Grand design, multiple arm, and flocculent spiral galaxies

Conference · Fri Jun 01 00:00:00 EDT 1990 · Annals of the New York Academy of Sciences; (USA)

OSTI ID:5732377

Elmegreen, B G ^[1]

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1. Florida Univ., Gainesville (USA)

The properties and possible origins of three types of galactic spiral structure are reviewed. The grand design galaxies M81, M100 and M51 apparently contain wave modes, although M51 also contains a material arm of tidal origin in the outer part. Various optical tracers for the spiral pattern speeds in these galaxies are suggested. Multiple arm galaxies may contain either several interfering wave modes or single modes in their inner regions and transient wave packets or star formation arms in their outer regions. Flocculent galaxies may contain either numerous wave modes or wave packets throughout their disks or they may get most of their structure from wave-independent star formation. The relative frequencies and sizes of galaxies with these three types of spirals are given. 76 refs.

• OSTI ID: 5732377
• Report Number(s): CONF-8903265--
• Journal Information: Annals of the New York Academy of Sciences; (USA), Journal Name: Annals of the New York Academy of Sciences; (USA) Vol. 596; ISSN 0077-8923; ISSN ANYAA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BASIC INTERACTIONS
CONFIGURATION
DISTRIBUTION
ELECTROMAGNETIC RADIATION
GALACTIC EVOLUTION
GALAXIES
GRAVITATIONAL INTERACTIONS
INFRARED RADIATION
INTERACTIONS
MASS DISTRIBUTION
MORPHOLOGY
NEAR INFRARED RADIATION
PHOTOGRAPHY
RADIATIONS
SPATIAL DISTRIBUTION
SPIRAL CONFIGURATION
STAR EVOLUTION
WAVE PACKETS