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Constraining Saturn's Core Properties by a Measurement of Its Moment of Inertia—Implications to the Cassini Solstice Mission

Helled, R

Astrophysical journal. Letters, 2011-07, Vol.735 (1), p.L16-jQuery1323917017145='48' [Periódico revisado por pares]

United States: IOP Publishing

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  • Título:
    Constraining Saturn's Core Properties by a Measurement of Its Moment of Inertia—Implications to the Cassini Solstice Mission
  • Autor: Helled, R
  • Assuntos: ANGULAR MOMENTUM ; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ; MOMENT OF INERTIA ; MOTION ; NUCLEAR PHYSICS AND RADIATION PHYSICS ; PLANETS ; PRECESSION ; ROTATION ; SATURN PLANET
  • É parte de: Astrophysical journal. Letters, 2011-07, Vol.735 (1), p.L16-jQuery1323917017145='48'
  • Notas: ObjectType-Article-2
    SourceType-Scholarly Journals-1
    ObjectType-Feature-1
    content type line 23
  • Descrição: Knowledge of Saturn's axial moment of inertia can provide valuable information on its internal structure. We suggest that Saturn's angular momentum may be determined by the Solstice Mission (Cassini XXM) by measuring Saturn's pole precession rate and the Lense-Thirring acceleration on the spacecraft, and therefore put constraints on Saturn's moment of inertia. It is shown that Saturn's moment of inertia can change up to ~2% due to different core properties. However, a determination of Saturn's rotation rate is required to constrain its axial moment of inertia. A change of about seven minutes in rotation period leads to a similar uncertainty in the moment of inertia value as different core properties (mass, radius). A determination of Saturn's angular momentum and rotation period by the Solstice Mission could reveal important information on Saturn's internal structure, in particular, its core properties.
  • Editor: United States: IOP Publishing
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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