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Author Moore, Marla H. ♦ Hudson, Reggie L.
Source CiteSeerX
Content type Text
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Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Complex Molecule ♦ Astrophysical Ice ♦ Solid-phase Synthesis ♦ Rmly-identied Cometary Molecule ♦ Goddard Space Flight Center ♦ Comet Hale-bopp ♦ Interstellar Ice ♦ Laboratory Experiment ♦ Interstellar Medium ♦ Chemistry Provide Challenge ♦ Observed Organic ♦ Possible Initiator ♦ Icy Surface ♦ Interstellar Source ♦ Photo-and Radiation Chemistry ♦ Far-uv Photon ♦ Low-temperature Reaction ♦ Gas-phase Formation Pathway ♦ Interstellar Organic ♦ Solar System Molecule ♦ Solar System Object ♦ Cosmic Ice Lab ♦ Current Astrochemical Thought ♦ Grain Surface ♦ Solid-phase Formation ♦ Most-recent Work ♦ Cosmic Ray
Abstract Abstract. The inventory of interstellar and solar system molecules now numbers well over 100 species, including ions and molecules both charged and neutral. Gas-phase formation pathways for many of the observed organics are still uncertain, so that solid-phase syntheses are of interest. Low-temperature reactions are thought to occur within interstellar ices, on ice and grain surfaces in the interstellar medium, and on icy surfaces of solar system objects (e.g. Europa, Pluto). Ionizing radiation, such as cosmic rays, and far-UV photons are two possible initiators of such chemistry. In the Cosmic Ice Lab at NASA's Goddard Space Flight Center, we can study both the photo-and radiation chemistries of ices at 8- 300 K. Our most-recent work has been motivated by the detections of ethylene glycol, HOCH2CH2OH, in an interstellar source (Hollis, Lovas, Jewell, et al. 2002) and in comet Hale-Bopp (Crovisier, Bockelee-Morvan, Biver, et al. 2002). Ethylene glycol is currently the largest rmly-identied cometary molecule as well as one of the larger interstellar organics. This molecule's formation and accompanying chemistry provide challenges and tests for current astrochemical thought. Here we discuss laboratory experiments on ethylene glycol's solid-phase formation and de-
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Learning Resource Type Article