What is RELATIVISTIC JET? What does RELATIVISTIC JET mean? RELATIVISTIC JET meaning & explanation

✪✪✪✪✪ http://www.theaudiopedia.com ✪✪✪✪✪ What is RELATIVISTIC JET? What does RELATIVISTIC JET mean? RELATIVISTIC JET meaning - RELATIVISTIC JET definition - RELATIVISTIC JET explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. Relativistic jets are very powerful jets of plasma with speeds close to the speed of light that are emitted by the central black holes of some active galaxies (notably radio galaxies and quasars), stellar black holes, and neutron stars. Their lengths can reach several thousand or even hundreds of thousands of light years. If the jet speed is close to the speed of light, the effects of the Special Theory of Relativity are significant; for example, relativistic beaming will change the apparent beam brightness (see the 'one-sided' jets below). The mechanics behind both the creation of the jets and the composition of the jets are still a matter of much debate in the scientific community. Jet composition might vary; some studies favour a model in which the jets are composed of an electrically neutral mixture of nuclei, electrons, and positrons, while others are consistent with a jet primarily of positron-electron plasma. Massive galactic central black holes have the most powerful jets. Similar jets on a much smaller scale develop from neutron stars and stellar black holes. These systems are often called microquasars. An example is SS433, whose well-observed jet has a velocity of 0.23c, although other microquasars appear to have much higher (but less well measured) jet velocities. Even weaker and less relativistic jets may be associated with many binary systems; the acceleration mechanism for these jets may be similar to the magnetic reconnection processes observed in the Earth's magnetosphere and the solar wind. The general hypothesis among astrophysicists is that the formation of relativistic jets is the key to explaining the production of gamma-ray bursts. These jets have Lorentz factors of ~100 or greater (that is, speeds over roughly 0.99995c), making them some of the swiftest celestial objects currently known.