On the Modification of Structure of Cometary Nuclei by the Transport of Super-Volatiles

Details On the Modification of Structure of Cometary Nuclei by the Transport of Super-Volatiles On the Modification of Structure of Cometary Nuclei by the Transport of Super-Volatiles

Jun 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996em%26p...73..215y&link_type=abstract

Earth, Moon and Planets, Volume 73, Issue 3, pp.215-220

Physics

Thermal Processes, Comets General

Scientific paper

Earlier, a study has been made of the transport mechanism of volatile molecules such as N2 and CO through cometary nuclei as they are heated by radioactive elements. Coupled equations of heat and gas transport in the presence of gas sublimation and recondensation, as well as a heat source, were numerically solved. And it was shown that supervolatiles such as N2 and CO are transported through the pores of the nucleus, and consequently the volatile molecules become more abundant near the surface than deep inside the nucleus. Here, the process is investigated for a wider range of paramaters such as porosity and nuclear radius. It is shown that provided the central temperature attains the sublimation point of the super-volatiles, they are transported toward the surface regardless of the values of the parameters.

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