Optical continuum structure of Cygnus A

Details Optical continuum structure of Cygnus A Optical continuum structure of Cygnus A

1998-03-27

arxiv.org/abs/astro-ph/9803310v1

Astronomy and Astrophysics

Astrophysics

11 pages in PDF format. Last page is a colour plate. To be published in the KNAW colloquium on: "The most distant radio galaxi

Scientific paper

As a prerequisite for interpreting new observations of the most distant radio galaxies, we make an optical study of the closest powerful radio source, Cygnus A. Using Keck imaging- and spectro-polarimetry in conjunction with HST, WFPC2 broad and narrow band imaging, we are able to identify specific geometrical structures in the galaxy with optical continuum components distinguished by both colour and polarimetric properties. A 4 kpc diameter dusty ring of young stars forms the equator of a double ionization cone which is co-axial with the radio jets.

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