Frame dragging question.

[tkav1980]

Objects smaller than black holes, by mass can still drag space along with their rotation. I picture this like a plate of Spaghetti there the pasta is radiating out from the center of the plate. But lets say its rubbery spaghetti and can stratch. And its attached at one end to the outer egde of the plate. So you twirl the pasta in the canter causing the pasta to "swirl" around the central mass. Well when a body does this to space, like our sun, Why doesnt it pull space into a complete loop around itself and in effect create an event horizon? Is there some measure of "slip" or lack of "friction" between space and the star that limits this dragging effect to an upper limit, relative to the objects mass?

I would think that if a large object looped space around on itself it would in essence remove itself from our universe in the sence that no information can come from or to that object again. Doesnt that mean our universe ould be incomplete and predictability would essentially go out the window?


Sorry my questions are so elementary. Im not a Physicist just a fan of it.

[Passionflower]

Objects smaller than black holes, by mass can still drag space along with their rotation.

Your statement seem to imply you think that black holes are black holes due to their mass this is not correct. An object is (or becomes) a black hole is when the object's area is smaller than 4 times the area representing its mass. So the ratio is important the absolute value of mass is not significant.


I picture this like a plate of Spaghetti there the pasta is radiating out from the center of the plate. But lets say its rubbery spaghetti and can stratch. And its attached at one end to the outer egde of the plate. So you twirl the pasta in the canter causing the pasta to "swirl" around the central mass. Well when a body does this to space, like our sun, Why doesnt it pull space into a complete loop around itself and in effect create an event horizon? Is there some measure of "slip" or lack of "friction" between space and the star that limits this dragging effect to an upper limit, relative to the objects mass?

I would think that if a large object looped space around on itself it would in essence remove itself from our universe in the sence that no information can come from or to that object again. Doesnt that mean our universe ould be incomplete and predictability would essentially go out the window?

It is not quite like that. Check the river model by Andrew Hamilton, the second part deals with rotating black holes, there is math but the document is still interesting without the math.

http://arxiv.org/abs/gr-qc/0411060

[tkav1980]

Your statement seem to imply you think that black holes are black holes due to their mass this is not correct. An object is (or becomes) a black hole is when the object's area is smaller than 4 times the area representing its mass. So the ratio is important the absolute value of mass is not significant.
I worded That wrong. I meant it as a point of reference of mass. I was thinking of something much more massive than the sun.

It is not quite like that. Check the river model by Andrew Hamilton, the second part deals with rotating black holes, there is math but the document is still interesting without the math.

http://arxiv.org/abs/gr-qc/0411060

Thank you. That helped immensily.

I think my question may be beyond my level of comprehension. Or rather my understanding of the paper I read on rotating black holes, that lead me to a paper on Frame dragging. Admittedly, i had no choice but to skip ofer the math. I fear that is my problem.

[Passionflower]

I think my question may be beyond my level of comprehension. Or rather my understanding of the paper I read on rotating black holes, that lead me to a paper on Frame dragging. Admittedly, i had no choice but to skip ofer the math. I fear that is my problem.
Even with the math it is very hard to understand. :)