Neptune's ring arcs |
Neptune's ring arcs |
Guest_PhilCo126_* |
May 11 2006, 09:35 PM
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#1
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I'm still amazed by the beauty of Neptune's ring arcs ... about time someone finds an explanation for those ?
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Guest_BruceMoomaw_* |
May 12 2006, 01:42 AM
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#2
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They're supposed to be entirely due to a complex interaction with a single one of Neptune's tiny inner moons, Larissa. I know virtually no details, but give me a little time and I'll dig up more on it (*sigh*).
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May 12 2006, 02:07 AM
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#3
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Solar System Cartographer Group: Members Posts: 10229 Joined: 5-April 05 From: Canada Member No.: 227 |
Galatea, Bruce:
Porco, C. C. 1991. An explanation for Neptune's ring arcs. Science 253, 995-1001. Abstract The Voyager mission revealed a complex system of rings and ring arcs around Neptune and uncovered six new satellites, four of which occupy orbits well inside the ring region. Analysis of Voyager data shows that a radial distortion with an amplitude of approximately 30 kilometers is traveling through the ring arcs, a perturbation attributable to the nearby satellite Galatea. Moreover, the arcs appear to be azimuthally confined by a resonant interaction with the same satellite, yielding a maximum spread in ring particle semimajor axes of 0.6 kilometer and a spread in forced eccentricities large enough to explain the arc's 15-kilometer radial widths. Additional ring arcs discovered in the course of this study give further support to this model. Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Guest_PhilCo126_* |
May 12 2006, 08:07 AM
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#4
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Thanks !
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Guest_BruceMoomaw_* |
May 12 2006, 11:17 AM
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#5
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Yep, Galatea...Sorry. (I plumb forgot that Larissa is one of Neptune's biggest moons...)
I've spent a while last night sifting through my stored Web documents on the Neptune system and found a few short items relating to both the rings arcs and the new theory about Tritan's capture -- but I haven't even gotten around to rereading them yet. More tomorrow, I hope. |
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