Density peaks and large scale velocities

Alexander S. Szalay; Lars Gerhard Jensen

doi:10.1007/BF03155977

Density peaks and large scale velocities

Alexander S. Szalay
, Lars Gerhard Jensen

Research output: Contribution to journal › Article › peer-review

Abstract

The velocity dispersion of density extrema is calculated for a general fluctuation spectrum and is shown to be-smaller than for randomly selected points for most spectra by a factor 2/(n+3), where |δ_k|² =kⁿ. This is valid for the peculiar velocity distribution of clusters of galaxies as well. Our location near the Virgo cluster changes the interpretation of the large scale velocity field measurements. The results imply that "biased" galaxy formation with cold dark matter has even more serious difficulties than previously suggested by Vittorio and Silk [1].

Original language	English (US)
Pages (from-to)	263-265
Number of pages	3
Journal	Acta Physica Hungarica
Volume	62
Issue number	2-4
DOIs	https://doi.org/10.1007/BF03155977
State	Published - Oct 1987
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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10.1007/BF03155977

Cite this

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title = "Density peaks and large scale velocities",

abstract = "The velocity dispersion of density extrema is calculated for a general fluctuation spectrum and is shown to be-smaller than for randomly selected points for most spectra by a factor 2/(n+3), where |δk|2 =kn. This is valid for the peculiar velocity distribution of clusters of galaxies as well. Our location near the Virgo cluster changes the interpretation of the large scale velocity field measurements. The results imply that {"}biased{"} galaxy formation with cold dark matter has even more serious difficulties than previously suggested by Vittorio and Silk [1].",

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year = "1987",

month = oct,

doi = "10.1007/BF03155977",

language = "English (US)",

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pages = "263--265",

journal = "Acta Physica Hungarica",

issn = "0231-4428",

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T1 - Density peaks and large scale velocities

AU - Szalay, Alexander S.

AU - Jensen, Lars Gerhard

PY - 1987/10

Y1 - 1987/10

N2 - The velocity dispersion of density extrema is calculated for a general fluctuation spectrum and is shown to be-smaller than for randomly selected points for most spectra by a factor 2/(n+3), where |δk|2 =kn. This is valid for the peculiar velocity distribution of clusters of galaxies as well. Our location near the Virgo cluster changes the interpretation of the large scale velocity field measurements. The results imply that "biased" galaxy formation with cold dark matter has even more serious difficulties than previously suggested by Vittorio and Silk [1].

AB - The velocity dispersion of density extrema is calculated for a general fluctuation spectrum and is shown to be-smaller than for randomly selected points for most spectra by a factor 2/(n+3), where |δk|2 =kn. This is valid for the peculiar velocity distribution of clusters of galaxies as well. Our location near the Virgo cluster changes the interpretation of the large scale velocity field measurements. The results imply that "biased" galaxy formation with cold dark matter has even more serious difficulties than previously suggested by Vittorio and Silk [1].

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JO - Acta Physica Hungarica

JF - Acta Physica Hungarica

IS - 2-4

ER -

Density peaks and large scale velocities

Abstract

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