Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-10-12
Int.J.Mod.Phys.A22:2293-2325,2007
Astronomy and Astrophysics
Astrophysics
35 pages, 13 figures
Scientific paper
10.1142/S0217751X0703666X
We consider the consequences of applying general relativity to the description of the dynamics of a galaxy, given the observed flattened rotation curves. The galaxy is modeled as a stationary axially symmetric pressure-free fluid. In spite of the weak gravitational field and the non-relativistic source velocities, the mathematical system is still seen to be non-linear. It is shown that the rotation curves for various galaxies as examples are consistent with the mass density distributions of the visible matter within essentially flattened disks. This obviates the need for a massive halo of exotic dark matter. We determine that the mass density for the luminous threshold as tracked in the radial direction is $10^{-21.75}$ kg$\cdot$m$^{-3}$ for these galaxies and conjecture that this will be the case for other galaxies yet to be analyzed. We present a velocity dispersion test to determine the extent, if of any significance, of matter that may lie beyond the visible/HI region. Various comments and criticisms from colleagues are addressed.
Cooperstock Fred I.
Tieu S.
No associations
LandOfFree
Galactic Dynamics via General Relativity: A Compilation and New Developments does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Galactic Dynamics via General Relativity: A Compilation and New Developments, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Galactic Dynamics via General Relativity: A Compilation and New Developments will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-442534