Artigo
Analysing the new Saturnian rings, R/2004 S1 and R/2004 S2
Fecha
2005-12-01Registro en:
Earth Moon and Planets. Dordrecht: Springer, v. 97, n. 3-4, p. 189-201, 2005.
0167-9295
10.1007/s11038-006-9082-x
WOS:000241128100003
9224861533404236
Autor
Universidade Estadual Paulista (Unesp)
Resumen
The Cassini-Huygens arrival into the Saturnian system brought a large amount of data about the satellites and rings. Two diffuse rings were found in the region between the A ring and Prometheus. R/2004 S1 is coorbital to Atlas and R/2004 S2 is close to Prometheus. In this work we analysed the closest approach between Prometheus and both rings. As a result we found that the satellite removes particles from R/2004 S2 ring. Long-term numerical simulations showed that some particles can cross the F ring region . The well known region of the F ring, where small satellites are present and particles are being taking from the ring, gains a new insight with the presence of particles from R/2004 S2 ring. The computation of the Lyapunov Characteristic Exponent reveled that the R/2004 S2 ring lies in a chaotic region while R/2004 S1 ring and Atlas are in a stable region. Atlas is responsible for the formation of three regimes in the R/2004 S1 ring, as expected for a satellite embedded in a ring.