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- W2052596987 abstract "view Abstract Citations (91) References (23) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS H 2 in Interstellar and Extragalactic Ices: Infrared Characteristics, Ultraviolet Production, and Implications Sandford, Scott A. ; Allamandola, Louis J. Abstract H2 is the most abundant molecule in the universe. We demonstrate that this molecule may be an important component of interstellar and possibly intergalactic ices, both because it can be formed in situ, within the ices, and because gas-phase H2 can freeze out onto dust grains in some astrophysical environments. The condensation-sublimation and infrared spectral properties of ices containing H2 are presented. We show that solid H2 in H2O-rich ices can be detected by an infrared absorption band at 4137/cm (2.417 microns). The surface binding energy of H2 to H2O ice was measured to be Delta-H(s)/k = 555 +/- 35 K. Surface binding energies can be used to calculate the residence times of H2 on grain surfaces as a function of temperature. Some of the implications of these results are considered. Publication: The Astrophysical Journal Pub Date: June 1993 DOI: 10.1086/186861 Bibcode: 1993ApJ...409L..65S Keywords: Hydrogen; Ice; Infrared Spectra; Interstellar Gas; Interstellar Matter; Molecular Clouds; Abundance; Photolysis; Astrophysics; INFRARED: INTERSTELLAR: LINES; ISM: MOLECULES; MOLECULAR PROCESSES full text sources ADS |" @default.
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- W2052596987 title "H2 in interstellar and extragalactic ices - Infrared characteristics, ultraviolet production, and implications" @default.
- W2052596987 doi "https://doi.org/10.1086/186861" @default.
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