- #1
Lord Crc
- 343
- 47
I thought gravitational waves were how changes in the gravitational field was propagated. The Insight https://www.physicsforums.com/insights/how-fast-do-changes-in-the-gravitational-field-propagate/ says so as well.
What got me confused was the following scenario: take a stationary black hole of suitable size (tens of solar masses?) with an orbiting companion body, a neutron star for example. Then shoot another suitably sized black hole into the system with such a velocity that it grazes the EH of the stationary black hole and escapes the system.
The intruder BH should cause the stationary BH to move no? If it does, the gravitational field felt by the companion mass would change too no? How is this change propagated?
What got me confused was the following scenario: take a stationary black hole of suitable size (tens of solar masses?) with an orbiting companion body, a neutron star for example. Then shoot another suitably sized black hole into the system with such a velocity that it grazes the EH of the stationary black hole and escapes the system.
The intruder BH should cause the stationary BH to move no? If it does, the gravitational field felt by the companion mass would change too no? How is this change propagated?