Results 71 to 80 of about 335,375 (390)
A massive, quiescent galaxy at a redshift of 3.717 [PDF]
Nature, 2017 Finding massive galaxies that stopped forming stars in the early Universe presents an observational challenge because their rest-frame ultraviolet emission is negligible and they can only be reliably identified by extremely deep near-infrared surveys ...
K. Glazebrook +10 more
semanticscholar +1 more source
Clustering at High Redshift [PDF]
, 2006 2 pages Latex, To appear in the proceedings of "The mass of galaxies at low and high redshift", Venice, Oct 24-26, 2001,eds. R. Bender and A. Renzini (ESO Astrophysics Symposia, Springer-Verlag)
S. Cristiani +4 more
openaire +6 more sources
Reproductive Biology and Endocrinology, 2020 An amendment to this paper has been published and can be accessed via the original article.
David B. Seifer +3 more
doaj +1 more source
The Origin of Low-redshift Event Rate Excess as Revealed by the Low-luminosity Gamma-Ray Bursts
The Astrophysical Journal, 2023 The relation between the event rate of long gamma-ray bursts and the star formation rate is still controversial, especially at the low-redshift end. Dong et al.
X. F. Dong +4 more
doaj +1 more source
The Inverse Redshift-Space Operator: Reconstructing Cosmological Density and Velocity Fields [PDF]
, 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
Redshifting rings of power [PDF]
Physical Review D, 2003 The cosmic microwave background (CMB) has provided a precise template for features in the linear power spectrum: the matter-radiation turnover, sound horizon drop, and acoustic oscillations. In a two dimensional power spectrum in redshift and angular space, the features appear as distorted rings, and yield simultaneous, purely geometric, measures of ...
Wayne Hu, Zoltan Haiman
openaire +3 more sources
HUBBLE PARAMETER MEASUREMENT CONSTRAINTS ON THE REDSHIFT OF THE DECELERATION–ACCELERATION TRANSITION, DYNAMICAL DARK ENERGY, AND SPACE CURVATURE [PDF]
, 2016 We compile an updated list of 38 measurements of the Hubble parameter H(z) between redshifts 0.07 ≤ z ≤ 2.36 and use them to place constraints on model parameters of constant and time-varying dark energy cosmological models, both spatially flat and ...
O. Farooq +3 more
semanticscholar +1 more source
APM z>4 QSO Survey: Distribution and Evolution of High Column Density HI Absorbers [PDF]
, 1996 Eleven candidate damped Lya absorption systems were identified in 27 spectra of the quasars from the APM z>4 survey covering the redshift range 2.83.5). High resolution echelle spectra (0.8A FWHM) have been obtained for three quasars, including 2 of the ...
Irwin, M. J. +2 more
core +2 more sources
The Problem of the Redshifts [PDF]
Symposium - International Astronomical Union, 1983 It is my intention in this brief paper to present once again some of the evidence which appears to show that a major contribution to the redshifts of QSOs and perhaps some galaxies is not associated with the expansion of the universe. The evidence continues to grow and it is of four kinds: (a)Evidence concerning galaxies with discrepant redshifts.(b ...
openaire +2 more sources
Model-independent constraints on dark energy evolution from low-redshift observations [PDF]
Monthly notices of the Royal Astronomical Society, 2018 Knowing the late time evolution of the Universe and finding out the causes for this evolution are the important challenges of modern cosmology. In this work, we adopt a model-independent cosmographic approach and approximate the Hubble parameter ...
S. Capozziello +2 more
semanticscholar +1 more source