Results 81 to 90 of about 66,413 (243)
Overconstrained Dynamics in Galaxy Redshift Surveys [PDF]
The Astrophysical Journal, 2001 The least-action principle (LAP) method is used on four galaxy redshift surveys to measure the density parameter Omega_m and the matter and galaxy-galaxy power spectra. The datasets are PSCz, ORS, Mark III and SFI. The LAP method is applied on the surveys simultaneously, resulting in an overconstrained dynamical system that describes the cosmic ...
openaire +2 more sources
The 2dF QSO Redshift Survey- XV. Correlation analysis of redshift-space distortions [PDF]
Monthly Notices of the Royal Astronomical Society, 2005 Accepted for publication in MNRAS.
Angela, J +7 more
openaire +4 more sources
Spectroscopic Confirmation of a Massive Protocluster with Two Substructures at z ≃ 3.1
The Astrophysical JournalWe present the results of a Keck and Northern Extended Millimeter Array spectroscopic survey of 507 galaxies, where we confirm the presence of two massive overdensities at z = 3.090−3.110 and z = 3.133−3.155 in the neighborhood of the GOODS-N, each with ...
Michael J. Nicandro Rosenthal +5 more
doaj +1 more source
, 2003 We use weak lensing shear measurements of six z>0.5 clusters of galaxies to derive the mean lensing redshift of the background galaxies used to measure the shear. Five of these clusters are compared to X-ray mass models and verify a mean lensing redshift
Bartelmann +27 more
core +1 more source
Cosmological redshift distortion: deceleration, bias and density parameters from future redshift surveys of galaxies [PDF]
, 1997 The observed two-point correlation functions of galaxies in redshift space become anisotropic due to the geometry of the universe as well as due to the presence of the peculiar velocity field.
Ballinger W. E. +6 more
core +4 more sources
Photometric Redshift Estimation Using Scaled Ensemble Learning
The Astrophysical JournalThe development of the state-of-the-art telescopic systems capable of performing expansive sky surveys such as the Sloan Digital Sky Survey, Euclid, and the Rubin Observatory’s Legacy Survey of Space and Time (LSST) has significantly advanced efforts to ...
Swagata Biswas +7 more
doaj +1 more source
Cosmological Constraints with Clustering-Based Redshifts
, 2016 We demonstrate that observations lacking reliable redshift information, such as photometric and radio continuum surveys, can produce robust measurements of cosmological parameters when empowered by clustering-based redshift estimation. This method infers
Kovetz, Ely D. +2 more
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The Southern Sky Redshift Survey [PDF]
The Astrophysical Journal, 1988 The general characteristics of the space distribution of galaxies in the SSRS sample, covering the southern Galactic cap, are examined, and maps of the space distribution are presented. The sample consists of 2028 galaxies in an area of 1.75 sr with declination south of -17.5 deg and galactic latitude below -30 deg.
L. Nicolaci da Costa +8 more
openaire +1 more source
Photometric Redshift Forecast for the 7-Dimensional Sky Survey
The Astrophysical JournalWe investigate the expected accuracy of redshifts that can be obtained using low-resolution spectroscopic (medium-band) data from the 7-Dimensional Sky Survey (7DS). By leveraging 40 densely sampled filters with widths of FWHM = 25 nm, we create 7DS mock
Eunhee Ko +5 more
doaj +1 more source
WiggleZ Dark Energy Survey: Cosmological neutrino mass constraint from blue high-redshift galaxies [PDF]
, 2012 The absolute neutrino mass scale is currently unknown, but can be constrained by cosmology. The WiggleZ high redshift, star-forming, and blue galaxy sample offers a complementary data set to previous surveys for performing these measurements, with ...
Forster, Karl +3 more
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