HST observations of azimuthal asymmetry in Saturn's rings

Icarus

Volumn 189, Issue 2, 2007, Pages 493-522

  French, Richard G ^a   Salo, Heikki ^b   McGhee, Colleen A ^a   Dones, Luke ^c  

^a WELLESLEY COLLEGE   (United States)

^b UNIVERSITY OF OULU   (Finland)

^c SOUTHWEST RESEARCH INSTITUTE   (United States)

Author keywords

Planetary rings; Radiative transfer; Saturn

Indexed keywords

EID: 34447255891     PISSN: 00191035     EISSN: 10902643     Source Type: Journal    
DOI: 10.1016/j.icarus.2007.02.019     Document Type: Article

References (78)

1. Bridges F.G., Hatzes A., and Lin D.N.C. Structure, stability and evolution of Saturn's rings. Nature 309 (1984) 333-335
2. Camichel H. Mesures photométriques de Saturne et de son anneau. Ann. Astrophys. 21 (1958) 231-242
3. Colombo G., Goldreich P., and Harris A.W. Spiral structure as an explanation for the asymmetric brightness of Saturn's A ring. Nature 264 (1976) 344-345
4. Colwell J.E., Esposito L.W., and Sremčević M. Self-gravity wakes in Saturn's A ring measured by stellar occultations from Cassini. Geophys. Res. Lett. 33 (2006) 7201
5. Colwell, J.E., Esposito, L.W., Sremčević, M., McClintock, W.E., Stewart, G.R. 2007. Self-gravity wakes and radial structure of Saturn's B ring. Icarus, in press
6. Cuzzi J.N., French R.G., and Dones L. HST multicolor (255-1042 nm) photometry of Saturn's main rings. I. Radial profiles, phase and opening angle variations, and regional spectra. Icarus 158 (2002) 199-223
7. Daisaka H., and Ida S. Spatial structure and coherent motion in dense planetary rings induced by self-gravitational instability. Earth Planets Space 51 (1999) 1195-1213
8. Dones L., Cuzzi J.N., and Showalter M.R. Voyager photometry of Saturn's A ring. Icarus 105 (1993) 184-215
9. Dones L., and Porco C.C. Spiral density wakes in Saturn's A ring?. Bull. Am. Astron. Soc. 21 (1989) 929
10. Dunn D.E., Molnar L.A., and Fix J.D. More microwave observations of Saturn: Modeling the ring with a Monte Carlo radiative transfer code. Icarus 160 (2002) 132-160
11. Dunn D.E., Molnar L.A., Niehof J.T., de Pater I., and Lissauer J.L. Microwave observations of Saturn's rings: Anisotropy in directly transmitted and scattered saturnian thermal emission. Icarus 171 (2004) 183-198
12. Dunn D.E., de Pater I., Wright M., Hogerheijde M.R., and Molnar L.A. High-quality BIMA-OVRO images of Saturn and its rings at 1.3 and 3 millimeters. Astron. J. 129 (2005) 1109-1116
13. Ferrin I. On the structure of Saturn's rings and the "real" rotational period for the planet. Astrophys. Space Sci. 33 (1975) 453-457
14. Franklin F.A., and Colombo G. On the azimuthal brightness variations of Saturn's rings. Icarus 33 (1978) 279-287
15. Franklin F.A., Cook A.F., Barrey R.T.F., Roff C.A., Hunt G.E., and de Rueda H.B. Voyager observations of the azimuthal brightness variations in Saturn's rings. Icarus 69 (1987) 280-296
16. French R.G., and Nicholson P.D. Saturn's Rings. II. Particle sizes inferred from stellar occultation data. Icarus 145 (2000) 502-523
17. French R.G., Dones L., and Salo H. HST observations of the azimuthal brightness asymmetry in Saturn's rings. Bull. Am. Astron. Soc. 32 (2000) 864
18. French R.G., McGhee C.A., Dones L., and Lissauer J.J. Saturn's wayward shepherds: The peregrinations of Prometheus and Pandora. Icarus 162 (2003) 143-170
19. French R.G., McGhee C.A., Frey M., Hock R., Rounds S., Jacobson R., and Verbiscer A. Astrometry of Saturn's satellites from the Hubble Space Telescope WFPC2. Publ. Astron. Soc. Pacific 118 (2006) 246-259
20. Goldreich P., and Lynden-Bell D. II. Spiral arms as sheared gravitational instabilities. Mon. Not. R. Astron. Soc. 130 (1965) 125-158
21. Hedman M.M., Nicholson P.D., Salo H., Wallis B.D., Buratti B.J., Baines K.H., Brown R.H., and Clark R.N. Self-gravity wake structures in Saturn's A ring revealed by Cassini VIMS. Astron. J. 133 (2007) 2624-2629
22. Julian W.H., and Toomre A. Non-axisymmetric responses of differentially rotating disks of stars. Astrophys. J. 146 (1966) 810-830
23. Karjalainen R., and Salo H. Gravitational accretion of particles in Saturn's rings. Icarus 172 (2004) 328-348
24. Karttunen H. The wake model for azimuthal brightness variations in Saturn's A-ring. Moon Planets 29 (1983) 117-120
25. Lewis M.C., and Stewart G.R. Expectations for Cassini observations of ring material with nearby moons. Icarus 178 (2005) 124-143
26. Lissauer J.J., and French R.G. HST high-resolution backscatter image of Saturn's G ring. Icarus 146 (2000) 12-18
27. Lumme K. On photometric properties of Saturn's rings. Astrophys. Space Sci. 8 (1970) 90-101
28. Lumme K., Esposito L.W., Irvine W.M., and Baum W.A. Azimuthal brightness variations of Saturn's rings. II. Observations at an intermediate tilt angle. Astrophys. J. 216 (1977) L123-L126
29. Lumme K., and Irvine W.M. Azimuthal brightness variations of Saturn's rings. Astrophys. J. 204 (1976) L55-L57
30. Lumme K., and Irvine W.M. A model for the azimuthal brightness variations in Saturn's rings. Nature 282 (1979) 695-696
31. Lumme K., and Irvine W.M. Azimuthal brightness variations of Saturn's rings. III. Observations at tilt angle B approximately equal to 11.5 deg. Astrophys. J. 229 (1979) L109-L111
32. Marouf E.A., Tyler G.L., Zebker H.A., Simpson R.A., and Eshleman V.R. Particle size distributions in Saturn's rings from Voyager 1 radio occultation. Icarus 54 (1983) 189-211
33. Marouf E., French R., Rappaport N., McGhee C., Wong K., and Thomson F. Cassini radio occultation results for Saturn's rings. Eos (Fall Meet.) 86 52 (2005) Abstract P31D-04
34. Marouf E.A., French R.G., Rappaport N.J., McGhee C.A., Wong K., Thomson F.S., and Anabtawi A. Structure and properties of Saturn's ring B from Cassini radio occultations. Bull. Am. Astron. Soc. 38 (2006) Abstract 38.05
35. McGhee C.A., Nicholson P.D., French R.G., and Hall K.J. HST observations of saturnian satellites during the 1995 ring plane crossings. Icarus 152 (2001) 282-315
36. McGhee C.A., French R.G., Dones L., Cuzzi J.N., Salo H.J., and Danos R. HST observations of spokes in Saturn's B ring. Icarus 173 (2005) 508-521
37. Molnar L.A., Dunn D.E., and Niehof J.T. Fall 1998 Radio observations of Saturn's rings: New evidence of ring wakes. Bull. Am. Astron. Soc. 31 (1999) Abstract 44.05
38. Molnar L.A., Crull E.M., and Dunn D.E. A and B ring wakes in high dynamic range radio maps of Saturn. Bull. Am. Astron. Soc. 36 (2004) 1917
39. Nicholson P., French R.G., Campbell D.B., Margot J.-L., Nolan M.C., Black G.J., and Salo H. Radar imaging of Saturn's rings. Icarus 177 (2005) 32-62
40. Nicholson P.D., Hedman M.M., Wallis B., and Cassini VIMS Team. Cassini-VIMS observations of stellar occultations by Saturn's rings. Bull. Am. Astron. Soc. 37 (2005) 763
41. Ohtsuki K., and Emori H. Local N-body simulations for the distribution and evolution of particle velocities in planetary rings. Astron. J. 119 (2000) 403-416
42. Pérez-Hoyos S., Sánchez-Lavega A., French R.G., and Rojas J.F. Saturn's cloud structure and temporal evolution from ten years of Hubble Space Telescope images (1994-2003). Icarus 176 (2005) 155-174
43. Porco C.C., Throop H.B., and Richardson D.C. Light scattering in Saturn's rings: Basic disk properties and the A ring azimuthal asymmetry. Bull. Am. Astron. Soc. 33 (2001) 1091-1092
44. Porco C.C., and 34 colleagues. Cassini imaging science: Initial results on Saturn's rings and small satellites. Science 307 (2005) 1226-1236
45. Poulet F., Cuzzi J.N., French R.G., and Dones L. A study of Saturn's ring phase curves from HST observations. Icarus 158 (2002) 224-248
46. Price M.J. Optical scattering properties of Saturn's rings. Astron. J. 78 (1973) 113-120
47. Reitsema H.J., Beebe R.F., and Smith B.A. Azimuthal brightness variations in Saturn's rings. Astron. J. 81 (1976) 209-215
48. Richardson D.C. Tree code simulations of planetary rings. Mon. Not. R. Astron. Soc. 269 (1994) 493-511
49. Rosen P.A., Tyler G.L., and Marouf E.A. Resonance structures in Saturn's rings probed by radio occultation. I. Methods and examples. Icarus 93 (1991) 3-24
50. Salo H. Gravitational wakes in Saturn's rings. Nature 359 (1992) 619-621
51. Salo H. Simulations of dense planetary rings. III. Self-gravitating identical particles. Icarus 117 (1995) 287-312
52. Salo H., and Karjalainen R. Dynamical and photometric modeling of azimuthal brightness asymmetry in Saturn's rings. Bull. Am. Astron. Soc. 31 (1999) 1160
53. Salo H., and Karjalainen R. Photometric modeling of Saturn's rings. I. Monte Carlo method and the effect of non-zero volume filling factor. Icarus 164 (2003) 428-460
54. Salo H., Karjalainen R., and French R.G. Modeling the azimuthal brightness asymmetry in Saturn's rings. Bull. Am. Astron. Soc. 32 (2000) 864
55. Salo H., Schmidt J., and Spahn F. Viscous overstability in Saturn's B-ring. I. Direct simulations and measurement of transport coefficients. Icarus 153 (2001) 295-315
56. Salo H., Karjalainen R., and French R.G. Photometric modeling of Saturn's rings. II. Azimuthal asymmetry in reflected and transmitted light. Icarus 170 (2004) 70-90
57. Sánchez-Lavega A., Pérez-Hoyos S., Acarreta J.R., and French R.G. No hexagonal wave around Saturn's southern pole. Icarus 160 (2002) 216-219
58. Sánchez-Lavega A., Pérez-Hoyos S., Rojas J.F., Hueso R., and French R.G. A strong decrease in Saturn's equatorial jet at cloud level. Nature 423 (2003) 623-625
59. Sánchez-Lavega A., Hueso R., Pérez-Hoyos S., Rojas J.F., and French R.G. Saturn's cloud morphology and zonal winds before the Cassini encounter. Icarus 170 (2004) 519-523
60. Schmidt J., and Salo H. Weakly non-linear model for oscillatory instability in Saturn's dense rings. Phys. Rev. Lett. 90 (2003) 061102
61. Schmit U., and Tscharnuter W. A fluid dynamical treatment of the common action of self-gravitation, collisions, and rotation in Saturn's B-ring. Icarus 115 (1995) 304-319
62. Schmidt J., Salo H., Spahn F., and Petzschmann O. Viscous overstability in Saturn's B-Ring. II. Hydrodynamic theory and comparison to simulations. Icarus 153 (2001) 316-331
63. Seiß M., Spahn F., Sremčević M., and Salo H. Structures induced by small moonlets in Saturn's rings: Implications for the Cassini Mission. Geophys. Res. Lett. 32 (2005) 11205
64. Showalter M.R., and Nicholson P.D. Saturn's rings through a microscope-Particle size constraints from the Voyager PPS scan. Icarus 87 (1990) 285-306
65. Showalter M.R., Bollinger K.J., Nicholson P.D., and Cuzzi J.N. The rings node for the planetary data system. Planet. Space Sci. 44 (1996) 33-45
66. Thompson, W.T., 1982. The swarm model for the azimuthal brightness variations in Saturn's ring A. Ph.D. thesis. Univ. of Massachusetts, Amherst
67. Thompson W.T., Lumme K., Irvine W.M., Baum W.A., and Esposito L.W. Saturn's rings-Azimuthal variations, phase curves, and radial profiles in four colors. Icarus 46 (1981) 187-200
68. Thomson, F., Wong, K., Marouf, E., Rappaport, N., French, R., McGhee, C., 2005. Scattered signal observations during Cassini radio occultations by Saturn's rings. In: AGU Fall Meeting Abstracts, P33B-0247
69. Tiscareno M.S., Burns J.A., Hedman M.M., Porco C.C., Weiss J.W., Dones L., Richardson D.C., and Murray C.D. 100-metre-diameter moonlets in Saturn's A ring from observations of 'propeller' structures. Nature 440 (2006) 648-650
70. Toomre A. On the gravitational stability of a disk of stars. Astrophys. J. 139 (1964) 1217-1238
71. Toomre A. What amplifies the spirals. In: Fall M., and Lynden-Bell D. (Eds). Structure and Evolution of Normal Galaxies (1981), Cambridge Univ. Press, Cambridge, UK 111-136
72. Toomre A., and Kalnajs A.J. Spiral chaos in an orbital patch. In: Sundelius B. (Ed). Dynamics of Disc Galaxies (1991), Almquist-Wiksell, Göteborg 341-358
73. Trauger J.T., Vaughan R.W., Evans R.W., and Moody D.C. Geometry of the WFPC2 focal plane. In: Koratkar A., and Leitherer C. (Eds). Calibrating Hubble Space Telescope: Post Servicing Mission (1995), Space Telescope Science Institute, Baltimore, MD 379-385
74. van der Tak F.E., de Pater I., Silva A., and Millan R. Time variability in the radio brightness distribution of Saturn. Icarus 142 (1999) 125-147
75. Verbiscer A.J., French R.G., and McGhee C.A. The opposition surge of Enceladus: HST observations 338-1022 nm. Icarus 173 (2005) 66-83
76. Weidenschilling S.J., Chapman C.R., Davis D.R., and Greenberg R. Ring particles-Collisional interactions and physical nature. Planetary Rings. IAU Colloq. 75 (1984), CEPADUES-Editions 367-415
77. Wisdom J., and Tremaine S. Local simulations of planetary rings. Astron. J. 95 (1988) 925-940
78. Wong, K.K., Marouf, E.A., 2004. Cassini radio occultation of Saturn's rings: A Bayesian approach to particle size distribution recovery. In: AGU Fall Meeting Abstracts, A1457