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)
· References in the article
· Citations to the Article (372) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (2)
· NED Objects (1)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Detection of systematic gravitational lens galaxy image alignments - Mapping dark matter in galaxy clusters
Authors:
Tyson, J. A.; Valdes, F.; Wenk, R. A.
Affiliation:
AA(AT&T Bell Laboratories, Murray Hill, NJ), AB(National Optical Astronomy Observatoires, Tucson, AZ), AC(AT&T Bell Laboratories, Murray Hill, NJ),
Publication:
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 349, Jan. 20, 1990, p. L1-L4. (ApJL Homepage)
Publication Date:
01/1990
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Dark Matter, Galactic Clusters, Gravitational Lenses, Brightness Distribution, Charge Coupled Devices, Faint Objects, Red Shift, Spatial Distribution
DOI:
10.1086/185636
Bibliographic Code:
1990ApJ...349L...1T

Abstract

A gravitational lens distorts most background galaxies by stretching along a circle centered on the lens. This systematic alignment of 20-60 faint background galaxy images has been detected, centered on foreground galaxy clusters of high velocity dispersion. The background galaxy population is selected by its extreme blue B-R color. At a limiting surface brightness of 29 B mag/sq arcsec, there are over 30 background galaxies/sq arcmin per mag anywhere in the sky, which is sufficient to map statistically the dark matter distribution in a foreground cluster. The dark matter is apparently correlated (center and radial extent) with the cluster red light, suggestive of a baryonic origin or dissipative coupling. The existence of a high percentage of lens-distorted faint blue galaxies sets a lower limit of approximately 0.9 to this background galaxy population mean redshift.

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)

  New!

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