Results 1 to 10 of about 245,319 (342)
Six Peaks Visible in the Redshift Distribution of 46,400 SDSS Quasars Agree with the Preferred Redshifts Predicted by the Decreasing Intrinsic Redshift Model [PDF]
Astrophys.J.648:140-147,2006, 2006 The redshift distribution of all 46,400 quasars in the Sloan Digital Sky Survey (SDSS) Quasar Catalog III, Third Data Release, is examined. Six Peaks that fall within the redshift window below z = 4, are visible. Their positions agree with the preferred redshift values predicted by the decreasing intrinsic redshift (DIR) model, even though this model ...
Bajan K. +10 more
arxiv +4 more sources
Generalized redshift formula through an energy-based framework [PDF]
Scientific ReportsRedshift is a crucial concept in physics; it has significant implications for our understanding of the dynamics and evolution of the cosmos. In this article, we introduce a generalized formula to determine the redshift parameter.
C. Ortiz, F. Ibarra-Castor
doaj +2 more sources
High-z radio galaxies and the `Youth-Redshift Degeneracy' [PDF]
arXiv, 1999 We discuss a unifying explanation for many `trends with redshift' of radio galaxies which includes the relevance of their ages (time since their jet triggering event), and the marked dependence of their ages on redshift due to the selection effect of imposing a flux-limit.
Blundell, Katherine, Rawlings, Steve
arxiv +4 more sources
Using Multivariate Imputation by Chained Equations to Predict Redshifts of Active Galactic Nuclei
Frontiers in Astronomy and Space Sciences, 2022 Redshift measurement of active galactic nuclei (AGNs) remains a time-consuming and challenging task, as it requires follow up spectroscopic observations and detailed analysis.
Spencer James Gibson +12 more
doaj +1 more source
Electromagnetic Waves in Cosmological Spacetime
Universe, 2023 We consider the propagation of electromagnetic waves in the Friedmann–Lemaître–Robertson–Walker metric. The exact solutions for plane and spherical wave are written down. The corresponding redshift, amplitude change, and dispersion are discussed. We also
Denitsa Staicova, Michail Stoilov
doaj +1 more source
Galaxies, 2021 The general problem of calculating of the propagation of electromagnetic radiation from particles or stars moving in the vicinity of a supermassive black hole is considered in geometrical optics approximation within the framework of the general theory of
Stanislav Komarov
doaj +1 more source
Does Lorentz Relativistic Mass Make Dark Energy Superfluous?
Universe, 2022 This paper shows that a simple and relativistic extension of Newtonian gravity that takes into account Lorentz relativistic mass leads to predictions that fit supernova observations of magnitude versus redshift without the need to introduce dark energy ...
Espen Gaarder Haug
doaj +1 more source
A Modified Vilsmeier–Haack Strategy to Construct β-Pyridine-Fused 5,10,15,20-Tetraarylporphyrins
SynOpen, 2020 A modified Vilsmeier–Haack strategy has been developed to construct a novel series of π-extended nickel(II) or copper(II) complexes of 2-chloro-3-formyl- and 3-formylpyrido[2,3-b]porphyrins from 2-acetamido-meso-tetraarylporphyrins. After chromatographic
Pargat Singh, Mahendra Nath
doaj +1 more source
Nanomaterials, 2023 We explore the variation of interband absorption spectra of GaAs spherical sector quantum dots (QDs) in response to a strong resonant laser, using the renormalized wave function method. Even though a spherical sector QD appears identical to a section cut
Le Thi Dieu Hien +5 more
doaj +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