Gas distribution, motions and dynamics for some dwarf irregular galaxies

Details Gas distribution, motions and dynamics for some dwarf irregular galaxies Gas distribution, motions and dynamics for some dwarf irregular galaxies

Feb 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978a%26a....63...37t&link_type=abstract

Astronomy and Astrophysics, vol. 63, no. 1-2, Feb. 1978, p. 37-47.

Astronomy and Astrophysics

Astrophysics

87

Astronomical Maps, Gas Dynamics, Hydrogen Atoms, Magellanic Clouds, Mass Distribution, Astronomical Models, Atomic Spectra, Line Spectra, Neutral Particles, Velocity Distribution

Scientific paper

High-resolution kinematic data have been obtained for the small Magellanic irregular galaxies DDO 125 and Ho II through observations in the 21-cm H I line. The two galaxies appear to have well-ordered velocity fields which, except at the extremities of the disk, are describable in terms of solid-body rotation. Mass models based on Gaussian distributions are devised for both galaxies; a mass of five times 10 to the eighth power solar masses is established for each galaxy. For the sake of comparison, large-scale features of other irregular galaxies are also considered.

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