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Strazzulla, G. und Moroz, L. (2005) Ion irradiation of asphaltite as an analogue for solid hydrocarbons in the interstellar medium. Astronomy and Astrophysics, 434, Seiten 593-598.
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Kurzfassung
We present the results of experiments of low temperature ion irradiation of pure asphaltite samples and those covered with water ice layers. Asphaltite (a natural bitumen) was used as an analogue of carbonaceous interstellar grains on which water-rich icy mantles can be formed in the dense and cold phases of the interstellar medium. We simulated irradiation by cosmic ions in the laboratory to study, by in situ infrared spectroscopy, the formation of molecular species in the asphaltite samples and at the interface between the refractory solid (asphaltite) and the water ice mantle. New molecular species were formed at the expense of water molecules and atoms (mainly carbon and hydrogen) from the asphaltite substrate. The vibration modes we detected at low temperature (16 K) include: C-H stretch (carbynoids), C-H asymmetric stretch (acetylene), C-H aromatic stretch, C=O stretch in CO<sub>2</sub>, C≡O stretch in CO, and C≡C stretch (carbynoids). Some of these species remain stable after warming of the irradiated samples to room temperature.
| Dokumentart: | Zeitschriftenbeitrag | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Titel: | Ion irradiation of asphaltite as an analogue for solid hydrocarbons in the interstellar medium | |||||||||
| Autoren: |
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| Datum: | 2005 | |||||||||
| Erschienen in: | Astronomy and Astrophysics | |||||||||
| Referierte Publikation: | Ja | |||||||||
| In Open Access: | Nein | |||||||||
| In SCOPUS: | Nein | |||||||||
| In ISI Web of Science: | Ja | |||||||||
| Band: | 434 | |||||||||
| Seitenbereich: | Seiten 593-598 | |||||||||
| Status: | veröffentlicht | |||||||||
| Stichwörter: | astrochemistry, dust, extinction, ISM, molecules, laboratory, spectroscopy | |||||||||
| HGF - Forschungsbereich: | Verkehr und Weltraum (alt) | |||||||||
| HGF - Programm: | Weltraum (alt) | |||||||||
| HGF - Programmthema: | W EW - Erforschung des Weltraums | |||||||||
| DLR - Schwerpunkt: | Weltraum | |||||||||
| DLR - Forschungsgebiet: | W EW - Erforschung des Weltraums | |||||||||
| DLR - Teilgebiet (Projekt, Vorhaben): | W - keine Zuordnung (alt) | |||||||||
| Standort: | Berlin-Adlershof | |||||||||
| Institute & Einrichtungen: | Institut für Planetenforschung > Planetenphysik | |||||||||
| Hinterlegt von: | Moroz, Dr. Liubov | |||||||||
| Hinterlegt am: | 15 Dez 2006 | |||||||||
| Letzte Änderung: | 27 Apr 2009 13:21 |
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