On liquid phases in cometary nuclei

Details On liquid phases in cometary nuclei On liquid phases in cometary nuclei

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf..183m&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.183

Computer Science

Scientific paper

We predict the occurrence of aqueous and hydrocarbon liquid phases in subsurface regions of comet nuclei dependent on heliocentric distance. Microporosity and the formation of a stabilization layer in the near-surface are prerequisites for liquid phase formation. Characteristics favoring subsurface melting are discussed including pore-size distribution, chemical composition, rotation rate and diurnal heating/cooling effects. Subsurface melting is expected to produce wetted layers of considerable strength and associated topographical changes. An important feature of this wetted-layer model is the predicted compositional variation with depth within the layer. Gas-liquid transport within such melt zones can induce major cometary outbursts. Implications for the formation of liquid-water environments in small bodies within protoplanetary disks are discussed.

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