Results 61 to 70 of about 4,188,611 (364)

Growth factor and galaxy bias from future redshift surveys: a study on parametrizations [PDF]

open access: yes, 2011
Many experiments in the near future will test dark energy through its effects on the linear growth of matter perturbations. In this paper, we discuss the constraints that future large-scale redshift surveys can put on three different parametrizations of ...
C. D. Porto, L. Amendola, E. Branchini
semanticscholar   +1 more source

Optimized Photometric Redshifts for the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS)

open access: yesThe Astrophysical Journal, 2023
We present the first comprehensive release of photometric redshifts (photo - z 's) from the Cosmic Assembly Near-Infrared Deep Extragalactic Legacy Survey (CANDELS) team.
Dritan Kodra   +29 more
doaj   +1 more source

The density and peculiar velocity fields of nearby galaxies [PDF]

open access: yes, 1995
We review the quantitative science that can be and has been done with redshift and peculiar velocity surveys of galaxies in the nearby universe. After a brief background setting the cosmological context for this work, the first part of this review ...
Aaronson   +643 more
core   +2 more sources

The DEEP2 Redshift Survey

open access: yes, 2006
The DEIMOS spectrograph is nearing completion in the UC Lick shops and will be delivered to the Keck Observatory in 2001. Once it is operational, a team of astronomers will initiate DEEP2, a major redshift survey of galaxies that will consume approximately 120 nights at the Keck Observatory over a three year period.
Sandra M. Faber   +3 more
openaire   +3 more sources

JEMS: A Deep Medium-band Imaging Survey in the Hubble Ultra Deep Field with JWST NIRCam and NIRISS

open access: yesThe Astrophysical Journal Supplement Series, 2023
We present JWST Extragalactic Medium-band Survey, the first public medium-band imaging survey carried out using JWST/NIRCam and NIRISS. These observations use ∼2 and ∼4 μ m medium-band filters (NIRCam F182M, F210M, F430M, F460M, F480M; and NIRISS F430M ...
Christina C. Williams   +34 more
doaj   +1 more source

Combining weak-lensing tomography and spectroscopic redshift surveys [PDF]

open access: yes, 2011
Redshift space distortion (RSD) is a powerful way of measuring the growth of structure and testing General Relativity, but it is limited by cosmic variance and the degeneracy between galaxy bias b and the growth rate factor f.
Yan-Chuan Cai, G. Bernstein
semanticscholar   +1 more source

The Center for Astrophysics Redshift Survey [PDF]

open access: yesSymposium - International Astronomical Union, 1983
We have completed the survey of radial velocities for all 2400 galaxies brighter than 14.5 at high galactic latitude in the northern hemisphere. This data set has already been used to derive a good measure of the local mean mass density, describe the overdensity and the dynamics of the local supercluster and to analyse the dynamics of groups and ...
M. Davis   +2 more
openaire   +2 more sources

Measuring the cosmological constant with redshift surveys [PDF]

open access: yes, 1996
It has been proposed that the cosmological constant $\Lambda$ might be measured from geometric effects on large-scale structure. A positive vacuum density leads to correlation-function contours which are squashed in the radial direction when calculated ...
Ballinger, W. E.   +2 more
core   +3 more sources

A NEW METHOD FOR THE DETERMINATION OF THE GROWTH RATE FROM GALAXY REDSHIFT SURVEYS [PDF]

open access: yes, 2011
Given a redshift survey of galaxies with measurements of apparent magnitudes, we present a novel method for measuring the growth rate f(Ω) of cosmological linear perturbations.
A. Nusser, E. Branchini, M. Davis
semanticscholar   +1 more source

The Inverse Redshift-Space Operator: Reconstructing Cosmological Density and Velocity Fields [PDF]

open access: yes, 1999
We present the linear inverse redshift space operator which maps the galaxy density field derived from redshift surveys from redshift space to real space. Expressions are presented for observers in both the CMBR and Local Group rest frames.
Andy Taylor   +32 more
core   +2 more sources

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