E-viri
Recenzirano
-
Esposito, Larry W; Colwell, Joshua E; Larsen, Kristopher; McClintock, William E; Stewart, A. Ian F; Hallett, Janet Tew; Shemansky, Donald E; Ajello, Joseph M; Hansen, Candice J; Hendrix, Amanda R; West, Robert A; Keller, H. Uwe; Korth, Axel; Pryor, Wayne R; Reulke, Ralf; Yung, Yuk L
Science (American Association for the Advancement of Science), 02/2005, Letnik: 307, Številka: 5713Journal Article
Neutral oxygen in the saturnian system shows variability, and the total number of oxygen atoms peaks at 4 x 10³⁴. Saturn's aurora brightens in response to solar-wind forcing, and the auroral spectrum resembles Jupiter's. Phoebe's surface shows variable water-ice content, and the data indicate it originated in the outer solar system. Saturn's rings also show variable water abundance, with the purest ice in the outermost A ring. This radial variation is consistent with initially pure water ice bombarded by meteors, but smaller radial structures may indicate collisional transport and recent renewal events in the past 10⁷ to 10⁸ years.
