Irradiation of dust in molecular clouds. I. UV doses |
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| Authors: | A G Yeghikyan |
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| Institution: | (1) V. A. Ambartsumyan Byurakan Astrophysical Observatory, Byurakan, Armenia |
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| Abstract: | The radiation fluxes inside molecular clouds owing to a neighboring class A star or to isotropic interstellar irradiation
are calculated. Radiation within the interval 912 ? < λ < 2067 ? is found to penetrate deeply enough to ensure a radiation
dose for water ice on the order of 100 eV/amu or more over the lifetime of the clouds, whether a star formation region is
present or not. The possibility is discussed of using these results for an astrophysical interpretation of published data
from laboratory experiments on irradiation of ices of the type H2O:CH3OH:NH3:CO. The resulting radiation-chemical transformation of complex organic materials may play an important role in the prebiological
evolution of the dust component of molecular clouds.
Translated from Astrofizika, Vol. 52, No. 2, pp. 311–324 (May 2009). |
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| Keywords: | molecular clouds radiation field ices radiation doses |
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