NO ICE HYDROGENATION: A SOLID PATHWAY TO NH2OH FORMATION IN SPACE

Emanuele Congiu, Gleb Fedoseev, Sergio Ioppolo, François Dulieu, Henda Chaabouni, Saoud Baouche, Jean Louis Lemaire, Carine Laffon, Philippe Parent, Thanja Lamberts, Herma M. Cuppen, Harold Linnartz
2012 Astrophysical Journal Letters  
Icy dust grains in space act as catalytic surfaces onto which complex molecules form. These molecules are synthesized through exothermic reactions from precursor radicals and, mostly, hydrogen atom additions. Among the resulting products are species of biological relevance, such as hydroxylamine-NH 2 OH-a precursor molecule in the formation of amino acids. In this Letter, laboratory experiments are described that demonstrate NH 2 OH formation in interstellar ice analogs for astronomically
more » ... stronomically relevant temperatures via successive hydrogenation reactions of solid nitric oxide (NO). Inclusion of the experimental results in an astrochemical gas-grain model proves the importance of a solid-state NO + H reaction channel as a starting point for prebiotic species in dark interstellar clouds and adds a new perspective to the way molecules of biological importance may form in space.
doi:10.1088/2041-8205/750/1/l12 fatcat:sryud2adx5e47mojwvaacleexe