Mantle Dynamics of Super-Earth Extrasolar Planet under Extreme Temperature and Pressure Conditions Extreme Temperature and Pressure conditions

Details Mantle Dynamics of Super-Earth Extrasolar Planet under Extreme Temperature and Pressure Conditions Extreme Temperature and Pressure conditions Mantle Dynamics of Super-Earth Extrasolar Planet under Extreme Temperature and Pressure Conditions Extreme Temperature and Pressure conditions

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmmr23b0061v&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #MR23B-0061

Physics

1729 Planetology, 1744 Tectonophysics

Scientific paper

The recent discovery of an extrasolar planet with a mass 7.5 times that of the Earth has opened up new possibilities for planetary modelling because of the higher temperature T ( up to around 10,000 K ) and greater pressures P( up to 1,000 MPa ) involved. We have modelled the dynamics of this planet under these extreme conditions with an extended Boussinesq approximation , using a cartesian 2-D model. Rayleigh numbers of the order of 10**7 have been considered.Both the spinel to perovskite and perovskite to post-perovskite phase transitions have been accounted for, as well as temperature-dependent thermal conductivity, where the phonon, photon and electron thermal conductivities have been included because of the high T and P conditions. A strongly decreasing thermal expansivity for post-perovskite phase , varying by a factor of 20 across the super-earth mantle, has been included. These results reveal a tremendous difference in the style of mantle convection between constant and thermal conductivity models, all other parameters being kept the same. Temperature-dependent thermal conductivity, especially that of electron carriers, helps to develop obese plumes, even in the presence of a small value of thermal expansivity in the deep mantle, whereas weak convection is developed at the base of the mantle with constant thermal conductivity.

Affiliated with

Also associated with

No associations

Rating

Mantle Dynamics of Super-Earth Extrasolar Planet under Extreme Temperature and Pressure Conditions Extreme Temperature and Pressure conditions 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 Mantle Dynamics of Super-Earth Extrasolar Planet under Extreme Temperature and Pressure Conditions Extreme Temperature and Pressure conditions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mantle Dynamics of Super-Earth Extrasolar Planet under Extreme Temperature and Pressure Conditions Extreme Temperature and Pressure conditions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-752116