The rotation axes of five radio galaxies

Details The rotation axes of five radio galaxies The rotation axes of five radio galaxies

Sep 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.196..987j&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 196, Sept. 1981, p. 987-993. Research supported by the Science Research

Astronomy and Astrophysics

Astronomy

26

Astronomical Spectroscopy, Galactic Rotation, Radio Galaxies, Absorption Spectra, Axes Of Rotation, Black Holes (Astronomy), Elliptical Galaxies, Galactic Evolution, Galactic Nuclei, Galactic Structure, Imaging Techniques, Spheroids, Velocity Distribution

Scientific paper

Spectroscopic results on internal dynamics are presented for five radio galaxies: NGC 3665, NGC 4261 (3C 270), NGC 4374 (M84, 3C 272.1), IC 4296 (PKS 1333-33) and PKS 1610-60. These data and those of Jenkins and Scheuer (1980) indicate that there is no tendency for absorption-line rotation axes to align with radio structure; and in cases where optical minor axes are well defined, rotation axes are often misaligned. Radio ellipticals appear dynamically peculiar compared to ordinary ellipticals, and are not oblate spheroids, due to slow rotation around the minor axis. Two slow rotating galaxies, NGC 4374 and 7626, have twisted isotopes, an indication that they are triaxial objects, while plates of varying exposures for three objects with rotation along minor axes give no evidence for large isophotal twists. It is concluded that some, if not all, radio ellipticals result from mergers of galaxies, and the central black hole has a rotation axis misaligned with that of the complete galaxy.

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