Ceres: Evoltion and Present State #2

Details Ceres: Evoltion and Present State #2 Ceres: Evoltion and Present State #2

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufm.p51a1173m&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #P51A-1173

Physics

5455 Origin And Evolution

Scientific paper

The evolution of Ceres has been modeled (McCord and Sotin, 2005) and shown to predict that Ceres contained considerable water when formed, differentiated to form a hydrated silicate core, water mantle and frozen crust. The presence of water was shown to be critical to moderate the heating. The difference between the current day Vesta and Ceres was explained to depend on the exact time after CAIs that each object formed: early formation meant stronger short-lived radioactive nuclide (SLRN) heating and early loss of water, resulting in a much hotter object, like Vesta. One of the most likely models predicted a moment of inertia (MOI) that was later measured for Ceres (Thomas et al., 2005), confirming that Ceres is differentiated. We have improved on this early modeling attempt in a number of ways. Our results confirm the basic evolution scenario found earlier but show additional interesting aspects, and investigate some major processes, such as convection, mineralization, water loss, and processes taking place in the core: dehydration, magmatic activity, and possible separation of the metallic phase. We derive a series of models, requiring that they match both the shape data and are realistic from a thermal evolution perspective. These models bear a core stratified in hydrated, dehydrated silicate layers, and in some cases a metallic inner core. They all require a time of formation with respect to calcium-aluminum inclusions shorter than 5 My. McCord T. B. and C. Sotin (2005) J. Geophys. Res. Vol. 110. Thomas, P. C. et al. (2005) Nature 437, doi:10- 1038, 1-3. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract to NASA.

Affiliated with

Also associated with

No associations

Rating

Ceres: Evoltion and Present State #2 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Ceres: Evoltion and Present State #2, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ceres: Evoltion and Present State #2 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-962313