- #1
- 1,232
- 917
- TL;DR Summary
- From Kepler's Second Law, it is expected that the rotation velocities will decrease with distance from the center of a Galaxy, similar to the Solar System. This is not observed. Can this be explained with rotational frame-dragging (the Lense–Thirring effect)?
The speed of the ends of the galaxies is higher than what it should be. Current solution: This could be explained by hypothetical "dark matter", which was not found up to now, or by a MOND theory (MOdified Newtonian Dynamics).
Can this be explained instead with rotational frame-dragging (Lense–Thirring effect) by the rotating Galaxy?
This is suggested in the following paper:
https://arxiv.org/ftp/arxiv/papers/1503/1503.07440.pdf
Can this be explained instead with rotational frame-dragging (Lense–Thirring effect) by the rotating Galaxy?
This is suggested in the following paper:
Source:In our study, we will try a third way of explanation of these discrepancies. This explanation doesn’t modify the quantities of observed matter and doesn’t modify general relativity. To demonstrate the capacity of the general relativity to explain dark matter, we are going to use, in our paper, the native metric of linearized general relativity (also called gravitoelectromagnetism) in agreement with the expected domain of validity of our study ... It doesn’t modify the gravity field of Newtonian approximation but defines a better approximation by adding a component (called gravitic field, similar to magnetic field of Maxwell idealization) correcting some imperfections of the Newtonian idealization (in particular the infinite propagation speed of gravitation). ... The only assumption that will be made in this paper is that there are some large astrophysical structures that can generate a significant value of gravitic field. And we will see that the galaxies’ cluster can generate it.
https://arxiv.org/ftp/arxiv/papers/1503/1503.07440.pdf