Biology
Scientific paper
Aug 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.496...55c&link_type=abstract
In: Exo-/astro-biology. Proceedings of the First European Workshop, 21 - 23 May 2001, ESRIN, Frascati, Italy. Eds.: P. Ehrenfreu
Biology
Cosmic Materials: Laboratory Simulations
Scientific paper
Information about the chemical and physical properties of materials present in space come from astronomical observations and in situ exploration of Solar System bodies. Depending on both local environment properties and on efficiency of processing agents (e.g., thermal annealing, UV irradiation, ion bombardment, gas-solid interactions) cosmic compounds behave differently. Laboratory experiments are aimed at producing materials whose properties can simulate species present in space. Several techniques are used to synthesise "analogues" of cosmic compounds under well controlled chemical and physical status. The study of optical properties, complemented by other analytical techniques, is a powerful method to investigate the products of synthesis. Moreover, experimental projects are aimed at simulating material evolution. The application of processes, similar to those active in space, provides information both on the reactivity of materials and on the efficiency of treatments. Such an approach provides quantitative information on how modifications, at chemical and structural level, occur both in organic and in refractory materials. In the present paper, we review some key properties and evolution of materials present in space, based also on the results of experimental work performed in laboratory. The discussed cases demonstrate the relevant role played by the laboratory approach. Thanks to the application of laboratory data it is possible to outline the real nature of cosmic materials and place constraints on their genesis and modifications, also in the view of a potential bio-genetic evolution.
Brucato John Robert
Colangeli Luigi
Mennella Vito
Palomba Ernesto
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