Accurate emulator for the redshift-space power spectrum of dark matter halos and its application to galaxy power spectrum
نویسندگان
چکیده
منابع مشابه
Power Spectrum Analysis of the ESP Galaxy Redshift Survey
We measure the power spectrum of the galaxy distribution in the ESO Slice Project (ESP) galaxy redshift survey. We develope a technique to describe the survey window function analytically, and then deconvolve it from the measured power spectrum using a variant of the Lucy method. We test the whole deconvolution procedure on ESP mock catalogues drawn from large N–body simulations, and find that ...
متن کاملThe 2dF Galaxy Redshift Survey: The power spectrum and the matter content of the universe
The 2dF Galaxy Redshift Survey has now measured in excess of 160 000 galaxy redshifts. This paper presents the power spectrum of the galaxy distribution, calculated using a direct FFT-based technique. We argue that, within the k-space region 0.02 < ∼ k < ∼ 0.15 hMpc, the shape of this spectrum should be close to that of the linear density perturbations convolved with the window function of the ...
متن کاملMeasuring the Galaxy Power Spectrum with Future Redshift Surveys
Precision measurements of the galaxy power spectrum P (k) require a data analysis pipeline that is both fast enough to be computationally feasible and accurate enough to take full advantage of high-quality data. We present a rigorous discussion of different methods of power spectrum estimation, with emphasis on the traditional Fourier method, and linear (Karhunen-Loève; KL), and quadratic data ...
متن کاملThe Implications of the Large Scale Galaxy Power Spectrum for Cold Dark Matter
The APM Galaxy Survey maps the angular positions of more than one million galaxies to bJ = 20, covering a volume comparable to the forthcoming Sloan Digital Sky Survey. A numerical algorithm has been developed to estimate the power spectrum in three dimensions, using the angular clustering and a model for the redshift distribution of APM Galaxies. The power spectrum obtained is free from distor...
متن کاملSpherical Harmonic Analysis of the PSCz Galaxy Catalogue: Redshift distortions and the real–space power spectrum
We apply the formalism of spherical harmonic decomposition to the galaxy density field of the IRAS PSCz redshift survey. The PSCz redshift survey has almost all– sky coverage and includes IRAS galaxies to a flux limit of 0.6 Jy. Using maximum likelihood methods to examine (to first order) the distortion of the galaxy pattern due to redshift coordinates, we have measured the parameter β ≡ Ω/b. W...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 2020
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.102.063504