0000000001115873

AUTHOR

N. Clerc

showing 2 related works from this author

Wavelet analysis of baryon acoustic structures in the galaxy distribution

2011

Baryon Acoustic Oscillations (BAO) are a feature imprinted in the density field by acoustic waves travelling in the plasma of the early universe. Their fixed scale can be used as a standard ruler to study the geometry of the universe. BAO have been previously detected using correlation functions and power spectra of the galaxy distribution. In this work, we present a new method for the detection of the real-space structures associated with this feature. These baryon acoustic structures are spherical shells with a relatively small density contrast, surrounding high density central regions. We design a specific wavelet adapted to the search for shells, and exploit the physics of the process b…

Cosmology and Nongalactic Astrophysics (astro-ph.CO)Cold dark mattermedia_common.quotation_subjectFOS: Physical sciencesContext (language use)AstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysics01 natural sciences0103 physical sciencesDensity contrast010303 astronomy & astrophysicsmedia_commonPhysicsmethods: statistical[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph]010308 nuclear & particles physicsgalaxies: cluster: generalAstronomy and AstrophysicsAcoustic wavecosmology: distance scalecosmology: large-scale structure of Universemethods: data analysisUniverseGalaxyBaryonSpace and Planetary ScienceBaryon acoustic oscillationsAstrophysics - Cosmology and Nongalactic Astrophysics
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Baryon Acoustic Oscillations in LRGs

2012

Baryon Acoustic Oscillations (BAO) have been previously detected using correlation functions and power spectra of the galaxy distribution. In this work, we present a new method for the detection of the real-space structures associated with this feature. These baryon acoustic structures are spherical shells with a relatively small density contrast, surrounding high density central regions. We design a specific wavelet adapted to the search for shells, and exploit the physics of the process by making use of two different mass tracers, introducing a specific statistic to detect the BAO features. We apply our method to the detection of BAO in a galaxy sample drawn from the Sloan Digital Sky Sur…

observational astronomygalactic and extragalactic astronomyAstrophysics and AstronomyPhysicsAstrophysics::Instrumentation and Methods for AstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsRedshiftedCatalogsGalaxiesNatural SciencesComputer Science::Digital LibrariescosmologyAstrophysics::Galaxy Astrophysics
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