MG12 - Talk detail |
Participant |
Siutsou, Ivan | |
Institution |
ICRANet - Piazza della Repubblica, 10 - Pescara - PE - Italy | |
Session |
Talk |
Abstract |
EG3 |
Gravitational origin of the Pioneer Anomaly in metric theories of gravitation: can it be done without destruction of coherence between the theory and experiment in gravitational physics? |
From Doppler tracking data and data on circular motion of astronomical objects a metric of the Pioneer Anomaly is obtained. The metric gives a solution to problem of the manifest absence of anomaly acceleration in the orbits of the outer planets and extra-Pluto objects of the Solar system. However, it turns out that light deflection in the metric substantially differs from experimentally established, and the corresponding energy-momentum tensor of matter, which generates such a gravitational field in GR, violates energy dominance conditions. These strongly suggest a non-gravitational origin of the Pioneer Anomaly. |
ANM8 |
Kinetics and electrodynamics of collisionless plasma in GRBs |
We consider initially cold collisionless electron-proton plasma which moves with ultrarelativistic speed and perform numerical integration of 3-dimensional coupled Maxwell-Vlasov equations. We observe plasma reaching equipartition between particles and electromagnetic field and electrons accelerated to larger Lorentz factors with thermal-like energy distribution. Implications of the observed plasma dynamics for GRBs will be discussed. |