Gravity field and internal structure of mercury from MESSENGER

  • Smith D
  • Zuber M
  • Phillips R
 et al. 
  • 112

    Readers

    Mendeley users who have this article in their library.
  • 143

    Citations

    Citations of this article.

Abstract

Radio tracking of the MESSENGER spacecraft has provided a model of Mercury's gravity field. In the northern hemisphere, several large gravity anomalies, including candidate mass concentrations (mascons), exceed 100 milli-Galileos (mgal). Mercury's northern hemisphere crust is thicker at low latitudes and thinner in the polar region and shows evidence for thinning beneath some impact basins. The low-degree gravity field, combined with planetary spin parameters, yields the moment of inertia C/MR2 = 0.353 +/- 0.017, where M and R are Mercury's mass and radius, and a ratio of the moment of inertia of Mercury's solid outer shell to that of the planet of C-m/C = 0.452 +/- 0.035. A model for Mercury's radial density distribution consistent with these results includes a solid silicate crust and mantle overlying a solid iron-sulfide layer and an iron-rich liquid outer core and perhaps a solid inner core.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

  • Steven HauckCase Western Reserve University

    Follow
  • David E. Smith

  • Maria T. Zuber

  • Roger J. Phillips

  • Sean C. Solomon

  • Frank G. Lemoine

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free