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Table 1 Parameters of the interior structure

From: Iron snow, crystal floats, and inner-core growth: modes of core solidification and implications for dynamos in terrestrial planets and moons

 

Earth

Moon

Mercury

Mars

Ganymede

Planetary radius (km)

6371a

1737b

2439c

3389d,e

2632f

Surface gravity (m s−2)

9.8a

1.6a

3.7a

3.7a

1.4a

Core radius (km)

2890a

250–430b

1965–2050g,h

1370–1870d,e

650–880f

R c /R p

0.45a

0.14–0.25b

0.8–0.84g,h

0.4–0.55d,e

0.25–0.33f

P cm (GPa)

139a

4.5–5i

2.8–3.3h

20–25d,e

5.5–7f

P c (GPa)

357a

5–6i

33–37h

38–42d,e

9.5–11f

Gravity at CMB (m s−2)

10.3a

0.7b

4h

3d,e

1.3f

  1. Parameters of the interior structure for the Moon, Mercury, Mars, and Ganymede. Earth is included for comparison
  2. R c/R p is the relative core radius, P cm is the density at the core–mantle boundary, P c is the central pressure
  3. aLodders and Fegley (1998)
  4. bSohl and Schubert (2007)
  5. cAnderson et al. (1987)
  6. dSohl and Spohn (1997)
  7. eSohl et al. (2005)
  8. fSohl et al. (2002)
  9. gHauck et al. (2013)
  10. hRivoldini and Van Hoolst (2013)
  11. iSohl et al. (2009)