Other
Scientific paper
Jan 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....95...37c&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 95, Jan. 1988, p. 37-44.
Other
68
Dwarf Galaxies, Galactic Mass, H I Regions, Mass Distribution, Dark Matter, Galactic Evolution, Mass To Light Ratios, Spiral Galaxies
Scientific paper
The paper presents a study of the H I and mass distribution for the dwarf 'regular' galaxy UGC 2259. The H I content of UGC 2259 is typical of that found in more luminous Scd galaxies. The distribution of H I surface densities is shown to be constant out to about D(25) before starting to decrease. The H I velocity field is regular; no systematic variation of the orientation parameters with radius is found. The shape of this galaxy's rotation curve is similar to that seen in more luminous spirals while the rotational velocities on the rising branch coincide with those predicted for a low-luminosity Sc spiral. To reproduce the observed rotation curve, a 'minimum' isothermal halo with sigma = 55 km/s and r(c) = 5.5 kpc must be added to the stellar disk.
Carignan Claude
Sancisi Renzo
van Albada Tjeerd S.
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