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

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

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....97..390c&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 97, Feb. 1989, p. 390-404.

Astronomy and Astrophysics

Astronomy

71

Astronomical Spectroscopy, H I Regions, Spiral Galaxies, Emission Spectra, Hydrogen, Velocity Distribution

Scientific paper

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.

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