Results 31 to 40 of about 292,957 (316)
Redshift-space distortions [PDF]
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2011 Comparing measurements of redshift-space distortions (RSDs) with geometrical observations of the expansion of the Universe offers tremendous potential for testing general relativity on very large scales. The basic linear theory of RSDs in the distant-observer limit has been known for 25 years and the effect has been conclusively observed ...
Percival W. J. +4 more
openaire +4 more sources
EAZY: A Fast, Public Photometric Redshift Code [PDF]
, 2008 We describe a new program for determining photometric redshifts, dubbed EAZY. The program is optimized for cases where spectroscopic redshifts are not available, or are only available for a biased subset of the galaxies.
G. Brammer, P. V. van Dokkum, P. Coppi
semanticscholar +1 more source
Hemijska Industrija, 2008 If we assume that the observed Redshift of starlight is due to the Doppler effect we end up with models of the universe which contradict the basic laws of science. If we assume that the red shift may be due to a tiring of light, an assumption still to be
Levenspiel Octave
doaj +1 more source
BLAST: THE REDSHIFT SURVEY [PDF]
The Astrophysical Journal, 2009 Accepted for publication in the Astrophysical Journal. Maps and associated results are available at http://blastexperiment.info/
Eales, Stephen +18 more
openaire +4 more sources
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
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
An Optical View of Extragalactic γ-Ray Emitters
Frontiers in Astronomy and Space Sciences, 2017 The Fermi Gamma-ray Observatory discovered about a thousand extragalactic sources emitting energy from 100 MeV to 100 GeV. The majority of these sources belong to the class of blazars characterized by a quasi-featureless optical spectrum (BL Lac Objects).
Simona Paiano +6 more
doaj +1 more source
Radial Redshift Space Distortions [PDF]
, 1998 The radial component of the peculiar velocities of galaxies cause displacements in their positions in redshift space. We study the effect of the peculiar velocities on the linear redshift space two point correlation function.
Ballinger W. E. +10 more
core +4 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
Detecting Helium Reionization with Fast Radio Bursts
, 2020 Fast radio bursts (FRB) probe the electron density of the universe along the path of propagation, making high redshift FRB sensitive to the helium reionization epoch.
Linder, Eric V.
core +1 more source