Experimental cosmology: The early universe after COBE

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This is the final report of a three-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). Our simulations of the Cold Dark Matter model (CDM) on parallel supercomputers have shown that the galaxy velocity dispersion at small scales is consistent with results obtained from the CfA sky survey. This is significant, since velocity dispersion limits had been previously used to rule out the model. Similarly, we have shown that the redshift-space power spectrum (also used to rule out CDM) does not provide an unambiguous constraint at small scales, and is consistent with the power spectrum ... continued below

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13 p.

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Zurek, W.H.; Bromley, B. & Brainerd, T. December 31, 1998.

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Description

This is the final report of a three-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). Our simulations of the Cold Dark Matter model (CDM) on parallel supercomputers have shown that the galaxy velocity dispersion at small scales is consistent with results obtained from the CfA sky survey. This is significant, since velocity dispersion limits had been previously used to rule out the model. Similarly, we have shown that the redshift-space power spectrum (also used to rule out CDM) does not provide an unambiguous constraint at small scales, and is consistent with the power spectrum measured in the IRAS galaxy catalog. The comparison between the numerical experiments and the observations is not as straightforward as was usually assumed, both because of a significant scatter of velocity dispersions between different observation-sized samples, and because of the importance of clusters.

Physical Description

13 p.

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OSTI as DE98001519

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  • Other Information: PBD: [1998]

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  • Other: DE98001519
  • Report No.: LA-UR--97-3272
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/560870 | External Link
  • Office of Scientific & Technical Information Report Number: 560870
  • Archival Resource Key: ark:/67531/metadc689545

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Office of Scientific & Technical Information Technical Reports

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Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • December 31, 1998

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • May 20, 2016, 1:13 p.m.

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Zurek, W.H.; Bromley, B. & Brainerd, T. Experimental cosmology: The early universe after COBE, report, December 31, 1998; New Mexico. (digital.library.unt.edu/ark:/67531/metadc689545/: accessed April 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.