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 (36) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (8)
· NED Objects (8)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
The structure and evolution of Hoag's object
Authors:
Schweizer, Francois; Ford, W. Kent, Jr.; Jedrzejewski, Robert; Giovanelli, Riccardo
Affiliation:
AA(Carnegie Institution of Washington, Washington, DC), AB(Carnegie Institution of Washington, Washington, DC), AC(Mount Wilson and Las Campanas Observatoires, Pasadena, CA), AD(Arecibo Observatory, PR)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 320, Sept. 15, 1987, p. 454-463. (ApJ Homepage)
Publication Date:
09/1987
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Astronomical Photometry, Astronomical Spectroscopy, Disk Galaxies, Galactic Evolution, Galactic Structure, Brightness, Centimeter Waves, Kinematics, Optical Emission Spectroscopy, Radial Velocity
DOI:
10.1086/165562
Bibliographic Code:
1987ApJ...320..454S

Abstract

The authors present new imaging, photometric, and spectroscopic observations of Hoag's object, a 16th magnitude galaxy consisting of an almostly perfectly round core surrounded by a faint, apparently detached ring. The core of this distant system appears to be a normal spheroid with a half-light radius of 3.6 kpc, and an apparent rotation at r = 2.5 kpc of Vrotsin i = 18 km s-1. The ring is of comparable luminosity, has a mean radius of 23 kpc, is inclined about 19°±5° to the plane of the sky, and shows knotty structure and gaseous emission lines indicative of young stars. The ring rotates with Vmax= 300(+100,-60) km s-1. The authors rule out several earlier hypotheses on the origin of the ring and propose the new hypothesis that Hoag's object owes its structure to a major accretion event at least 2-3 Gyr ago.

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