Laboratory spectroscopy of theoretical ices: Predictions for JWST and test for astrochemical models
Электронный научный архив УРФУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
| Заглавие |
Laboratory spectroscopy of theoretical ices: Predictions for JWST and test for astrochemical models
|
|
| Автор |
Müller, B.
Giuliano, B. M. Vasyunin, A. Fedoseev, G. Caselli, P. |
|
| Тематика |
ASTROCHEMISTRY
INFRARED: ISM ISM: MOLECULES METHODS: LABORATORY: SOLID STATE TECHNIQUES: SPECTROSCOPIC FOURIER TRANSFORM INFRARED SPECTROSCOPY LABORATORIES MORPHOLOGY SPACE TELESCOPES SPECTROMETERS STARS STRUCTURE (COMPOSITION) ASTROCHEMISTRY CHEMICAL MODEL INFRARED: ISM INTERSTELLAR ICE ISM:MOLECULES JAMES WEBB SPACE TELESCOPE METHOD: LABORATORY: SOLID STATE METHODS:LABORATORY PRESTELLAR CORES TECHNIQUES: SPECTROSCOPIC ICE |
|
| Описание |
Context. The pre-stellar core L1544 has been the subject of several observations conducted in the past years, complemented by modelling studies focused on its gas and ice-grain chemistry. The chemical composition of the ice mantles reflects the environmental physical changes along the temporal evolution, such as density and temperature. The investigation outcome hints at a layered structure of interstellar ices with abundance of H2O in the inner layers and an increasing concentration of CO near the surface. The morphology of interstellar ice analogues can be investigated experimentally assuming a composition derived from chemical models. Aims. This research presents a new approach of a three-dimensional fit where observational results are first fitted with a gas-grain chemical model predicting the exact ice composition including infrared (IR) inactive species. Then the laboratory IR spectra are recorded for interstellar ice analogues whose compositions reflect the obtained numerical results, in a layered and in a mixed morphology. These results could then be compared with the results of James Webb Space Telescope (JWST) observations. Special attention is paid to the inclusion of IR inactive species whose presence is predicted in the ice, but is typically omitted in the laboratory obtained data. This stands for N2, one of the main possible constituents of interstellar ice mantles, and O2. Methods. Ice analogue spectra were recorded at a temperature of 10 K using a Fourier transform infrared spectrometer. In the case of layered ice we deposited a H2O-CO-N2-O2 mixture on top of a H2O-CH3OH-N2 ice, while in the case of mixed ice we examined a H2O-CH3OH-N2-CO composition. The selected species are the four most abundant ice components predicted by the chemical model. Results. Following the changing composition and structure of the ice, we find differences in the absorption bands for most of the examined vibrational modes. The extent of observed changes in the IR band profiles will allow us to analyse the structure of ice mantles in L1544 from future observations by the JWST. Conclusions. Our spectroscopic measurements of interstellar ice analogues predicted by our well-received gas-grain chemical codes of pre-stellar cores will allow detailed comparison with upcoming JWST observations. This is crucial in order to put stringent constraints on the chemical and physical structure of dust icy mantles just before the formation of stars and protoplanetary disks, and to explain surface chemistry. © 2022 EDP Sciences. All rights reserved.
Ludwig-Maximilians University Max-Planck-Gesellschaft, MPG Ministry of Science and Higher Education of the Russian Federation, (FEUZ-2020-0038) International Max Planck Research School for Advanced Methods in Process and Systems Engineering, IMPRS We thank Christian Deysenroth for the designing and development of the experimental set-up and the continuous assistance in the laboratory development. The work of Birgitta Müller was supported by the IMPRS on Astrophysics at the Ludwig-Maximilians University, as well as by the funding the IMPRS receives from the Max-Planck Society. Work by Anton Vasyunin is supported by the Russian Ministry of Science and Higher Education via the State Assignment Contract FEUZ-2020-0038. Anton Vasyunin is a head of the Max Planck Partner Group at the Ural Federal University. |
|
| Дата |
2024-04-08T11:06:07Z
2024-04-08T11:06:07Z 2022 |
|
| Тип |
Article
Journal article (info:eu-repo/semantics/article) Published version (info:eu-repo/semantics/publishedVersion) |
|
| Идентификатор |
Müller, B, Giuliano, BM, Vasyunin, A, Fedoseev, G & Caselli, P 2022, 'Laboratory spectroscopy of theoretical ices: Predictions for JWST and test for astrochemical models', Astronomy and Astrophysics, Том. 668, A46. https://doi.org/10.1051/0004-6361/202243248
Müller, B., Giuliano, B. M., Vasyunin, A., Fedoseev, G., & Caselli, P. (2022). Laboratory spectroscopy of theoretical ices: Predictions for JWST and test for astrochemical models. Astronomy and Astrophysics, 668, [A46]. https://doi.org/10.1051/0004-6361/202243248 0004-6361 Final All Open Access; Green Open Access; Hybrid Gold Open Access https://www.aanda.org/articles/aa/pdf/2022/12/aa43248-22.pdf https://www.aanda.org/articles/aa/pdf/2022/12/aa43248-22.pdf http://elar.urfu.ru/handle/10995/131280 10.1051/0004-6361/202243248 85145254222 000896303600011 |
|
| Язык |
en
|
|
| Права |
Open access (info:eu-repo/semantics/openAccess)
cc-by https://creativecommons.org/licenses/by/4.0/ |
|
| Формат |
application/pdf
|
|
| Издатель |
EDP Sciences
|
|
| Источник |
Astronomy & Astrophysics
Astronomy and Astrophysics |
|