THE 3-DIMENSIONAL POWER SPECTRUM MEASURED FROM THE APM GALAXY SURVEY .2. USE OF THE 2-DIMENSIONAL POWER SPECTRUM

被引:103
作者
BAUGH, CM
EFSTATHIOU, G
机构
[1] Department of Physics, Keble Road, Oxford
关键词
SURVEYS; GALAXIES; CLUSTERING; DARK MATTER; LARGE-SCALE STRUCTURE OF UNIVERSE;
D O I
10.1093/mnras/267.2.323
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present the results of a Fourier transform analysis of galaxies from the APM Survey in the magnitude range 17 less-than-or-equal-to b(J) less-than-or-equal-to 20. The two-dimensional power spectrum of galaxy clustering is found to obey a power law with K-1.33, displaying a break at K approximately 30, where K is the physical wavenumber on the plane of the sky and has units of inverse radians. We compare this with the power spectrum of the Lick Survey using a scaling relationship. We then recover the three-dimensional power spectrum from the two-dimensional power spectrum and reproduce results that we have previously obtained using the angular correlation function. The APM power spectrum in three dimensions is a power law, P(k) is-proportional-to k-1.25, for wavenumbers k greater-than-or-equal-to 0. 2 h Mpc-1. It rises above this power law in the range 0.08 h Mpc-1 less-than-or-equal-to k less-than-or-equal-to 0.2 h Mpc-1. At wavenumbers smaller than approximately 0.01 h Mpc-1, systematic and random errors dominate our estimates of the power spectrum.
引用
收藏
页码:323 / 332
页数:10
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