H I mapping of outer disks of galaxies - M33 and NGC 3344

The neutral-hydrogen emission of M33 and NGC 3344 has been mapped using the Arecibo telescope. For M33, 166 spectra show that the H I disk extends out to twice the optical radius. The H I distribution displays asymmetric gaps and provides some evidence for a rising rotation curve. The H I distributi...

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Veröffentlicht in:	Astron. J.; (United States) 1989-02, Vol.97, p.390-404
Hauptverfasser:	Corbelli, Edvige, Schneider, Stephen E., Salpeter, Edwin E.
Format:	Artikel
Sprache:	eng
Schlagworte:	640105 - Astrophysics & Cosmology- Galaxies CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS CONFIGURATION COSMIC RADIO SOURCES DISTRIBUTION ELEMENTS EMISSION SPECTRA GALAXIES H1 REGIONS HYDROGEN NONMETALS SPATIAL DISTRIBUTION SPECTRA SPIRAL CONFIGURATION
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Beschreibung
Zusammenfassung:	The neutral-hydrogen emission of M33 and NGC 3344 has been mapped using the Arecibo telescope. For M33, 166 spectra show that the H I disk extends out to twice the optical radius. The H I distribution displays asymmetric gaps and provides some evidence for a rising rotation curve. The H I distribution in NGC 3344 reveals a distinct outer ring rather than a continuous warp. (R.R.)
ISSN:	0004-6256
DOI:	10.1086/114989