gravitoelectromagnetism
Sign in to saveAlso known as GEM, gravitomagnetism, gravito-magnetism
thumb|400 px|Diagram regarding the confirmation of gravitomagnetism by Gravity Probe B
~16 min read
Encyclopedic overview
18 sectionsContents
- Background
- Equations
- Potentials
- Lorentz force
- Poynting vector
- Scaling of fields
- Higher-order effects
- Gravitomagnetic fields of astronomical objects
- Earth
- Pulsar
- Lack of invariance
- See also
- Notes
- References
- Further reading
- Books
- Papers
- External links
thumb|400 px|Diagram regarding the confirmation of gravitomagnetism by Gravity Probe B
Gravitoelectromagnetism, abbreviated GEM, is a set of formal analogies between the equations for electromagnetism and relativistic gravitation. More specifically, it is an analogy between Maxwell's field equations and an approximation, valid under certain conditions, to the Einstein field equations for general relativity. Gravitomagnetism is the kinetic effects of gravity, in analogy to the magnetic effects of moving electric charge. The most common version of GEM is valid only far from isolated sources, and for slowly moving test particles.
Excerpted from Wikipedia’s “gravitoelectromagnetism” article, available under the CC BY-SA 4.0 licence.