ESO 255-IG 07, a compact group of interacting galaxies

Details ESO 255-IG 07, a compact group of interacting galaxies ESO 255-IG 07, a compact group of interacting galaxies

Mar 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....95..266b&link_type=abstract

Astronomy and Astrophysics, vol. 95, no. 2, Mar. 1981, p. 266-277.

Astronomy and Astrophysics

Astrophysics

9

Astronomical Photography, Astronomical Spectroscopy, Galactic Evolution, Galactic Structure, Interacting Galaxies, Color Photography, Emission Spectra, Line Spectra, Radial Velocity, Stellar Evolution, Ubv Spectra

Scientific paper

Photographic, photometric, and spectroscopic properties are studied for the galaxy system ESO 255-IG 07 = 0626-471. The system is composed of four main galaxies of normal sizes and luminosities in what looks like a common halo. It is suggested that the halo consists of stars being torn out from the individual galaxies as a consequence of the interaction. Although the galaxies morphologically seem to be of early Hubble types, ionized gas is found to extend over a significant part of all four galaxies and also in a bridge connecting the two northernmost galaxies. Indications of enhanced nuclear activity are found in the northernmost galaxy; it is suggested that cloud-cloud collisions are frequent and could trigger the star formation and enhanced nuclear activity observed.

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