On the physical conditions in AGN optical jets |
| |
| Institution: | 1. Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge, CB3 0HA, United Kingdom;2. Clarendon Laboratory, Parks Road, University of Oxford, Oxford, OX1 3PU, United Kingdom;3. Astrophysics, Keble Road, University of Oxford, Oxford, OX1 3RH, United Kingdom;1. Centre for Astrophysics Research, University of Hertfordshire, College Lane, Hatfield AL10 9AB, United Kingdom;2. School of Physical Sciences, The Open University, Walton Hall, Milton Keynes, MK7 6AA, United Kingdom |
| |
| Abstract: | The energy budget of all known optical jets is discussed. It is found that to power the extended radio lobes of radio galaxies, the jet bulk motion on kpc scales must be relativistic, on average. Based on various constraints, a “most probable” region centered around Γbulk～7.5 and θ～20° is found. Because of the consequent relativistic beaming, the rest frame magnetic field is lower and electron lifetimes longer. Combining the effects of time dilation and lower emission rate, the electron diffusion length becomes fully consistent with the deprojected jet length, without the need for reacceleration. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
