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 (39) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (2)
· NED Objects (1)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
A molecular gas ridge offset from the dust lane in a spiral arm of M83
Authors:
Lord, Steven D.; Kenney, Jeffrey D. P.
Affiliation:
AA(NASA, Ames Research Center, Moffett Field, CA), AB(California Institute of Technology, Pasadena)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 381, Nov. 1, 1991, p. 130-136. (ApJ Homepage)
Publication Date:
11/1991
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Cosmic Dust, Interstellar Gas, Molecular Clouds, Spiral Galaxies, Carbon Monoxide, Disk Galaxies, H Ii Regions
DOI:
10.1086/170635
Bibliographic Code:
1991ApJ...381..130L

Abstract

A high-resolution interferometric map of the CO emission on the eastern spiral arm of M83 is presented. The detected emission originates in about five unresolved components located parallel but about 300 pc downstream from the dust lane which lies along the inner edge of the spiral arm. All the CO components in the map but one are located within 130 pc of an H II region and may represent emission from locally heated gas. The lack of CO emission on the dust lane indicates that the dense molecular gas does not pile up here in M83. Remarkable differences between the molecular gas distributions in M83 and the spiral arms or M51, where CO emission peaks on the dust lane, is attributed to the difference in the strength of their density waves. The observations of M83 are consistent with the model of Elmegreen in which diffuse gas is compressed at the shock front, producing the dust lane at the inner edge of the spiral arm while dense giant molecular clouds pass through the front and form a broad distribution on the arm.

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