3D spherical analysis of baryon acoustic oscillations
نویسندگان
چکیده
منابع مشابه
Baryon Acoustic Oscillations
Observations of baryon acoustic oscillations (BAO) in the clustering of galaxies offer an attractive method for setting cosmological constraints. The physics of the BAO production is well understood, and it is hard to imagine that galaxy formation processes will significantly distort this large-scale signal. The large volume of the Universe and redshift range probed by proposed SKA surveys will...
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Baryon acoustic oscillations (BAO) in the galaxy power spectrum allows us to extract the scale of the comoving sound horizon at recombination, a cosmological standard ruler accurately determined by the cosmic microwave background anisotropy data. We examine various issues important in the use of BAO to probe dark energy. We find that assuming a flat universe, and priors on Ωm, Ωmh , and Ωbh 2 a...
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In this Letter, we describe a new method to use baryon acoustic oscillations (BAO) to derive a constraint on the possible variation of the speed of light. The method relies on the fact that there is a simple relation between the angular diameter distance (D(A)) maximum and the Hubble function (H) evaluated at the same maximum-condition redshift, which includes speed of light c. We note the clos...
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The baryon acoustic oscillations (BAO) prior to recombination should be imprinted onto the 21cm emission background from the epoch of reionization through the underlying density perturbations. Using an analytical approach for both matter power spectrum (CDM+baryons) and reionization process, we demonstrate the BAO induced signatures on the power spectrum of 21cm emission fluctuations. Future lo...
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We explore the complementarity between two tomographic probes of the universe: baryon acoustic oscillations (in the galaxy power spectrum) and weak gravitational lensing. The galaxy power spectrum characterizes the density fluctuations, whereas the weak lensing shear power spectrum is a direct measure of the potential fluctuations. We find that photometric measurements of baryon oscillations al...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2012
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201118638