| | Active Galaxies and Quasars - Radio Galaxy Cygnus A (Site not responding. Last check: 2007-10-18) |
 | | The first photographs of Cygnus A showed two clumps of luminous material, which led Walter Baade and Rudolph Minkowski to speculate that the radio emission was somehow linked to a galaxy collision. |
 | | This is a narrow-line radio galaxy, but infrared and polarization measurements show that from some directions it would appear as a broad-line object and perhaps as a quasar, so that there is plenty of radiation in some directions to light up the gas. |
 | | Cygnus A is an excellent example of the Fanaroff-Riley (FR) type II radio sources, characterized by faint, very narrow jets, distinct lobes, and clear hot spots at the outer edges of the lobes, often where the jets intersect the outer edges. |
| www.astr.ua.edu /keel/agn/cygnusa.html (359 words) |