Constraints on Galaxy Bias, Matter Density, and Primordial Non–Gausianity from the PSCz Galaxy Redshift Survey
نویسندگان
چکیده
Hume A. Feldman, Joshua A. Frieman, J. N. Fry, and Román Scoccimarro Department of Physics & Astronomy, University of Kansas, Lawrence KS 66045 [email protected] NASA/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, IL 60510 [email protected] Department of Astronomy and Astrophysics, University of Chicago, Chicago, IL 60637 Department of Physics, University of Florida, Gainesville FL 32611-8440 [email protected] Institute for Advanced Study, School of Natural Sciences, Einstein Drive, Princeton, NJ 08540 [email protected]
منابع مشابه
Constraints on galaxy bias, matter density, and primordial non-Gaussianity from the PSCz galaxy redshift survey.
We compute the bispectrum for the IRAS PSCz catalog and find that the galaxy distribution displays the characteristic signature of gravity. Assuming Gaussian initial conditions, we obtain galaxy biasing parameters 1/b(1) = 1.20(+0.18)(-0.19) and b(2)/b(2)(1) = -0.42+/-0.19, with no sign of scale-dependent bias for k < or = 0.3h Mpc(-1). These results impose stringent constraints on non-Gaussian...
متن کاملApplication of Data Compression Methods to the Redshift-space distortions of the PSCz galaxy catalogue
We apply a spherical harmonic analysis to the Point Source Redshift Survey (PSCz), to compute the real-space galaxy power spectrum and the degree of redshift distortion caused by peculiar velocities. We employ new parameter eigenvector and hierarchical data compression techniques, allowing a much larger number of harmonic modes to be included, and correspondingly smaller error bars. Using 4644 ...
متن کاملCan large-scale structure probe CMB-constrained non-Gaussianity?
The first year Wilkinson Microwave Anisotropy Probe (WMAP) set quantitative constraints on the amplitude of any primordial non-Gaussianity. We run a series of dark matter-only N-body simulations with the WMAP constraints to investigate the effect of the presence of primordial non-Gaussianity on large scale structures. The model parameters can be constrained using the observations of protocluste...
متن کاملReconstruction Analysis of the Iras Point Source Catalog Redshift Survey
We present the results of reconstruction analysis of the galaxy distribution in a spherical region of radius 50 h~1 Mpc centered on the Local Group, as mapped by the IRAS Point Source Catalog Redshift Survey (PSCz). We reconstruct this galaxy distribution using 15 di†erent models for structure formation in the universe, each model consisting of a set of assumptions regarding the value of the co...
متن کاملThe Real Space Power Spectrum of the PSCz Survey from 0 . 01 to 300 h Mpc − 1
We report a measurement of the real space (not redshift space) power spectrum of galaxies over four and a half decades of wavenumber, 0.01 to 300 hMpc, from the IRAS Point Source Catalog Redshift Survey (PSCz). Since estimates of power are highly correlated in the nonlinear regime, we also report results for the prewhitened power spectrum, which is less correlated. The inferred bias between opt...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2014