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How do we account for the 'one way' drag of moving space?

As I understand it, the rotating space outside a Kerr black hole drags radially falling particles into circular motion. Similarly the river model posits that the inward flow of space ensures particles ...
KDP's user avatar
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8 votes
1 answer
2k views

Is this an actual photo of frame dragging?

Is this new image (below) of polarized light surrounding Sagittarius A, showing actual frame dragging being captured by the magnetic field? The image is from this article If not, how would a photo ...
foolishmuse's user avatar
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What angle would frame dragging shove matter in the innermost accretion disk relative to the equatorial plane or orbit?

I understand that frame dragging will imbue momentum on plasma orbiting a black hole at close range. My first question is - is this kinetic energy inserted very narrowly relative to the equatorial ...
Khannea's user avatar
-1 votes
1 answer
65 views

What's the difference between these two frame-dragging equation?

Conceptually, what is the difference between these two frame-dragging equations, describing the rate of angular velocity of the space around a symmetrically spherical mass such as a black hole and why ...
Tivity's user avatar
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1 vote
1 answer
27 views

Do frame dragging affects falling object?

Imagine there is a tall tower erected at the equator, a pulse of light is beamed from the top of the tower to the ground. Do I need to consider frame dragging? After all the spacetime is being tucked ...
user6760's user avatar
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2 votes
0 answers
42 views

What will happen to the light due to frame-dragging?

Imagine a rotating black hole is blocking a cluster of stars that I'm observing. Thanks to gravitational lensing I could still see the stars albeit shifted away from their original locations. So now ...
user6760's user avatar
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0 votes
0 answers
32 views

Is there a known formula of the speed distribution of distinct layers in the frame-dragging region of a BH?

I am asking this question only because I want to figure out does space move in this case similarly to a fluid like water or oil are or even more better as speeds o planets around a star.. or this ...
jbradvi9's user avatar
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0 votes
1 answer
85 views

Gravitomagnetic Field vs Distance

If we look at what the Wikipedia says about gravitomagnetic fields $B$ generated by rotating planets / stars we have: https://en.wikipedia.org/wiki/Lense%E2%80%93Thirring_precession#...
Phil Bouchard's user avatar
2 votes
0 answers
53 views

Can linear frame dragging cause gravitational dipole radiation?

I have just learned that linear frame dragging exists in General Relativity. I have also seen simulations where a periodically accelerated and decelerated mass causes a sort of gravitational dipole ...
ramiel46692's user avatar
1 vote
1 answer
48 views

Space mission for experimental verification of frame-dragging in the strong-gravity limit

Frame-dragging is an important general relativistic effect that has been observed in the weak-field limit by the Gravity Probe B experiment for the gravitational field of the Earth. Although the ...
Richard's user avatar
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-4 votes
2 answers
103 views

Speed of light affected by gravity or frame dragging effect

If we do not really 100% know how light works as a oscillation we also do not know is its speed indeed constant no matter is there a space or space-time motion that can affect it. Could a device that ...
Krešimir Bradvica's user avatar
3 votes
0 answers
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Thirring-Lens 1918 Paper seems to be wrong in the numeric results. Am I misreading it?

The 1918 paper that is often considered a basis for frame dragging (a copy is at http://www.neo-classical-physics.info/uploads/3/4/3/6/34363841/lense_thirring_-_lense-thirring_effect.pdf) seems to say ...
Ralph Berger's user avatar
0 votes
0 answers
73 views

Frame dragging in vicinity of rotating black hole

I am trying to understand subject effect in the framework of general relativity. Wikipedia says as follows: imagine that a north–south-oriented ice skater, in orbit over the equator of a rotating ...
i_prob_should_know_this's user avatar
2 votes
1 answer
69 views

Particle motion due to frame dragging near a pulsar?

PSR J1748−2446ad is the fastest known pulsar rotating at 716 times per second. This neutron star is estimated to have a mass of less than two solar masses and a radius of less than 16km. The linear ...
Roger's user avatar
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1 vote
1 answer
39 views

Do stationary objects (constant distance and angle to central body) experience frame dragging?

Imagine there is a test mass in the vicinity of spinning black hole, but the test mass is kept in place, i.e. it is not in free fall or orbit. Does it experience frame dragging? My guess would be 'no',...
giantsqueed's user avatar
0 votes
1 answer
40 views

When black holes rotating in opposite directions meet does frame dragging stop where they meet?

Does spacetime stop being dragged when counterclockwise rotation meets clockwise rotation for black holes of equal mass?
user avatar
2 votes
1 answer
103 views

Will two passing bricks in empty space induce rotation in one another?

Two identical rectangular bricks with mass $m$ pass each other anti-parallel in empty space with a constant velocity $v$. Say the smallest distance between them is $s$. Assume the bricks to be aligned ...
Gerald's user avatar
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1 vote
0 answers
74 views

Do irreducible off-diagonal components in the stress-energy-momentum tensor cause framedragging effects?

Let's take a look at the stress-energy-momentum tensor: We can distinguish various components. The 00 component represents the mass-energy density as seen in a local frame moving along with the ...
Gerald's user avatar
  • 500
0 votes
1 answer
181 views

If I make the entire universe rotate, will the bucket appear to be rotating?

Newton's bucket experiment is a way to tell if you are in a rotating frame. If you have a bucket of water which is spinning the water surface will form a concave shape. Likewise, if the bucket is not ...
AccidentalTaylorExpansion's user avatar
1 vote
3 answers
161 views

Does Mach's principle imply that the gravitational field has a non-zero curl?

I would normally visualize the gravitational field as "radial", i.e., one whose curl is zero. However, while thinking about Mach's principle, particularly the notion of frame-dragging (as ...
Tfovid's user avatar
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1 answer
31 views

Is frame dragging accelerating asteroids or cometes that after passing fairly close to the gravitational source move away?

What is interesting but also confusing for me,if this is true, is that if frame dragging somehow gives a'kick' to a highly elliptical orbiting object it seems that this object cannot orbit for so long ...
jbradvi9's user avatar
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0 votes
1 answer
35 views

Will the trajectory of a body moving straight towards a rotating BH differ if space just rotates around or if space spiralls into the BH?

Will the trajectory of a body moving straight towards a rotating BH differ if space just rotates around or if space spiralls into the BH? Can this difference be clearly measured? Also as a very dense ...
Krešimir Bradvica's user avatar
3 votes
1 answer
310 views

Are rotating black holes producing a frame dragging effect inside the event horizon?

Are rotating black holes producing a frame dragging effect inside the event horizon? Is that effect moving space inside the event horizon at speeds far greater than the speed of light?
Krešimir Bradvica's user avatar
8 votes
1 answer
150 views

Can a drop of water be set in rotational motion by rotating mass around it?

We are in empty space and see a spherical drop of water. Around the drop we have placed a massive shell with uniform density. The drop is positioned at the center. Then we set the shell in rotational ...
MatterGauge's user avatar
1 vote
1 answer
38 views

How much percent of the speed of rotation of the solar surface at the equator is due to frame dragging effect? [closed]

Frame dagging effect is interesting and my particular interest is does this rotation could be compared with the law of motion of planets in a system similar to our Solar system and also can we measure ...
Krešimir Bradvica's user avatar
1 vote
1 answer
163 views

What spins as a black hole? (lame question) [duplicate]

Obviously I am not a physicist. I have seen What is black hole spin? but this is not what puzzles me. If I understand correctly, black hole has only three features (please correct me): angular ...
dllhell's user avatar
  • 239
2 votes
3 answers
527 views

Would our orbit really remain the same if the sun were a black hole of equal mass?

There seems to be an idea floating around that the sun could be replaced by anything of equal mass with no consequence to our orbit. It seems to me that if the mass of the sun were confined to a ...
Stuart B's user avatar
2 votes
1 answer
63 views

Is the rotation of Gravity Probe B's frame dragging precession in the same direction or opposite direction of Earth's rotation?

First, thank you to the community for answering questions like this, it is much appreciated. Second, I did try to find the answer online first, and I believe from some images that the direction of ...
Ralph Berger's user avatar
1 vote
0 answers
53 views

How do I reconcile (what I see as) an apparent difference in the frame dragging formula used for Gravity Probe-B versus Lageos?

The frame dragging impact above the north pole is given at NASA's Gravity Probe-B website as: $$\Omega = \frac{GI\omega}{c^2r^3}.$$ That is, when the satellite is above the pole, it rotates with the ...
Ralph Berger's user avatar
2 votes
1 answer
89 views

Does frame dragging impart momentum?

Let's say a large object (think runaway planet) passed a much smaller one. The larger object's frame dragging distorts the space inhabited by the smaller object, so that it appears to briefly follow ...
Ben Warner's user avatar
0 votes
1 answer
46 views

Will an object with linear velocity in outer space experience frame dragging effects?

Will an object moving non-accelerated in outer space experience frame-dragging? It seems the mass contributions to the strdss-energy-momentum tensor are distributed spherically symmetrical, and don't ...
MatterGauge's user avatar
0 votes
2 answers
47 views

What distant observer would see if spaceship remains insitu just outside event horizon?

Imagine 2 spaceships found themselves just outside the event horizon of a blackhole, spaceship A tries to remain in place relative to the black hole while B accelerates around the blackhole. To a ...
user6760's user avatar
  • 13k
4 votes
2 answers
183 views

How is electromagnetic induction analogous to gravitational frame dragging?

This wiki says: https://en.wikipedia.org/wiki/Frame-dragging Qualitatively, frame-dragging can be viewed as the gravitational analog of electromagnetic induction. I was wondering what exactly this ...
Tristan's user avatar
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0 votes
0 answers
35 views

Could quantum vacuum polarization increase GR frame dragging beyond the predicted values and therefore replace DM explanation of galactic rotation? [duplicate]

image source credits:David Butler This anomalous speed rotation distribution of galaxies is today mainly contributed to Dark Matter. However, since a definitive experimental measurement and ...
Markoul11's user avatar
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2 votes
0 answers
49 views

Equivalence Principle Frame Dragging

Why do metric equations of a rotating body (like Kerr Metric for black holes or EFE solution for rotating bodies) contain a dt dphi term, leading to rotational frame dragging effects? Please don't ...
Nayeem1's user avatar
  • 1,161
3 votes
1 answer
102 views

Is there a possibility of frame dragging inside the event horizon?

Is there a possibility of frame dragging inside the event horizon? If frame dragging is related with gravity and space and as the black hole fills a space and produces a gravitational effect that ...
Janko Bradvica's user avatar
1 vote
1 answer
526 views

Does Earth's rotation affect the orbital velocity of its satellites?

We all know about the spin of black holes. That spin and of course it's gravity determines the minimum distance a star can orbit the black hole with a min orbital velocity. Do we see similar result? ...
bitsabhi's user avatar
  • 196
0 votes
1 answer
59 views

Does light travel same distance in same time not depending of the path orientation regarding Earth's surface?

Does light travel the same distance at the same time regardless of the path orientation? The light in the proximity of a gravitational source can bend its trajectory and frame-dragging can cause the ...
Krešimir Bradvica's user avatar
0 votes
0 answers
59 views

If a very massive object enters in a rotating black hole retrograde orbit should it slow down the black hole's spin?

If a very massive object is orbiting retrograde around a rotating black hole, would it slow down the black hole's spin? Of course, due to its interaction with the black hole's rotating frame, better ...
Krešimir Bradvica's user avatar
0 votes
1 answer
155 views

Is it true that frame-dragging (as applied to galactic rotation curves) goes as second order in $v/c$ rather than $(GM/Rc²)(v/R)$?

I have seen various people (see e.g. comments here) dismissing this article using the argument that GR frame-dragging is second order in $v/c$ and therefore insignificant because $v << c$ for ...
Kit Adams's user avatar
10 votes
4 answers
999 views

Does the twist of spacetime by a black hole increase over time?

From the Wikipedia page about Ergospheres: As a black hole rotates, it twists spacetime in the direction of the rotation... Does this "twisting up spacetime" add up over time in any ...
Brotcrunsher's user avatar
0 votes
1 answer
78 views

Can the curvature of space-time be also described as a 'frame' (space) whirlpool?

Can the curvature of space-time be also described as a 'frame' (space) wirlpool? When we talk about the Schwarzschild metric it can be immagined as a curved manifold but in the Kerr metric it seams ...
Janko Bradvica's user avatar
1 vote
0 answers
31 views

What is the relative importance of the Coriolis term to the precession term in frame dragging by rotating Kerr black holes?

The Wikipedia entry for Thirring precession describes the Coriolis term as separate from the precession term. Is it fair to say that when looking at the dynamics of a rotating black hole, the ...
Ralph Berger's user avatar
0 votes
1 answer
64 views

Does frame-dragging continuously strectch spacetime?

Frame-dragging deforms spacetime around a rotating spherical, isotropic distribution of matter (the distribution doesn't change in time). The spacetime is a little bit dragged away from the ...
Deschele Schilder's user avatar
0 votes
0 answers
27 views

The Sun bends planets' trajectory and speeds up it towards the perihelion; does it both actions with light? [duplicate]

The Sun bends planet's trajectory and speeds up it towards the perihelion; does it both actions with light? If it speeds up light too, then does it mean that gravity is a consequence of a vortex that ...
Janko Bradvica's user avatar
7 votes
1 answer
394 views

Is there linear 'frame dragging'?

Very massive objects cause the so called 'frame dragging' that can increase the speed of a beam of light to a total aggregate speed faster than the speed of light in normal circumstances so my ...
Janko Bradvica's user avatar
0 votes
0 answers
27 views

Can somebody describe the frame dragging around Sagittarius A at the center of our galaxy?

I need to be able to visualize it, specifically the number of turns and how it relates to the horizons in the black hole and what would happen to something falling in also described. Has anyone ever ...
Spiralsun1's user avatar
1 vote
1 answer
46 views

How do frame dragging affects a photon for outside observer?

I remember an analogy that explained this phenomenon using magnetic field, a charged particle will experience a force next to another spinning charged particle or something like that. But I don't want ...
user6760's user avatar
  • 13k
8 votes
2 answers
739 views

Has frame dragging been accounted for in galactic rotation curves?

This article explicitly takes frame dragging into account in calculating expected galactic rotation curves in the absence of dark matter, and appears to obtain very close matches to observed curves. ...
S. McGrew's user avatar
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0 votes
1 answer
110 views

Speciality of rotating black holes? [closed]

I have read that there are different properties of black hole which are rotating like, they drag the spacetime, with them. Also I read that they have kind of 'ergosphere' along with event horizon. ...
Kshitij Kumar's user avatar