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Properties and dynamics of Jupiter's gossamer rings from Galileo, Voyager, Hubble and Keck images


Showalter, Mark; de Pater, Imke; Verbanac, Giuliana; Hamilton, Douglas; Burns, Joseph
Properties and dynamics of Jupiter's gossamer rings from Galileo, Voyager, Hubble and Keck images // Icarus, 195 (2008), 1; 361-377 doi:10.1016/j.icarus.2007.12.012 (međunarodna recenzija, članak, znanstveni)


Naslov
Properties and dynamics of Jupiter's gossamer rings from Galileo, Voyager, Hubble and Keck images

Autori
Showalter, Mark ; de Pater, Imke ; Verbanac, Giuliana ; Hamilton, Douglas ; Burns, Joseph

Izvornik
Icarus (0019-1035) 195 (2008), 1; 361-377

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Planetary rings; Jupiter; rings; Hubble Space Telescope observations; Planetary dynamics; Photometry

Sažetak
We present a comprehensive examination of Jupiter's “ gossamer” rings based on images from Voyager, Galileo, the Hubble Space Telescope and the W.M. Keck Telescope. We compare our results to the simple dynamical model of Burns et al. [Burns, J.A., Showalter, M.R., Hamilton, D.P., Nicholson, P.D., de Pater, I., Ockert-Bell, M., Thomas, P., 1999. Science 284, 1146– 1150] in which dust is ejected from Amalthea and Thebe and then evolves inward under Poynting– Robertson drag. The ring follows many predictions of the model rather well, including a linear reduction in thickness with decreasing radius. However, some deviations from the model are noted. For example, additional material appears to be concentrated just interior to the orbits of the two moons. At least in the case of Amalthea's ring, that material is in the same orbital plane as Amalthea's inclined orbit and may be trapped at the Lagrange points. Thebe's ring shows much larger vertical excursions from the model, which may be related to perturbations by several strong Lorentz resonances. Photometry is consistent with the dust obeying a relatively flat power-law size distribution, very similar to dust in the main ring. However, the very low backscatter reflectivity of the ring, and the flat phase curve of the ring at low phase angles, require that the ring be composed of distinctly non-spherical particles.

Izvorni jezik
Engleski

Znanstvena područja
Geologija



POVEZANOST RADA


Projekt / tema
119-1193086-1314 - Istraživanje geomagnetskog polja i nehomogenosti litosfere u području Hrvatske (Davorka Herak, )

Ustanove
Prirodoslovno-matematički fakultet, Zagreb

Autor s matičnim brojem:
Giuliana Verbanac, (255244)

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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