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 (131) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (7)
· NED Objects (14)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
The shape of the dark halo in polar-ring galaxies
Authors:
Whitmore, Bradley C.; McElroy, Douglas B.; Schweizer, Francois
Affiliation:
AA(Space Telescope Science Institute, Baltimore, MD), AB(Computer Sciences Corp., Falls Church, VA), AC(Carnegie Institution of Washington, Washington, DC)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 314, March 15, 1987, p. 439-456. (ApJ Homepage)
Publication Date:
03/1987
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Astronomical Photometry, Galactic Evolution, Galactic Structure, Halos, Ring Galaxies, Emission Spectra, Mass Transfer, Nebulae, Stellar Motions
DOI:
10.1086/165077
Bibliographic Code:
1987ApJ...314..439W

Abstract

Photometric and kinematic observations of the polar-ring galaxies NGC 4650A and ESO 415-G26 are presented. The inner component of each system is an S0 galaxy, as was previously found in the case of A0136-0801. A comparison of the circular velocity in the S0 component with the rotation velocity in the polar ring indicates that the halo of dark matter is nearly spherical; the mean value of V(Ring)/V(disk) for the three galaxies is 0.97 + or - 0.08. Estimates for the flattening of equipotentials in the galaxies are 0.86 + or - 0.21, 1.05 + or - 0.17, and 0.98 + or - 0.20. CCD images of both NGC 4650A and ESO 415-G26 show faint disordered nebulosity in the outer regions, suggestive of tidal debris. This provides further evidence that the polar rings in these systems resulted from 'second events' which may have been mergers of two galaxies or near collisions with resultant mass transfers.

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