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A test of the adhesion approximation for gravitational clusteringWe quantitatively compare a particle implementation of the adhesion approximation to fully nonlinear, numerical 'N-body' simulations. Our primary tool, cross-correlation of N-body simulations with the adhesion approximation, indicates good agreement, better than that found by the same test performed with the Zel'dovich approximation (hereafter ZA). However, the cross-correlation is not as good as that of the truncated Zel'dovich approximation (TZA), obtained by applying the Zel'dovich approximation after smoothing the initial density field with a Gaussian filter. We confirm that the adhesion approximation produces an excessively filamentary distribution. Relative to the N-body results, we also find that: (a) the power spectrum obtained from the adhesion approximation is more accurate that that from ZA to TZA, (b) the error in the phase angle of Fourier components is worse that that from TZA, and (c) the mass distribution function is more accurate than that from ZA or TZA. It appears that adhesion performs well statistically, but that TZA is more accurate dynamically, in the sense of moving mass to the right place.
Document ID
19950048281
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Melott, Adrian L.
(University of Kansas, Lawrence, KS United States)
Shandarin, Sergei F.
(University of Kansas, Lawrence, KS United States)
Weinberg, David H.
(Institute for Advanced Study, Princeton, NJ United States)
Date Acquired
August 16, 2013
Publication Date
June 10, 1994
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 428
Issue: 1
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
95A79880
Funding Number(s)
CONTRACT_GRANT: NSF OSR-92-55223
CONTRACT_GRANT: NAGW-2923
CONTRACT_GRANT: NSF AST-90-21414
CONTRACT_GRANT: NSF PHY-92-45317
Distribution Limits
Public
Copyright
Other

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