Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-12-17
New Astron.Rev. 47 (2003) 411-415
Astronomy and Astrophysics
Astrophysics
6 pages, 2 figures. Invited talk at the meeting: "The Physics of Relativistic Jets in the CHANDRA and XMM Era", 23-27 Septembe
Scientific paper
10.1016/S1387-6473(03)00061-7
The power of blazar jets rivals the power that gravity can extract from accreting matter. The mechanism launching and accelerating jets can be considered as the most efficient engine operating in radio--loud sources. It is still a matter of debate if the jet carries this power to the radio lobes, hundreds of kpc away, in the form of Poynting flux or bulk kinetic energy, or both, and if these two ingredients have relative weights changing along the way. Accordingly, there are two (or more) possible general scenarios for how the jet can dissipate part of its power into radiation. It can be through e.g. reconnection of the magnetic field in the purely electromagnetic scenario, or through internal shocks in the matter dominated picture. Ways to discriminate these ideas are welcome.
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