Results 31 to 40 of about 295,900 (371)
The VIMOS VLT Deep Survey - First epoch VVDS-Deep survey: 11564 spectra with 17.5<=IAB<=24, and the redshift distribution over 0< z <=5 [PDF]
, 2004 This paper presents the ``First Epoch'' sample from the VIMOS VLT Deep Survey (VVDS). The VVDS goals, observations, data reduction with VIPGI, and redshift measurement with KBRED are discussed.
A. Bongiorno +47 more
core +4 more sources
Accurate precision cosmology with redshift unknown gravitational wave sources [PDF]
, 2020 Gravitational waves can provide an accurate measurement of the luminosity distance to the source but cannot provide the source redshift unless the degeneracy between mass and redshift can be broken.
S. Mukherjee +3 more
semanticscholar +1 more source
[O III] / [N II] as an abundance indicator at high redshift [PDF]
, 2004 Among 'empirical' methods of estimating oxygen abundances in extragalactic H II regions, the use of the ratio of nebular lines of [O III] and [N II], first introduced by Alloin et al., is reappraised with modern calibration data and shown to have certain
M. Pettini, B. Pagel
semanticscholar +1 more source
Revisiting a Negative Cosmological Constant from Low-Redshift Data [PDF]
Symmetry, 2019 Persisting tensions between high-redshift and low-redshift cosmological observations suggest the dark energy sector of the Universe might be more complex than the positive cosmological constant of the Λ CDM model.
L. Visinelli, S. Vagnozzi, U. Danielsson
semanticscholar +1 more source
HIGH-REDSHIFT GALAXIES IN THE HUBBLE DEEP FIELD : COLOUR SELECTION AND STAR FORMATION HISTORY TO Z 4 [PDF]
, 1996 The Lyman decrement associated with the cumulative effect of H I in QSO absorption systems along the line of sight provides a distinctive feature for identifying galaxies at z ≳ 2.5.
P. Madau +5 more
semanticscholar +1 more source
Does the Black Hole Merger Rate Evolve with Redshift? [PDF]
Astrophysical Journal, 2018 We explore the ability of gravitational-wave detectors to extract the redshift distribution of binary black hole (BBH) mergers. The evolution of the merger rate across redshifts 0 < z ≲ 1 is directly tied to the formation and evolutionary processes ...
M. Fishbach, D. Holz, W. Farr
semanticscholar +1 more source
Nature, 1979 Evidence concerning the associations between QSOs and galaxies with similar redshifts, and pairs with very different redshifts is reviewed. It is concluded that both kinds of associations are likely to be real.
openaire +3 more sources
High-redshift cosmography [PDF]
Journal of Cosmology and Astroparticle Physics, 2010 We constrain the parameters describing the kinematical state of the universe using a cosmographic approach, which is fundamental in that it requires a very minimal set of assumptions (namely to specify a metric) and does not rely on the dynamical equations for gravity.
Vitagliano, V. +3 more
openaire +6 more sources
A Future Percent-level Measurement of the Hubble Expansion at Redshift 0.8 with Advanced LIGO [PDF]
Astrophysical Journal, 2019 Simultaneous measurements of distance and redshift can be used to constrain the expansion history of the universe and associated cosmological parameters.
W. Farr, M. Fishbach, Jiani Ye, D. Holz
semanticscholar +1 more source
The redshift of GRB970508 [PDF]
Fourth Huntsville gamma-ray burst symposium, 1998 GRB 970508 is the second gamma-ray burst (GRB) for which an optical afterglow has been detected. It is the first GRB for which a distance scale has been determined: absorption and emission features in spectra of the optical afterglow place GRB 970508 at a redshift of z >= 0.835 [1,2].
openaire +6 more sources