Rotation axes of the optical galaxies associated with Cygnus A and 3C 33

Details Rotation axes of the optical galaxies associated with Cygnus A and 3C 33 Rotation axes of the optical galaxies associated with Cygnus A and 3C 33

Oct 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...217...45s&link_type=abstract

Astrophysical Journal, Part 1, vol. 217, Oct. 1, 1977, p. 45-50.

Astronomy and Astrophysics

Astrophysics

52

Absorption Spectra, Axes Of Rotation, Emission Spectra, Galactic Rotation, Line Spectra, Radio Galaxies, Galactic Structure, Radial Velocity, Red Shift

Scientific paper

Emission-line velocity curves for the galaxies associated with Cyg A and 3C 33 imply a rotation axis for Cyg A which lies in the plane of the sky and is nearly aligned with that object's radio axes. The emission-line velocities for 3C 33 appear to reflect expansion but may also include a rotational component whose axis is nearly aligned with this object's radio axis. Absorption-line velocities for 3C 33 show that the gas which gives rise to the emission lines is blueshifted with respect to the absorption-line system by 500 km/s. The prominent absorption lines near 5100 A in the spectrum of 3C 33 are those of a normal E galaxy. In the ultraviolet, however, the absorption lines appear to arise from early-type stars.

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