Answering the parity question for gravitational wave memory
Answering the parity question for gravitational wave memory
The memory of gravitational waves in asymptotically-flat spacetimes, that are solutions of the Einstein vacuum equations, is of purely electric parity, and no magnetic parity memory can occur. We show this by investigating what happens for various classes of asymptotically-flat Einstein-vacuum spacetimes. This is understood within such spacetimes that have …