Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!linus!decvax!harpo!seismo!hao!hplabs!sri-unix!REM@MIT-MC From: REM%MIT-MC@sri-unix.UUCP Newsgroups: net.space Subject: superluminal objects Message-ID: <14958@sri-arpa.UUCP> Date: Fri, 30-Dec-83 04:34:00 EST Article-I.D.: sri-arpa.14958 Posted: Fri Dec 30 04:34:00 1983 Date-Received: Wed, 4-Jan-84 03:26:22 EST Lines: 15 From: Robert Elton Maas If most of the energy emitted by a jet is sent in essentially the "forward" direction, that is nearly the same direction as the jet itself is moving, which is reasonable for some methods of emitting energy, then jets not aimed nearly directly at us wouldn't emit energy we could see, thus a high percentage of jets would show the superluminal effect compared to if we sampled all directions of jets fairly. Thus I'm not much surprised that we've observed many of these things, and I accept that they are all sub-cee-speed objects in reality until proven otherwise. One test would be blueshift in the jet compared to the quasar itself. If the jets are observed only at radio wavelengths, spectral lines might be difficult to identify. Anybody have info about blueshift or not blueshift of apparent-superluminal quasar jets?