Results 51 to 60 of about 87,875 (159)

Cosmological redshift as a manifestation of nonlinear critical relativistic quantum wave fields

open access: yesFrontiers in Astronomy and Space Sciences
We explore the hypothesis that both Newtonian and relativistic gravitational phenomena may emerge from critical dynamics in nonlinear relativistic wave fields, in analogy with wave–particle duality in quantum systems.
Vitaly L. Galinsky, Lawrence R. Frank
doaj   +1 more source

Electrostatic time dilation and redshift

open access: yesPhysics Letters B, 2020
We first present the salient features of the gravitational time dilation and redshift effects in two ways; by considering the oscillation frequencies/rates of clocks at different heights/potentials and by considering the photons emitted by these clocks ...
Murat Özer
doaj   +1 more source

Debiasing photometric redshift estimations of Gaia quasars [PDF]

open access: yes
openThis work addresses the significant challenges posed by selection biases in obtaining accurate photometric redshift estimations for quasars, which serve as essential probes of the early universe and cosmic struc- ture.
PANAGIOTAKIS, KONSTANTINOS
core  

Interaction between Galaxies and the Intergalactic Medium at z = 3 [PDF]

open access: yes, 2009
In this thesis, we aim to study the clustering properties of galaxies at z ≈ 3 and the relationship between galaxies and the IGM at these redshift via clustering correlation functions.
TUMMUANGPAK, PIMPUNYAWAT
core  

Origins And Evolution Of Galactic Type Diversity

open access: yesInternational Scholastic Journal of Science, 2016
A study is presented into the origins of galactic type diversity and galaxy evolution through investigating the relationship between representative galaxy color index u-v and redshifts.
Kosuke Kanehisa
doaj  

An Empirical Consistent Redshift Bias: A Possible Direct Observation of Zwicky’s TL Theory

open access: yesParticles
Recent advancements have shown tensions between observations and our current understanding of the Universe. Such observations may include the H0 tension and massive galaxies at high redshift that are older than traditional galaxy formation models have ...
Lior Shamir
doaj   +1 more source

The influence of wavelength, flux, and lensing selection effects on the redshift distribution of dusty, star-forming galaxies [PDF]

open access: yes, 2015
International audienceWe interpret the wide variety of redshift distributions for galaxies found by far-infrared and (sub) millimeter deep surveys depending on their depth and wavelength using our phenomenological model of galaxy evolution.
Carlos De Breuck (16219562)   +11 more
core   +1 more source

Luminosity-Environment Relation in the Lowz Sample of the SDSS-III

open access: yesOpen Astronomy, 2016
In this work, we examine the environmental dependence of the u-, g-, r-, i- and z-band luminosities in the LOWZ sample of the Sloan Digital Sky Survey Data Release 10 (SDSS DR10).
Deng Xin-Fa   +6 more
doaj   +1 more source

A Catalog of Photometric Redshift and the Distribution of Broad Galaxy Morphologies

open access: yesGalaxies, 2018
We created a catalog of photometric redshift of ∼3,000,000 SDSS galaxies annotated by their broad morphology. The photometric redshift was optimized by testing and comparing several pattern recognition algorithms and variable selection strategies, and ...
Nicholas Paul   +2 more
doaj   +1 more source

Effects of cosmological model assumptions on galaxy redshift survey measurements [PDF]

open access: yes, 2010
The clustering of galaxies observed in future redshift surveys will provide a wealth of cosmological information. Matching the signal at different redshifts constrains the dark energy driving the acceleration of the expansion of the Universe.
Cimatti, A.   +33 more
core   +1 more source

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