Carbon monoxide retained by carbon dioxide ice

Details Carbon monoxide retained by carbon dioxide ice Carbon monoxide retained by carbon dioxide ice

Nov 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011hsa6.conf..626l&link_type=abstract

Highlights of Spanish Astrophysics VI, Proceedings of the IX Scientific Meeting of the Spanish Astronomical Society (SEA), held

Astronomy and Astrophysics

Astrophysics

Scientific paper

Carbon monoxide is one of the most abundant molecules in astrophysical environments, both in solid state as well as in gas state. The balance between these two phases influences the chemical and physical evolution of such an environments. In the literature, it is very usual using as sublimation temperature those one in which pure CO is released to a certain atmosphere. However, some authors have put in evidence that CO also desorbs at higher temperatures when it is retained in water ice. In this work, we show how not only water is able to retain CO but CO_2, in solid state, is also able to do it. In fact, CO_2 even retains CO up to the sublimation temperature of CO_2, which is 70 degrees above the CO sublimation temperature. This fact is very relevant since in many astrophysical environments, the presence of CO implies the presence of CO_2, since CO_2 could produce CO by irradiation as many groups have demonstrated.

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