Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...300l...5s&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 300, Jan. 1, 1986, p. L5-L9. Research supported by
Astronomy and Astrophysics
Astrophysics
8
Galactic Structure, Radio Galaxies, Spiral Galaxies, Angular Momentum, Astronomical Spectroscopy, Isophotes, Visible Spectrum
Scientific paper
Evidence for the presence of distinct, four-armed, spiral structure in the inner optical region (14-18 kpc) of the classical double radio galaxy 3C 33 is reported. This structure is consistent with the measured magnitude of the velocities and orientation of the angular momentum vector of the rotating material in the central regions of this galaxy. On deep images, this spiral can be traced to a distance of 37 kpc from the nucleus. In addition, evidence is presented for an asymmetric offset between the spiral pattern and the dominant, underlying DE galaxy, as well as an outer, asymmetric extension of the galaxy towards the NE. One explanation for these asymmetries is that this galaxy has experienced strong tidal distortion, supporting the currently popular 'merger' hypothesis of radio galaxies. The complex distortion of the object's isophotes and its spiral and irregular asymmetries weight against any simple triaxial interpretation of its structure.
Michel Alexis
Simkin Susan M.
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