Optical Spectropolarimetry and Kinematics of Cygnus A

Details Optical Spectropolarimetry and Kinematics of Cygnus A Optical Spectropolarimetry and Kinematics of Cygnus A

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aspc..343..446v&link_type=abstract

Astronomical Polarimetry: Current Status and Future Directions ASP Conference Series, Vol. 343, Proceedings of the Conference he

Astronomy and Astrophysics

Astronomy

Scientific paper

From optical spectropolarimetry of Cygnus A we conclude that the scattering medium in the ionization cones in Cygnus A is moving outward with v= 170± 34kms. The required momentum can be supplied by the radiation pressure of the central quasar. This process could produce the observed biconical structure, which is thought to result from shadowing by a circumnuclear dust torus. We detect a polarized red wing in the [O III] emission lines arising from the central kiloparsec of Cygnus A, consistent with line emission created close to the broad-line region.

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