重力波の重力レンズII : lensed waves from BH-BH merging(重力レンズ現象とHigh-Redshift宇宙,研究会報告)

概要

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We calculate numerically the waveform of gravitational waves from super-massive black hole coalescence in case it be lensed by an intervening galaxy, taking correctly the diffraction effect into account. The waveform detected by LISA (AD2014) [1] will look like Figure 1 for the four lensing configurations shown in Figure 2. The beat of gravitational waves should be observable, if the event rate (which is highly uncertain) is sufficiently large. [figure] Figure 1: Amplitude of gravitational waves observed by LISA, from M=10^6M_<⊙> black hole binary at z_s=2, lensed by υ=100km/s lensing galaxy at z_d= 0.5, for the four configurations in Fig.2. Dotted, dashed and solid curves are, respectively, the unlensed waveforms, the waveforms in quasi-classical approximation of eq.(4) and the full waveforms taking the diffraction effect into account. H_0=70km/s/Mpc.
素粒子論グループ素粒子研究編集部の論文
1998-10-20