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 (26) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (66)
· Reads History
·
· Translate This Page
Title:
Does the Galaxy have four spiral arms
Authors:
Bash, F. N.
Affiliation:
AA(Texas, University, Austin, TX)
Publication:
Astrophysical Journal, Part 1, vol. 250, Nov. 15, 1981, p. 551-560. (ApJ Homepage)
Publication Date:
11/1981
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Density Wave Model, Galactic Rotation, Galactic Structure, Milky Way Galaxy, Radial Velocity, Spiral Galaxies, Astronomical Models, Galactic Evolution, H Ii Regions, Hydrodynamics, Kinematics, Wave Propagation
DOI:
10.1086/159401
Bibliographic Code:
1981ApJ...250..551B

Abstract

The Georgelin and Georgelin (GG) spiral four-arm model for the Galaxy is examined. A two-arm density wave model is shown to predict an H II region in the same direction and with the same radial velocity as observed regions used by GG. Results of the two-arm model indicate that the GG kinematic distances differ from the model by more than a factor of two in 30% of the cases. The galactic rotation curve is also examined, and it is found that the rotation curve does not converge to the curve used in the GG model. Results suggest that the two-arm density wave model can adequately predict the observed locations and velocities of bright galactic H II regions.

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