Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2009-11-18
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
7 pages, 6 figures
Scientific paper
In the context of Modified Newtonian Dynamics (MOND), we study how perturbation of a spherically symmetric system would affect the gravitational field. In particular, we study systems of perturbed and unperturbed spherical shells. For a single perturbed shell, we show that the field inside the shell is much smaller than what would be expected from a naive scaling formula. The strength of the perturbation field within the shell is screened by the spherically symmetric component of the mass, and is reduced as the spherically symmetric component is increased. For a two-shell system, we again show that the perturbed field is screened by the shells, no matter which shell's mass distribution is perturbed. The field within the inner shell is most suppressed when the inner and outer shells coincide. However, for a very light inner shell, the perturbation to the field can be enhanced. The enhancement is typically larger for smaller inner shells, and the perturbed field can be amplified by almost a factor of 2. The relevance to the effect of external fields on galaxy dynamics is discussed.
Matsuo Reijiro
Starkman Glenn
No associations
LandOfFree
Screening and Antiscreening of the MOND field in Perturbed Spherical Systems 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 Screening and Antiscreening of the MOND field in Perturbed Spherical Systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Screening and Antiscreening of the MOND field in Perturbed Spherical Systems will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-452091