Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....84...85c&link_type=abstract
Astronomy and Astrophysics, vol. 84, no. 1-2, Apr. 1980, p. 85-92.
Astronomy and Astrophysics
Astrophysics
12
Computerized Simulation, Galaxies, H Lines, Hydrogen Clouds, Interacting Galaxies, Interstellar Gas, Mathematical Models, Neutral Gases, Gas Density, Gas Dynamics, Interactions, Radial Distribution, Radial Velocity, Velocity Distribution
Scientific paper
A 2.6 x 2.4 arc min aperture synthesis study of the pair of galaxies NGC 672/IC 1727 has been made in the 21 cm emission line of neutral hydrogen. Total masses, hydrogen masses and related parameters have been derived for both objects. Continuum radiation associated with either galaxy has not been found. The observed essential features are strong displacements of H I centroids and velocity perturbations. These features suggest gravitational interaction. Also, less than 3 percent of the H I mass seems to pertain to a connection between the two galaxies. A computer model of tidal interaction fits the essential features revealed by the observations provided the H I surface density is ring-shaped rather than centrally-condensed.
Combes François
Foy Françoise Claude
Gottesman Stephen T.
Weliachew L.
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