Results 21 to 30 of about 926 (266)
Nonlinear relativistic corrections to cosmological distances, redshift and gravitational lensing magnification: II. Derivation [PDF]
Classical and Quantum Gravity, 2014 25 pages, 1 figure. v2 has presentational changes and minor corrections.
Umeh, Obinna +2 more
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Redshift and distances in a ��CDM cosmology with non-linear inhomogeneities [PDF]
Monthly Notices of the Royal Astronomical Society, 2011 15 pages, 12 figures, published in MNRAS. Corrected typos, re-formatted figures, added references and slightly changed notation (r->z)
Meures, Nikolai, Bruni, Marco
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On the Number of Galaxies at High Redshift
Galaxies, 2015 The number of galaxies at a given flux as a function of the redshift, z, is derived when the z-distance relation is non-standard. In order to compare different models, the same formalism is also applied to the standard cosmology.
Lorenzo Zaninetti
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Light propagation and the distance-redshift relation in a realistic inhomogeneous universe [PDF]
Physical Review D, 1989 The propagation of light rays in a clumpy universe constructed by cosmological version of the post-Newtonian approximation was investigated. It is shown that linear approximation to the propagation equations is valid in the region where zeta is approximately less than 1 even if the density contrast is much larger than unity.
, Futamase, , Sasaki
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Distance to M87 as the Mode of the Modulus Distribution
Astronomyde Grijs and Bono (ApJS 2020, 246, 3) compiled a list of distances to M87 from the literature published in the last 100 years. They reported the arithmetic mean of the three most stable tracers (Cepheids, tip of the red giant branch, and surface ...
Mariusz Tarnopolski
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Cosmology in the Universe with Distance Dependent Lorentz-Violating Background
Advances in High Energy Physics, 2017 We consider a cosmological setup with inflaton in the presence of a redshift dependent Lorentz-violating time-like background to address the inflationary regime and other phases of the Universe.
C. A. G. Almeida +4 more
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Measurements of the Hubble constant from combinations of supernovae and radio quasars
Physics Letters B, 2023 In this letter, we propose an improved cosmological model independent method of determining the value of the Hubble constant H0. The method uses unanchored luminosity distances H0dL(z) from SN Ia Pantheon data combined with angular diameter distances dA ...
Tonghua Liu +4 more
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Astronomy & AstrophysicsContext. The multiband HSC-CLAUDS survey comprises several sky regions with varying observing conditions, only one of which, the COSMOS “Deep”, “Ultra Deep” and “Field” (UDF), offers extensive redshift coverage. Aims.
Treyer M. +7 more
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Padé Approximant and Minimax Rational Approximation in Standard Cosmology
Galaxies, 2016 The luminosity distance in the standard cosmology as given by ΛCDM and, consequently, the distance modulus for supernovae can be defined by the Padé approximant.
Lorenzo Zaninetti
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Astronomy & AstrophysicsThe recently initiated SPHEREx and 7DS surveys will deliver low-resolution spectra (R ∼ 20 − 130) for hundreds of millions of galaxies over the optical to near-infrared range (0.4 − 5.0 μm), covering a wide sky area without sample selection. These unique
Bae Jangho +23 more
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