Jul 5 – 10, 2021
Europe/Rome timezone


Dragging is Never Draggy: MAss and CHarge Flows in GR

Jul 5, 2021, 4:30 PM


Dragging is Never Draggy: MAss and CHarge Flows in GR: Block 1

  • Oldrich Semerak (Charles University, Faculty of Mathematics and Physics, Institute of Theoretical Physics)


To spin or not to spin? That is not the only question. In GR, inertia of a body is affected by every other mass-energy present in space-time, whether in sources or in geometry. Thus even “to be” is partially relative. Already before completing his theory, Einstein knew that a particle is heavier if inside a massive shell, and that it becomes dragged along if the shell starts to accelerate. Dragging is still not draggy almost 110 years later: it involves the magnetic component of the field, apparently more imaginative than the electric one, and it very probably drives some of the most exciting phenomena in the Universe, such as jets exhausted from accreting black holes. In this session, we shall be tasting some recent results in the field.

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