Can anyone point me to a journal article that describes, mathematically or otherwise, how those jets shoot from the poles of some black holes with accretion discs and AGN. Also, if you will forgive the additional question, is there any reason why the physics that describe the ejection from black hole poles might not also explain Pulsars and Magnetars? By this I mean to ask if Pulsars and Magnetars might be ejecting photons from both poles, but through some process its axis has gone wobbly (like Mars does from time to time) and from earth we only see the radio signal from one pole? I understand that if an object is orbited, rather than orbiting something, it is much more likely to always orbit on its axis. Thank you for your help, and don't hesitate to tell me if this is simply a moronic question and to go hang out on a Star Trek fan site (and I don't like Star Trek). Sorry if this is a frequently asked question. I haven't searched the database yet.