Questions tagged [frame-dragging]
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Will the spacetime around a rotating spherical massive body change in time or not?
The spacetime around a rotating massive body is distorted (in addition to the distortion caused by the body's gravity) by frame dragging. My question is simple. Is this distortion around a massive ...
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0answers
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Does the frame dragging Schiff Equation imply opposite directions of spin over the pole compared to the equator?
In reviewing the answers to Schiff Equation in a polar orbit, I see that the Schiff Equation for rotation about the z-axis (north-south pole axis) can be written as:
This is integrated to give an ...
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1answer
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Is MTW's argument in favor of Mach's principle valid?
Looking at older books, I was surprised to see that the general relativity "bible" by Misner, Thorne, and Wheeler is very strongly in favor of Mach's principle, which is treated in section 21.12.
...
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1answer
75 views
Gravitational lensing redshift around a Kerr black hole
Light from a source passes by a Kerr black hole on two sides at the equator and converges at the observer. The axis of rotation of the black hole is perpendicular to the direction of light. Two rays ...
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1answer
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Spacetime drag and galaxies' radial velocity mismatch
We know - or theorize - that a spinning black hole drags spacetime in its surroundings, producing measurable effects on the accretion disk (the minimum stable orbit radius).
What I cannot grasp is why ...
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0answers
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How much heat energy is generated by the Sun and Moon's gravitational action on the Earth?
How much heat energy is generated by the Sun and Moon's gravitational action on the Earth?
It would seem fairly obvious that any spinning body orbiting a massive object will convert its own motion ...
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1answer
25 views
Does mass have a larger frame dragging effect than energy?
A rotating mass will twist spacetime and cause orbiting bodies to precess. My question is whether the mass of the rotating body itself plays a bigger role in the dragging effect than energy and how ...
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1answer
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Does Frame Dragging exert a force?
Can a planet in a stable clockwise orbit slow down into a spiral if orbiting a black hole spinning counter-clockwise?
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What does that mean, a black hole “rotates”? [duplicate]
A black hole has:
a mass
electrical charge
angular momentum?
In the inner, there is a singularity, all the mass, collapsed to one point.
The event horizon is surrounding that singularity.
How can a ...
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0answers
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Effects on Niven Ring Around Kerr Black Hole
Suppose I have a Kerr black hole (rotating, uncharged) and I build a giant ring (a "Niven Ring") around it. I am interested in two related scenarios (I am confused about the second, but am also ...
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1answer
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Frame Dragging by Sag A star
Is frame dragging by the supermassive black hole Sag A responsible for the milky way's rotation? If so would we also be part of time dilation depending on how close we are to Sag A? Is the gravity ...
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1answer
171 views
Why Does Spinning Mass Twist Spacetime
Massive spinning objects (such as Kerr black holes) 'twist' spacetime around them, as predicted by Einstein's theory of general relativity. Can someone explain qualitatively why this happens? Is there ...
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1answer
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Atom interferometry,gravity and inertia: What can it measure that light interferometry can't? [closed]
What previously unexplored effects in gravity and inertia can be examined with atom interferometry in ways that hasn't already been done through light interferometry?
Can atom interferometry be used ...
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2answers
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Frame-dragging of a rotating doughnut
Gravitomagnetic arguments also predict that a flexible or fluid toroidal mass undergoing minor axis rotational acceleration (accelerating "smoke ring" rotation) will tend to pull matter through the ...
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2answers
106 views
Do light experience Doppler shift along and against frame dragging?
Imagine 2 photons traveling along the equator in opposite directions, of course I'm not suggesting light goes into orbit I'm just wandering if these photons will be blue and red shifted ever so ...
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1answer
48 views
Can GR effects be verified or measured with balance beam experiment?
I have a question about a gravitational thought experiment. In relation to GR there is some attention paid to the torque exerted on the local space by a spinning mass, although I think only a sphere ...
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3answers
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The physical meaning of the cross-term of Kerr metric
I have been experimenting with different types of metric tensors in General Relativity. I decided to try my hand with the Kerr Metric. When I did, I found an odd term in it: namely, a cross product of ...
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1answer
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Does Earth-spin affect the retrograde orbital motion of artificial satellites?
If frame-dragging is true then how the retrograde satellites orbit in the opposite direction to the earth spin direction?
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1answer
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Geometry of the curvature of spacetime around rotating or spinning revolving objects
What is the geometry of the curvature of spacetime around rotating or spinning revolving objects, or anything that has an angular momentum?
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1answer
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A question about framedragging
Is the spacetime curvature caused by gravito-magnetism constant, or does it change over time, like winding up a spring? I mean, if a heavy spinning mass, for example a neutron star (or the earth, for ...
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1answer
47 views
Forces on a rotating black hole
Could a rotating black hole experience Magnus type forces in the vicinity of a super-massive black-hole (non-rotating)? If it were falling towards the super-massive black-hole would it begin to ...
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2answers
234 views
Is frame drag the magnetic part of gravity? [closed]
Like moving charged mass creates an magnetic field, does moving mass also creates a magnetic field associated with moving (accelerated) mass? And if so, why does the mass have to accelerate, while in ...
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0answers
280 views
Frame dragging VS Mach's principle: rotating body in an empty universe
What I understand about Mach's principle VS modern physics:
According to classical physics, there are ways to distinguish weather a body is rotating or not. For example if it is rotating, the ...
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1answer
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Frame dragging resulting in an orbital plane?
In astrophysics today we talked about spinning black holes, ring singularities, and frame dragging. Is this also (to some degree) the cause of the milky way being as flat as it is? Does the spin of ...
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1answer
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Why do planetary all rings seem to be on the equatorial plane?
Why do planetary all rings seem to be on the equatorial plane?
When I first saw a picture of Uranus and its rings, I was surprised by their inclination, 90 degrees from the axis of rotation.
This ...
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2answers
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Does a spinning mass follow a straight trajectory in empty space? Or is it curved like a golf ball?
Suppose that we can send to identical satellites (like Voyager 1&2) on identical trajectories. But one spins to the right while the other spins to the left. Would they follow the same trajectory?...
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2answers
635 views
Is there a doppler effect on the images of stars around rotating black holes?
I'm an illustrator working on a project involving rotating black holes like those discussed in "Gravitational Lensing by Spinning Black Holes in
Astrophysics, and in the Movie Interstellar" by James, ...
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1answer
533 views
Does frame dragging apply to linear motion?
Firstly I will admit I do not understand the real cause of rotational frame dragging and some of the math heavy explanations are too complicated for me. To me frame dragging looks like unsubstantiated ...
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1answer
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Frame-dragging (conservation of angular momentum)
The frame-dragging-effect implies the rotation (in the direction of black hole angular momentum) of every object in the ergosphere. But what about the conservation of angular momentum if the object ...
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0answers
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Is there an absolute accelerated frame of reference?
I know from special relativity and from a little common sense that there is no absolute inertial frame of reference; that is, physics acts the same no matter what velocity you go at. However, that ...
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1answer
235 views
Do two bodies spinning about the same axis in the opposite direction repel each other?
I recently read about the GEM equations, which look very much like the Maxwell's equations.
Does this mean the behavior of mass is like the the behavior of the electric charge?
So for example if you ...
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3answers
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How does a rotating object cause frame dragging?
Frame dragging is a consequence of general relativity.
But I don't really understand it. Of course I can find metaphors like the "honey metaphor" where stirring a honey can move the specks even if ...
2
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0answers
160 views
Forward's frame-dragging accelerator
On 1962, Robert Forward studied the possibility of using General Relativity Frame-Dragging effects to accelerate probes inertially (that is, without feeling any internal G-forces)
One of the ideas is ...
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2answers
455 views
Frame dragging around a black hole
If you have one stationary non-rotating black hole, being orbited by a 2 or more black holes just outside each other's event horizons does this alter the size of the central black hole's event horizon?...
