Frame dragging by a black hole

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Discussion Overview

The discussion revolves around the concept of frame dragging associated with black holes, particularly in the context of General Relativity. Participants explore the differences between spinning and non-spinning black holes and seek clarification on the behavior of frames in relation to these objects.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant inquires about references for frame dragging expected from black holes, both spinning and non-spinning.
  • Another participant provides a reference from NASA as a starting point for understanding frame dragging.
  • A question is raised regarding whether frames are static for a non-spinning (static) black hole, leading to a clarification that a Schwarzschild black hole would not drag frames.
  • Further inquiry is made about whether the frame is fixed with respect to the event horizon or if there is any radial movement of the frame.
  • A participant expresses uncertainty about the implications of frame growth in relation to black holes.

Areas of Agreement / Disagreement

Participants express differing views on the behavior of frames around static versus rotating black holes, indicating that multiple competing perspectives remain on the topic.

Contextual Notes

There are unresolved assumptions regarding the definitions of static frames and the implications of frame dragging in different scenarios, particularly concerning radial movements and the nature of black holes.

yanniru
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I just read in a popular magazine about the satellite to be launched in order to measure the frame dragging by a spinning Earth as predicted by General Relativity. Can some one tell or give me a reference for the frame dragging expected for a black hole, either spinning or not?
 
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Static frame for non-spinning black hole

From your reference I then presume that for a static black hole, the frames are also static??
 


Originally posted by yanniru
From your reference I then presume that for a static black hole, the frames are also static??

If by static you mean not rotating then yes. A schwarzschild black hole would not drag frames, but any rotating massive object (like the earth) would.
 


By static I am also asking if the frame is fixed with respect to the event horizon, or is there inward or outward radial movement of the frame? Thanks for you patience.
 
Ah, you mean growing in size? I don't know of any results on that.
 

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