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Soundwaves in the Universe

Soundwaves in the Universe Observations of large scale structure indicate the presence of very large, wall-like superclusters. In their distributions there is a growing evidence, that there is a characteristic scale in excess of 100h −1 Mpc. Other observations seem to imply only Gaussian fluctuations in the power spectrum. We describe how this apparent conflict can be caused by differences in sampling strategy. If the baryon fraction of the background density is high, close to the upper limits from the D abundance, the characteristic scale can possibly be interpreted as a remnant of the acoustic oscillations at recombination. Such a model would have very specific predictions for the position and amplitude of the Doppler peaks in the cosmic microwave background. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acta Physica Hungarica Series A, Heavy Ion Physics Springer Journals

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Publisher
Springer Journals
Copyright
Copyright © 1997 by Akadémiai Kiadó
Subject
Physics; Nuclear Physics, Heavy Ions, Hadrons
ISSN
1219-7580
eISSN
1588-2675
DOI
10.1007/BF03053657
Publisher site
See Article on Publisher Site

Abstract

Observations of large scale structure indicate the presence of very large, wall-like superclusters. In their distributions there is a growing evidence, that there is a characteristic scale in excess of 100h −1 Mpc. Other observations seem to imply only Gaussian fluctuations in the power spectrum. We describe how this apparent conflict can be caused by differences in sampling strategy. If the baryon fraction of the background density is high, close to the upper limits from the D abundance, the characteristic scale can possibly be interpreted as a remnant of the acoustic oscillations at recombination. Such a model would have very specific predictions for the position and amplitude of the Doppler peaks in the cosmic microwave background.

Journal

Acta Physica Hungarica Series A, Heavy Ion PhysicsSpringer Journals

Published: Jul 20, 2009

References