Tidal Acceleration of Ultrarelativistic Particles

Details Tidal Acceleration of Ultrarelativistic Particles Tidal Acceleration of Ultrarelativistic Particles

2004-05-31

arxiv.org/abs/astro-ph/0406005v2

Astron.Astrophys. 437 (2005) L39-L42

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures, accepted for publication in Astronomy & Astrophysics Letters

Scientific paper

10.1051/0004-6361:200500137

We investigate the motion of free relativistic particles relative to the ambient medium around a gravitationally collapsed system. If the relative speed exceeds a critical value given by c/sqrt(2), the gravitational tidal effects exhibit novel features that are contrary to Newtonian expectations. In particular, ultrarelativistic jet clumps moving freely outward along the rotation axis strongly decelerate with respect to the ambient medium, while ultrarelativistic particles strongly accelerate in directions normal to the jet axis. The implications of these direct consequences of general relativity for jets in microquasars and the origin of the high-energy cosmic rays are briefly mentioned.

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