Results 51 to 60 of about 245,319 (342)
On the Anticorrelation between Duration and Redshift in Gamma-Ray Bursts
The Astrophysical Journal, 2023 For gamma-ray bursts (GRBs) with durations greater than two seconds (so-called long GRBs), the intrinsic prompt gamma-ray emission appears, on average, to last longer for bursts at lower redshifts.
Nicole Lloyd-Ronning +6 more
doaj +1 more source
The influence of wavelength, flux, and lensing selection effects on the redshift distribution of dusty, star-forming galaxies [PDF]
, 2015 We interpret the large variety of redshift distributions of galaxies found by far-infrared and (sub-)millimeter deep surveys depending on their depth and wavelength using the Bethermin et al. (2012) phenomenological model of galaxy evolution.
Benson +35 more
core +5 more sources
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
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
Photometric redshifts and quasar probabilities from a single, data-driven generative model
, 2012 We describe a technique for simultaneously classifying and estimating the redshift of quasars. It can separate quasars from stars in arbitrary redshift ranges, estimate full posterior distribution functions for the redshift, and naturally incorporate ...
Abazajian +83 more
core +1 more source
The Scatter in the Relationship between Redshift and the Radio-to-Submm Spectral Index [PDF]
, 1999 We derive the scatter in the relationship between redshift and radio-to-submm spectral index, alpha^{350}_{1.4}, using the observed spectral energy distributions of 17 low redshift star forming galaxies. A mean galaxy model is derived, along with the rms
Blain A. W. +5 more
core +4 more sources
The Astrophysical Journal Supplement Series, 2023 Cosmology constraints serve as a crucial criterion in discriminating cosmological models. The traditional combined method to constrain the cosmological parameters designates the corresponding theoretical value and observational data as functions of ...
Wei Hong +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
Gravitational redshift and asymmetric redshift-space distortions for stacked clusters [PDF]
Monthly Notices of the Royal Astronomical Society, 2017 We derive the expression for the observed redshift in the weak field limit in the observer's past light cone, including all relativistic terms up to second order in velocity. We then apply it to compute the cluster-galaxy cross-correlation functions (CGCF) using N-body simulations.
Shaun Cole +4 more
openaire +5 more sources