Computational study of radiation chemical processing in comet nuclei

Details Computational study of radiation chemical processing in comet nuclei Computational study of radiation chemical processing in comet nuclei

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991oleb...21..359n&link_type=abstract

Origins of Life and Evolution of the Biosphere, Volume 21, Issue 5-6, pp. 359-374

Biology

Quantitative Biology

Biomolecules

3

Scientific paper

Cometary nuclei have been exposed to high levels of ionizing radiation since their formation. We present here some results of a computer model calculation of the effect of ionizing radiation on cometary material. The external (cosmic rays) and internal (embedded radionuclides) contributions in the processing of cometary nuclei are considered. As a first approximation we have used the available kinetic data of the liquid water system to model the radiation effects in a frozen cometary environment. Out data suggest that massive radiation chemical processing due to cosmic rays may have taken place only in the outer layers of comets. The internal contribution of radionuclides to the radiation processing of comet cores seems to be modest. Therefore, comets could be carriers of intact homochiral biomolecules.

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