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- W2088895432 abstract "We perform an all-sky analysis of the general relativistic galaxy power spectrum using the well-developed spherical Fourier decomposition. Spherical Fourier analysis expresses the observed galaxy fluctuation in terms of the spherical harmonics and spherical Bessel functions that are angular and radial eigenfunctions of the Helmholtz equation, providing a natural orthogonal basis for all-sky analysis of the large-scale mode measurements. Accounting for all the relativistic effects in galaxy clustering, we compute the spherical power spectrum and its covariance matrix and compare it to the standard three-dimensional power spectrum to establish a connection. The spherical power spectrum recovers the three-dimensional power spectrum at each wave number $k$ with its angular dependence ${ensuremath{mu}}_{k}$ encoded in angular multipole $l$, and the contributions of the line-of-sight projection to galaxy clustering such as the gravitational lensing effect can be readily accommodated in the spherical Fourier analysis. A complete list of formulas for computing the relativistic spherical galaxy power spectrum is also presented." @default.
- W2088895432 created "2016-06-24" @default.
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- W2088895432 date "2013-07-01" @default.
- W2088895432 modified "2023-09-30" @default.
- W2088895432 title "All-sky analysis of the general relativistic galaxy power spectrum" @default.
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- W2088895432 doi "https://doi.org/10.1103/physrevd.88.023502" @default.
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