Probing anisotropies of gravitational-wave backgrounds with a space-based interferometer III: Reconstruction of a high-frequency skymap

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dc.creatorTaruya, Atsushi
dc.date2006-07-20
dc.date.accessioned2026-07-07T10:24:23Z
dc.date.available2026-07-07T10:24:23Z
dc.descriptionWe develop a numerical scheme to make a high-frequency skymap of gravitational-wave backgrounds (GWBs) observed via space-based interferometer. Based on the cross-correlation technique, the intensity distribution of anisotropic GWB can be directly reconstructed from the time-ordered data of cross-correlation signals, with full knowledge of detector's antenna pattern functions. We demonstrate how the planned space interferometer, LISA, can make a skymap of GWB for a specific example of anisotropic signals. At the frequency higher than the characteristic frequency $f_*=1/(2πL)$, where $L$ is the arm-length of the detector, the reconstructed skymap free from the instrumental noise potentially reaches the angular resolution up to the multipoles $\ell\sim10$. The presence of instrumental noises degrades the angular resolution. The resultant skymap has angular resolution with multipoles $\ell\leq 6\sim7$ for the anisotropic signals with signal-to-noise ratio S/N$>5$.
dc.description15 pages, 10 figures, A version with high-resolution figures is available at http://www-utap.phys.s.u-tokyo.ac.jp/~ataruya/paper/ms_skymap3.pdf
dc.identifierhttps://arxiv.org/abs/gr-qc/0607080
dc.identifierhttp://arxiv.org/abs/gr-qc/0607080
dc.identifierPhys.Rev.D74:104022,2006
dc.identifierdoi:10.1103/PhysRevD.74.104022
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/176167
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectAstrophysics
dc.titleProbing anisotropies of gravitational-wave backgrounds with a space-based interferometer III: Reconstruction of a high-frequency skymap
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