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 (142) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (5)
· NED Objects (3)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Velocity mapping and models of the elliptical galaxies NGC 720, NGC 1052, and NGC 4697
Authors:
Binney, J. J.; Davies, Roger L.; Illingworth, Garth D.
Affiliation:
AA(Steward Observatory, Tucson, AZ; Oxford, University, England), AB(National Optical Astronomy Observatoires, Tucson, AZ; Oxford, University, England), AC(Lick Observatory; California, University, Santa Cruz)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 361, Sept. 20, 1990, p. 78-97. (ApJ Homepage)
Publication Date:
09/1990
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
ELLIPTICAL GALAXIES, GALACTIC STRUCTURE, STELLAR MOTIONS, ASTRONOMICAL MODELS, ASTRONOMICAL SPECTROSCOPY, VELOCITY DISTRIBUTION
DOI:
10.1086/169169
Bibliographic Code:
1990ApJ...361...78B

Abstract

CCD surface photometry and extensive long-slit spectroscopy are used to construct detailed models of the flattened ellipticals NGC 720, 1052, and 4697. The models are combined with the Jeans equations to yield predicted fields of line-of-sight velocity dispersion and streaming velocity. By comparing these fields with observed velocities, it is concluded that none of these systems can have isotropic velocity dispersion tensors, and diminishing the assumed inclination of any given galaxy tends to decrease the line-of-sight velocity dispersion and, counterintuitively, to increase the line-of-sight rotation speeds. The ratio of the line-of-sight velocity dispersion along the minor axis to that along the major axis is found to be a sensitive diagnostic of the importance of a third integral for the galaxy's structure.

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