Other
Scientific paper
Aug 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003basbr..23..210t&link_type=abstract
Boletim da Sociedade Astronômica Brasileira (ISSN 0101-3440), vol.23, no.1, p. 210-210
Other
Scientific paper
It is consensus that the Neptune ring arcs are confined by the 42/43 Lindblad-corotation orbit-orbit resonant interactions with Galatea. Nevertheless, recent observations have indicated that the radial position of the arcs is off the expected resonance location by 1/3 Km outwards. Such radial offset, although very small, is unaccountable by fine tuning the restricted three-body model. In an attempt to resolve this issue, we use a restricted four-body model where the center of mass is anchored by the central body Neptune S and the primary body Triton X. Two minor bodies Galatea G and ring arc s interact with each other while orbiting under the combined XS field. In order to identify the disturbing potential, the equations of motion of s are manipulated to arrive at the energy equation in a frame centered at S with a fixed reference axis. Due to the orbital motions of X and G, the force field acting on s is non-conservative with velocity and time dependences. This non-conservative field is represented in the energy equation in two ways. First, it appears as the energy exchange terms of s with X and G on the right side of the equation. Second, it appears in the potential function on the left side of the equation in a velocity dependent term, which could be removed by going to the SX rotating frame. Rearranging the non-conservative term in the potential function and the sX energy exchange terms gives an angular momentum term of s acted on by a time derivative. This regrouped term can be expressed in terms of the usual disturbing potential V itself multiplied by a coefficient q and becomes conservative. Consequently, the disturbing potential of s read Vs = (1+q)V, and by the same token, we have VG = (1+q)V. The (1+q) factor in Vs represents the effect of the anchoring Triton X on the sG interaction. As a matter of fact, this factor can also be recovered in the restricted three-body system, but has been overlooked so far. With Vs and VG, the resonance relations are preserved while the resonance location is displaced outward due to the additional contribution of X to the corotation secular potential of G that amounts to 0.3 Km.
No associations
LandOfFree
The outward radial offset of neptune ring arcs 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 The outward radial offset of neptune ring arcs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The outward radial offset of neptune ring arcs will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1665887