Results 11 to 20 of about 4,263,806 (339)
Constraints onOmega from the IRAS Redshift Surveys [PDF]
, 1994 We measure the anisotropy of the redshift-space power spectrum in the 1.2-Jy and QDOT redshift surveys of IRAS-selected galaxies. On large scales, this anisotropy is caused by coherent peculiar motions, and gravitational instability theory predicts a ...
Cole, Shaun +2 more
core +2 more sources
SHELS: Testing Weak Lensing Maps with Redshift Surveys [PDF]
, 2009 Weak lensing surveys are emerging as an important tool for the construction of "mass selected" clusters of galaxies. We evaluate both the efficiency and completeness of a weak lensing selection by combining a dense, complete redshift survey, the ...
Casertano +30 more
core +2 more sources
Topological Approach to Void Finding Applied to the SDSS Galaxy Map [PDF]
The Astrophysical JournalThe structure of the low redshift Universe is dominated by a multiscale void distribution delineated by filaments and walls of galaxies. The characteristics of voids, such as morphology, average density profile, and correlation function, can be used as ...
Manu Aggarwal +4 more
doaj +2 more sources
Cosmological inference from Bayesian forward modelling of deep galaxy redshift surveys [PDF]
Astronomy & Astrophysics, 2018 We present a large-scale Bayesian inference framework to constrain cosmological parameters using galaxy redshift surveys, via an application of the Alcock-Paczyński (AP) test.
D. K. Ramanah +3 more
semanticscholar +1 more source
Target Selection and Validation of DESI Quasars
The Astrophysical Journal, 2023 The Dark Energy Spectroscopic Instrument (DESI) survey will measure large-scale structures using quasars as direct tracers of dark matter in the redshift range 0.9 < z < 2.1 and using Ly α forests in quasar spectra at z > 2.1.
Edmond Chaussidon +56 more
doaj +1 more source
Target Selection and Validation of DESI Luminous Red Galaxies
The Astronomical Journal, 2023 The Dark Energy Spectroscopic Instrument (DESI) is carrying out a five-year survey that aims to measure the redshifts of tens of millions of galaxies and quasars, including 8 million luminous red galaxies (LRGs) in the redshift range 0.4 < z ≲ 1.0.
Rongpu Zhou +48 more
doaj +1 more source
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
A Southern Photometric Quasar Catalog from the Dark Energy Survey Data Release 2
The Astrophysical Journal Supplement Series, 2022 We present a catalog of 1.4 million photometrically selected quasar candidates in the southern hemisphere over the ∼5000 deg ^2 Dark Energy Survey (DES) wide survey area. We combine optical photometry from the DES second data release (DR2) with available
Qian Yang, Yue Shen
doaj +1 more source
Deconstructing the neutrino mass constraint from galaxy redshift surveys [PDF]
, 2017 The total mass of neutrinos can be constrained in a number of ways using galaxy redshift surveys. Massive neutrinos modify the expansion rate of the Universe, which can be measured using baryon acoustic oscillations (BAOs) or the Alcock-Paczynski (AP ...
A. Boyle, E. Komatsu
semanticscholar +1 more source
The Spectroscopic Data Processing Pipeline for the Dark Energy Spectroscopic Instrument
The Astronomical Journal, 2023 We describe the spectroscopic data processing pipeline of the Dark Energy Spectroscopic Instrument (DESI), which is conducting a redshift survey of about 40 million galaxies and quasars using a purpose-built instrument on the 4 m Mayall Telescope at Kitt
J. Guy +57 more
doaj +1 more source