Results 21 to 30 of about 2,302 (180)

Chemie im interstellaren Raum

CHIMIA, 1977
The parameters of the interstellar chemistry have been discussed: the cosmic abundance of elements, the mass and density of the gaseous component in the interstellar space, the temperature, the source of free energy, the stability of the molecules in ...
M. Taube
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Unraveling sulfur chemistry in interstellar carbon oxide ices

Nature Communications, 2022
The authors report photolytic H atom transfer reactions of HOSO• in astronomical CO & CO2 ices, forming reactive acyl radicals & molecular complexes with SO & SO2.
Xiaolong Li, Bo Lu, Lina Wang, Junfei Xue, Bifeng Zhu, Tarek Trabelsi, Joseph S. Francisco, Xiaoqing Zeng   +7 more
doaj   +1 more source

Systems Astrochemistry: A New Doctrine for Experimental Studies

Frontiers in Astronomy and Space Sciences, 2021
Laboratory experiments play a key role in deciphering the chemistry of the interstellar medium (ISM) and the formation of complex organic molecules (COMs) relevant to life.
Nigel J. Mason, Perry A. Hailey, Duncan V. Mifsud, Duncan V. Mifsud, James S. Urquhart   +4 more
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Interstellar Chemistry: Radiation, Dust and Metals [PDF]

Proceedings of the International Astronomical Union, 2008
AbstractAn overview is given of the chemical processes that occur in primordial systems under the influence of radiation, metal abundances and dust surface reactions. It is found that radiative feedback effects differ for UV and X-ray photons at any metallicity, with molecules surviving quite well under irradiation by X-rays.
openaire   +2 more sources

Open problems and perspectives offered by current and future instruments

EPJ Web of Conferences, 2012
We summarize recent observational and theoretical results and discuss the open challenges for astrochemistry and the promises offered by the current and upcoming instruments. Some of the main challenges are listed below. Characterization of the structure
Gérin M.
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THE 2014 KIDA NETWORK FOR INTERSTELLAR CHEMISTRY [PDF]

The Astrophysical Journal Supplement Series, 2015
Accepted for publication in ApJS on February 26th ...
Wakelam, V., Loison, J.-C., Herbst, Eric, Pavone, B., Bergeat, Astrid, Béroff, K., Chabot, M., Faure, A., Galli, D., Geppert, W., Gerlich, D., Gratier, P., Harada, N., Hickson, K., Honvault, P., Klippenstein, S., Le Picard, S., Nyman, G., Ruaud, M., Schlemmer, S., Sims, I., Talbi, D., Tennyson, J., Wester, R.   +23 more
openaire   +4 more sources

Time-resolved relaxation and fragmentation of polycyclic aromatic hydrocarbons investigated in the ultrafast XUV-IR regime

Nature Communications, 2021
Polycyclic aromatic hydrocarbons play an important role in interstellar chemistry, where interaction with high energy photons can induce ionization and fragmentation reactions.
J. W. L. Lee, D. S. Tikhonov, P. Chopra, S. Maclot, A. L. Steber, S. Gruet, F. Allum, R. Boll, X. Cheng, S. Düsterer, B. Erk, D. Garg, L. He, D. Heathcote, M. Johny, M. M. Kazemi, H. Köckert, J. Lahl, A. K. Lemmens, D. Loru, R. Mason, E. Müller, T. Mullins, P. Olshin, C. Passow, J. Peschel, D. Ramm, D. Rompotis, N. Schirmel, S. Trippel, J. Wiese, F. Ziaee, S. Bari, M. Burt, J. Küpper, A. M. Rijs, D. Rolles, S. Techert, P. Eng-Johnsson, M. Brouard, C. Vallance, B. Manschwetus, M. Schnell   +42 more
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Multi-line Observations, Models, and Data Needed to Understand the Nature of UV-irradiated Interstellar Matter [PDF]

EPJ Web of Conferences, 2022
Far-ultraviolet photons from OB-type massive stars regulate the heating, ionization, and chemistry of much of the neutral interstellar gas in star-forming galaxies.
Goicoechea Javier R., Cuadrado Sara, Le Petit Franck   +2 more
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Interstellar oxygen chemistry [PDF]

Astronomy & Astrophysics, 2001
We present results of chemical models for a variety of types of regions shown by SWAS observations to contain less O2 and H2O than previously expected. We identify time-dependent models for which O2 and H2O abundances meet the SWAS constraints and for which calculated abundances of other species are in harmony with measurements made primarily at ...
S. Viti, E. Roueff, T. W. Hartquist, null G. Pineau des Forêts, D. A. Williams   +4 more
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Unusual Chemical Processes in Interstellar Chemistry: Past and Present

Frontiers in Astronomy and Space Sciences, 2021
The chemistry that occurs in interstellar clouds consists of both gas-phase processes and reactions on the surfaces of dust grains, the latter particularly on and in water-dominated ice mantles in cold clouds.
Eric Herbst, Eric Herbst
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