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We examine observational consequences of the cosmological light-cone effecton the power spectrum of the distribution of galaxies and quasars from upcomingredshift surveys. First we derive an expression for the power spectrum ofcosmological objects in real space on a light cone, $P^{\rm LC}_{\rmR,lin}(k)$, which is exact in linear theory of density perturbations. Next weincorporate corrections for the nonlinear density evolution and redshift-spacedistortion in the formula in a phenomenological manner which is consistent withrecent numerical simulations. On the basis of this formula, we predict thepower spectrum of galaxies and quasars on the light cone for future redshiftsurveys taking account of the selection function properly. We demonstrate thatthis formula provides a reliable and useful method to compute the powerspectrum on the light cone given an evolution model of bias.Comment: 18 pages, 3 figures, to be published in the Astrophysical Journa

The Cosmological Light‐Cone Effect on the Power Spectrum of Galaxies and Quasars in Wide‐Field Redshift Surveys