Sign on

SAO/NASA ADS Astronomy Abstract Service


· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· arXiv e-print (arXiv:astro-ph/9311059)
· References in the article
· Citations to the Article (77) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (4)
· Also-Read Articles (Reads History)
· HEP/Spires Information
·
· Translate This Page
Title:
Wiener Reconstruction of All-Sky Galaxy Surveys in Spherical Harmonics
Authors:
Lahav, O.; Fisher, K. B.; Hoffman, Y.; Scharf, C. A.; Zaroubi, S.
Publication:
Astrophysical Journal Letters v.423, p.L93 (ApJL Homepage)
Publication Date:
03/1994
Origin:
APJ; KNUDSEN; NED
Astronomy Keywords:
GALAXIES: CLUSTERING, COSMOLOGY: LARGE-SCALE STRUCTURE OF UNIVERSE, METHODS: STATISTICAL
DOI:
10.1086/187244
Bibliographic Code:
1994ApJ...423L..93L

Abstract

The analysis of whole-sky galaxy surveys commonly suffers from the problems of shot-noise and incomplete sky coverage (e.g., at the Zone of Avoidance). The orthogonal set of spherical harmonics is utilized here to expand the observed galaxy distribution. We show that in the framework of Bayesian statistics and Gaussian random fields the 4pi harmonics can be recovered and the shot-noise can be removed, giving the optimal picture of the underlying density field. The correction factor from observed to reconstructed harmonics turns out to be the well-known Wiener filter (the ratio of signal to signal + noise), which is also derived by requiring minimum variance. We apply the method to the projected 1.2 Jy IRAS survey. The reconstruction confirms the connectivity of the supergalactic plane across the Galactic plane (at Galactic longitude l~135^deg^ and l~315^deg^) and the Puppis cluster behind the Galactic plane (l~240^deg^). The method can be extended to three dimensions in both real and redshift space, and applied to other cosmic phenomena such as the COBE microwave background maps.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences



More Article Retrieval Options

HELP for Article Retrieval


Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)


Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints