Results 71 to 80 of about 219,246 (225)
The Astrophysical Journal Supplement Series, 2023 Cosmology constraints serve as a crucial criterion in discriminating cosmological models. The traditional combined method to constrain the cosmological parameters designates the corresponding theoretical value and observational data as functions of ...
Wei Hong +4 more
doaj +1 more source
XMM-Newton Observations of High Redshift Quasars
, 2005 We report on our XMM observations of the high redshift quasars BR 2237--0607 (z=4.558) and BR 0351--1034 (z=4.351), together with 14 other z>4 objects found in the XMM public archive.
B. Wilkes +13 more
core +3 more sources
The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: mock galaxy catalogues for the low-redshift sample [PDF]
, 2014 We present one thousand mock galaxy catalogues for the analysis of the Low Redshift Sample (LOWZ, effective redshift z ~ 10.32) of the Baryon Oscillation Spectroscopic Survey Data Releases 10 and 11.
Brownstein, Joel R. +9 more
core +4 more sources
The Nonlinear Redshift Space Power Spectrum: Omega from Redshift Surveys
, 1995 We examine the anisotropies in the power spectrum by the mapping of real to redshift space. Using the Zel'dovich approximation, we obtain an analytic expression for the nonlinear redshift space power spectrum in the distant observer limit.
Fisher, K. B., Nusser, A.
core +1 more source
ANNz: estimating photometric redshifts using artificial neural networks [PDF]
, 2004 We introduce ANNz, a freely available software package for photometric redshift estimation using Artificial Neural Networks. ANNz learns the relation between photometry and redshift from an appropriate training set of galaxies for which the redshift is ...
Adrian A. Collister +4 more
core +3 more sources
Cosmology at low redshifts [PDF]
Astronomy & Astrophysics, 2003 PDF file 294KB Astronomy & Astrophysics 2003, In ...
openaire +4 more sources
Redshifted 21 Centimeter Signatures around the Highest Redshift Quasars [PDF]
The Astrophysical Journal, 2004 11 pages, 6 figures.
Wyithe, J. Stuart B., Loeb, Abraham
openaire +5 more sources
Forward Modeling of Galaxy Populations for Cosmological Redshift Distribution Inference
The Astrophysical Journal Supplement Series, 2023 We present a forward-modeling framework for estimating galaxy redshift distributions from photometric surveys. Our forward model is composed of: a detailed population model describing the intrinsic distribution of the physical characteristics of galaxies,
Justin Alsing +4 more
doaj +1 more source
The unrelaxed dynamical structure of the galaxy cluster Abell 85 [PDF]
, 2016 For the first time, we explore the dynamics of the central region of a galaxy cluster within $r_{500}\sim 600h^{-1}$~kpc from its center by combining optical and X-ray spectroscopy.
Aguerri, Jose Alfonso Lopez +4 more
core +3 more sources
Gravitational redshift and asymmetric redshift-space distortions for stacked clusters [PDF]
Monthly Notices of the Royal Astronomical Society, 2017 We derive the expression for the observed redshift in the weak field limit in the observer's past light cone, including all relativistic terms up to second order in velocity. We then apply it to compute the cluster-galaxy cross-correlation functions (CGCF) using N-body simulations.
Shaun Cole +4 more
openaire +5 more sources