skip to main content
Idioma:
Tipo de recurso Mostra resultados com: Mostra resultados com: Índice

Effect of Enceladus's rapid synchronous spin on interpretation of Cassini gravity

McKinnon, William B.

Geophysical research letters, 2015-04, Vol.42 (7), p.2137-2143 [Periódico revisado por pares]

Washington: Blackwell Publishing Ltd

Texto completo disponível

Citações Citado por
  • Título:
    Effect of Enceladus's rapid synchronous spin on interpretation of Cassini gravity
  • Autor: McKinnon, William B.
  • Assuntos: Cassini mission ; Compensation ; Compensation depth ; Depth ; Distortion ; Enceladus ; Enceladus ocean ; Floating ice ; Gravitation ; Gravity ; gravity model ; Hydrostatics ; Ice ; Ice cover ; icy satellite ; Isostasy ; Marine ; Mathematical models ; Satellites ; Shape ; Shells ; Solvents ; Terrain ; Thickness ; Tides ; Water depth ; Water scarcity
  • É parte de: Geophysical research letters, 2015-04, Vol.42 (7), p.2137-2143
  • Notas: istex:993E8F04929723B30EA1E1222365B66C3089A142
    ark:/67375/WNG-DRF4TT82-Q
    Cassini Data Analysis Program - No. NNX11AK76G
    Text S1 and Table S1
    ArticleID:GRL52776
    ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: Enceladus's degree 2 gravity, determined by Cassini, is nominally nonhydrostatic to 3σ (J2/C22 = 3.38–3.63, as opposed to 10/3). Iess et al. (2014) interpret this in terms of a hydrostatic interior (core) and isostatic (not hydrostatic) floating ice shell. Enceladus's rapid (1.37 d) synchronous spin and tide distorts its shape substantially, though, enough that the predicted hydrostatic J2/C22 is not 10/3 but closer to 3.25. This leads to the following revision to the internal picture of Enceladus, compared with Iess et al.: (1) the satellite's core is somewhat smaller and slightly denser (190 km radius and 2450 kg/m3); (2) the compensation depth (shell thickness) of the global (degree 2) ice shell is ≈ 50 km, rather close to the base of the modeled ice + water layer; and (3) the compensation depth (shell thickness) beneath the South Polar Terrain (from J3) remains shallower (thinner) at ≈ 30 km, independent of but influenced by the degree 2 solution. Key Points Enceladus' rapid spin requires higher‐order theory for degree 2 gravity and shape Cassini gravity and shape imply a global ocean nearly but not completely frozen Ice shell much thinner over the South Polar Terrain facilitating plume venting
  • Editor: Washington: Blackwell Publishing Ltd
  • Idioma: Inglês
Voltar para lista de resultados

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.