Astronomy and Astrophysics – Astronomy
Scientific paper
May 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pasp...95..293w&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 95, May 1983, p. 293-295.
Astronomy and Astrophysics
Astronomy
3
Galactic Clusters, Galactic Nuclei, Galactic Structure, Ring Galaxies, Astronomical Photography, H Ii Regions, Magnitude
Scientific paper
A new ring galaxy has been discovered in the halo of a nearby rich cluster of galaxies, Abell 1631. The position of the galaxy is alpha = 12h 48 m 27.1s + or - 0.2s, delta = 14 deg 52 arcmin 00 arcsec + or - 3 arcsec. A bright nucleus having a diameter of 3.5 arcsec is located off-center in the ring. The west edge of the ring is slightly bright, which may be due to the presence of giant H II regions. A companion galaxy about one magnitude fainter than the ring galaxy is located nearly on the minor axis of the ring, separated by 14.5 arcsec from the nucleus. Between them, a barely traceable faint bridge can be seen. If the object is assumed to be a cluster member, its absolute magnitude is -20.0 + or - 0.5 on the scale H = 55 km/s/Mpc. The linear diameter of the ring is about 23 kpc, typical of ring galaxies.
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