, which does not require a detailed model of the lensed waveforms. For pseudo-Jaffe lenses aligned up to the Einstein radius, we demonstrate that a pair of fully upgraded aLIGO/Virgo detectors can extract diffraction imprints from binary black hole mergers out to $z_s sim 0.2$--$0.3$. The prospect will improve dramatically for a third-generation detector for which binary black hole mergers out to $z_s sim 2$--$4$ will all become valuable sources." @default.
- W2893951913 created "2018-10-05" @default.
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- W2893951913 date "2018-11-19" @default.
- W2893951913 modified "2023-10-18" @default.
- W2893951913 title "Detecting lensing-induced diffraction in astrophysical gravitational waves" @default.
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- W2893951913 doi "https://doi.org/10.1103/physrevd.98.104029" @default.
- W2893951913 hasPublicationYear "2018" @default.
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