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Title: FORMATION OF HYDROXYLAMINE ON DUST GRAINS VIA AMMONIA OXIDATION

The quest to detect prebiotic molecules in space, notably amino acids, requires an understanding of the chemistry involving nitrogen atoms. Hydroxylamine (NH{sub 2}OH) is considered a precursor to the amino acid glycine. Although not yet detected, NH{sub 2}OH is considered a likely target of detection with ALMA. We report on an experimental investigation of the formation of hydroxylamine on an amorphous silicate surface via the oxidation of ammonia. The experimental data are then fed into a simulation of the formation of NH{sub 2}OH in dense cloud conditions. On ices at 14 K and with a modest activation energy barrier, NH{sub 2}OH is found to be formed with an abundance that never falls below a factor 10 with respect to NH{sub 3}. Suggestions of conditions for future observations are provided.
Authors:
;  [1] ;  [2] ;  [3]
  1. Physics Department, Syracuse University, Syracuse, NY 13244 (United States)
  2. Paris Observatory, F-75014 Paris (France)
  3. Center for Radiophysics and Space Research, Cornell University, Ithaca, NY 14853 (United States)
Publication Date:
OSTI Identifier:
22364538
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 799; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACTIVATION ENERGY; AMMONIA; ATOMS; COMPUTERIZED SIMULATION; COSMOCHEMISTRY; DETECTION; GLYCINE; HYDROXYLAMINE; ICE; MOLECULES; NITROGEN; OXIDATION; PRECURSOR; SILICATES; SPACE