Search results for "3103 Astronomy and Astrophysics"

showing 2 items of 2 documents

A weakly random Universe?

2010

The cosmic microwave background (CMB) radiation is characterized by well-established scales, the 2.7 K temperature of the Planckian spectrum and the $10^{-5}$ amplitude of the temperature anisotropy. These features were instrumental in indicating the hot and equilibrium phases of the early history of the Universe and its large scale isotropy, respectively. We now reveal one more intrinsic scale in CMB properties. We introduce a method developed originally by Kolmogorov, that quantifies a degree of randomness (chaos) in a set of numbers, such as measurements of the CMB temperature in some region. Considering CMB as a composition of random and regular signals, we solve the inverse problem of …

PhysicsCosmology and Nongalactic Astrophysics (astro-ph.CO)530 Physicsmedia_common.quotation_subjectCosmic microwave backgroundIsotropyAstrophysics::Instrumentation and Methods for AstrophysicsCosmic background radiationFOS: Physical sciencesAstronomy and AstrophysicsScale (descriptive set theory)General Relativity and Quantum Cosmology (gr-qc)Astrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicsGeneral Relativity and Quantum CosmologyUniverseAmplitude1912 Space and Planetary ScienceSpace and Planetary Science10231 Institute for Computational Science3103 Astronomy and AstrophysicsAnisotropyRandomnessAstrophysics - Cosmology and Nongalactic Astrophysicsmedia_common
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Euclid preparation: XI. Mean redshift determination from galaxy redshift probabilities for cosmic shear tomography

2021

Ilbert, O., et al. (Euclid Collaboration)

statistical [Methods]IMPACTUNIVERSEAstrophysics01 natural sciencesDark energyGalaxies: distances and redshiftdark energyPHOTOMETRIC REDSHIFTS010303 astronomy & astrophysicsWeak gravitational lensingPhotometric redshiftmedia_commonPhysicsdistances and redshift [Galaxies]Dark energy; Galaxies: distances and redshifts; Methods: statisticalSIMULATIONastro-ph.CO3103 Astronomy and AstrophysicsProbability distributionSpectral energy distributiongalaxies: distances and redshiftsAstrophysics - Cosmology and Nongalactic AstrophysicsCosmology and Nongalactic Astrophysics (astro-ph.CO)530 Physicsastro-ph.GAmedia_common.quotation_subjectFOS: Physical sciencesAstrophysics::Cosmology and Extragalactic Astrophysics1912 Space and Planetary Science0103 physical sciencesdistances and redshifts [Galaxies]/dk/atira/pure/subjectarea/asjc/1900/1912DISTRIBUTIONSmethods: statistical010308 nuclear & particles physicsAstronomy and AstrophysicsPERFORMANCE115 Astronomy Space scienceAstrophysics - Astrophysics of GalaxiesEVOLUTIONGalaxyUniverseRedshiftSTELLARRESOLUTIONSpace and Planetary Science10231 Institute for Computational ScienceAstrophysics of Galaxies (astro-ph.GA)Dark energy/dk/atira/pure/subjectarea/asjc/3100/3103[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
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