Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978icar...33..514o&link_type=abstract
Icarus, vol. 33, Mar. 1978, p. 514-528.
Astronomy and Astrophysics
Astronomy
16
Astronomical Models, Mars (Planet), Planetary Composition, Planetary Structure, Seismology, Planetary Cores, Planetary Magnetic Fields, Planetary Quakes, Mars, Seismology, Models, Seismic Profiles, Mantle, Core, Physical Properties, Carbonaceous Chondrites, Composition
Scientific paper
Theoretical seismic properties of the planet Mars are investigated on the basis of the various models which have been proposed for the internal composition of the planet. The latest interpretation of gravity-field data, assuming a lower value of the moment of inertia, would require a less dense mantle and a larger core than previous models. If Mars is chondritic in composition, the most reasonable models are an incompletely differentiated H-chondrite or a mixture of H-chondrites and carbonaceous chondrites. Seismic profiles, travel times, and free oscillation periods are computed for various models, with the aim of establishing which seismic data is crucial for deciding among the alternatives. A detailed discussion is given of the seismic properties which could - in principle - help answer the questions of whether Mars' core is liquid or solid and whether Mars has a partially molten asthenosphere in its upper mantle.
Anderson David L.
Okal Emile A.
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