Results 21 to 30 of about 5,210 (169)

Overview of the Instrumentation for the Dark Energy Spectroscopic Instrument [PDF]

open access: yesAstronomical Journal, 2022
The Dark Energy Spectroscopic Instrument (DESI) embarked on an ambitious 5 yr survey in 2021 May to explore the nature of dark energy with spectroscopic measurements of 40 million galaxies and quasars. DESI will determine precise redshifts and employ the
B. Abareshi   +266 more
semanticscholar   +1 more source

The galaxy luminosity function and the redshift-distance controversy (A Review) [PDF]

open access: yesProceedings of the National Academy of Sciences, 1986
The mean relation between distance and redshift for galaxies is reviewed as an observational question. The luminosity function for galaxies is an important ingredient and is given explicitly. We discuss various observational selection effects that are important for comparison of the linear and quadratic distance-redshift laws. Several lines of evidence
E E, Salpeter, G L, Hoffman
openaire   +2 more sources

Redshift-distance Survey of Early-type Galaxies: the ENEARc Cluster Sample [PDF]

open access: yesThe Astronomical Journal, 2002
41 pages, 7 figures, and 8 tables.
Bernardi, M.   +7 more
openaire   +3 more sources

Measuring the distance–redshift relation with the baryon acoustic oscillations of galaxy clusters [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2016
We analyse the largest spectroscopic samples of galaxy clusters to date, and provide observational constraints on the distance-redshift relation from baryon acoustic oscillations. The cluster samples considered in this work have been extracted from the Sloan Digital Sky Survey at three median redshifts, $z=0.2$, $z=0.3$, and $z=0.5$.
VEROPALUMBO, ALFONSO   +4 more
openaire   +3 more sources

Redshift-Distance Survey of Early-Type Galaxies: Dipole of the Velocity Field [PDF]

open access: yesThe Astrophysical Journal, 2000
We use the recently completed redshift-distance survey of nearby early-type galaxies (ENEAR) to measure the dipole component of the peculiar velocity field to a depth of cz ~ 6000 km/s. The sample consists of 1145 galaxies brighter than m_B=14.5 and cz < 7000 km/s, uniformly distributed over the whole sky, and 129 fainter cluster galaxies within the
da Costa, L. N.   +7 more
openaire   +2 more sources

A dark siren measurement of the Hubble constant using gravitational wave events from the first three LIGO/Virgo observing runs and DELVE [PDF]

open access: yesMonthly notices of the Royal Astronomical Society, 2023
The current and next observation seasons will detect hundreds of gravitational waves (GWs) from compact binary systems coalescence at cosmological distances. When combined with independent electromagnetic measurements, the source redshift will be known,
V. Alfradique   +19 more
semanticscholar   +1 more source

The many flavours of photometric redshifts [PDF]

open access: yesNature Astronomy, 2018
Since more than 70 years ago, the colours of galaxies derived from flux measurements at different wavelengths have been used to estimate their cosmological distances.
M. Salvato, O. Ilbert, B. Hoyle
semanticscholar   +1 more source

Synergy between CSST galaxy survey and gravitational-wave observation: Inferring the Hubble constant from dark standard sirens [PDF]

open access: yesScience China Physics Mechanics and Astronomy, 2022
Gravitational waves (GWs) from compact binary coalescences encode the absolute luminosity distances of GW sources. Once the redshifts of GW sources are known, one can use the distance-redshift relation to constrain cosmological parameters.
Ji-Yu Song   +6 more
semanticscholar   +1 more source

Redshift-Distance Survey of Early-Type Galaxies. I. Sample Selection, Properties, and Completeness [PDF]

open access: yesThe Astronomical Journal, 2000
43 pages, 15 figures, submitted to the Astronomical ...
da Costa, L. N.   +7 more
openaire   +2 more sources

NOEMA redshift measurements of bright Herschel galaxies [PDF]

open access: yesAstronomy & Astrophysics, 2019
Using the IRAM NOrthern Extended Millimeter Array (NOEMA), we conducted a program to measure redshifts for 13 bright galaxies detected in the Herschel Astrophysical Large Area Survey with S500 μm ≥ 80 mJy.
R. Neri   +33 more
semanticscholar   +1 more source

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