Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979aj.....84.1270d&link_type=abstract
Astronomical Journal, vol. 84, Sept. 1979, p. 1270-1280.
Astronomy and Astrophysics
Astronomy
93
Astrometry, Distance, Galactic Clusters, Spiral Galaxies, Astronomical Coordinates, Dwarf Stars, Luminous Intensity, Magellanic Clouds, Red Shift, Supernovae, Systems Stability, Tables (Data), Velocity
Scientific paper
The distances of eight probable or possible bright members of the Centaurus group of galaxies are derived from secondary and tertiary indicators and from redshifts. The best determined distance is that of M83, and this group centered at supergalactic coordinates L = 154 deg and B = -2 deg covers an elongated area parallel to the supergalactic plane, and has a depth of approximately 2 Mpc in the line of sight. The Fourcade-Figueroa galaxy is probably a background object and the Circinus galaxy is probably a field galaxy, but additional members between it and the group may be hidden near the galactic plane. The velocity dispersion may be interpreted as evidence for stability (bound group) or instability (expanding association or accidental grouping). The presence of three early-type systems in a group dominated by late-type spirals and magellanic irregulars is unusual and suggestive of a chance encounter.
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