UV and Space Exposure of Aromatic Compounds on the EXPOSE-R Facility Onboard the International Space Station

Details UV and Space Exposure of Aromatic Compounds on the EXPOSE-R Facility Onboard the International Space Station UV and Space Exposure of Aromatic Compounds on the EXPOSE-R Facility Onboard the International Space Station

May 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21641106b&link_type=abstract

American Astronomical Society, AAS Meeting #216, #411.06; Bulletin of the American Astronomical Society, Vol. 41, p.820

Astronomy and Astrophysics

Astronomy

Scientific paper

Aromatic networks are likely the most abundant organic material in space. Specifically, polycyclic aromatic hydrocarbons (PAHs) and fullerenes have been identified in meteorites and are thought to be among the carriers for numerous astronomical absorption and emission features. Thin films of selected PAHs and fullerenes are being subjected to the low Earth orbit environment as part of the Organics experiment on the multi-user facility EXPOSE-R, which has been deployed onboard the International Space Station since March 2009 and will be retrieved in Fall 2010. The Organics experiment monitors the chemical evolution, survival, destruction, and chemical modification of PAHs and fullerenes exposed to solar illumination and cosmic radiation. The radiation dose that is collected by the samples during flight exceeds the limits of simulations in the laboratory and will greatly enhance our knowledge on the evolution of large molecules in space environments. Dark samples are shielded from the UV photons and will enable us to differentiate between the effects of exposure to photons and cosmic rays. The samples are monitored before and after space exposure. We present spectra measured in the UV-Vis-NIR range of ground control samples and flight samples.

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