دورية أكاديمية
On the Origin of Infrared Bands Attributed to Tryptophan in Spitzer Observations of IC 348
| العنوان: | On the Origin of Infrared Bands Attributed to Tryptophan in Spitzer Observations of IC 348 |
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| المؤلفون: | Aditya Dhariwal, Thomas H. Speak, Linshan Zeng, Amirhossein Rashidi, Brendan Moore, Olivier Berné, Anthony J. Remijan, Ilane Schroetter, Brett A. McGuire, Víctor M. Rivilla, Arnaud Belloche, Jes K. Jørgensen, Pavle Djuricanin, Takamasa Momose, Ilsa R. Cooke |
| المصدر: | The Astrophysical Journal Letters, Vol 968, Iss 1, p L9 (2024) |
| بيانات النشر: | IOP Publishing, 2024. |
| سنة النشر: | 2024 |
| المجموعة: | LCC:Astrophysics |
| مصطلحات موضوعية: | Interstellar medium, Interstellar molecules, Astrochemistry, Laboratory astrophysics, Astrophysics, QB460-466 |
| الوصف: | Infrared emission features toward interstellar gas of the IC 348 star cluster in Perseus have been recently proposed to originate from the amino acid tryptophan. The assignment was based on laboratory infrared spectra of tryptophan pressed into pellets, a method which is known to cause large frequency shifts compared to the gas phase. We assess the validity of the assignment based on the original Spitzer data as well as new data from JWST. In addition, we report new spectra of tryptophan condensed in para-hydrogen matrices to compare with the observed spectra. The JWST MIRI data do not show evidence for tryptophan, despite deeper integration toward IC 348. In addition, we show that several of the lines attributed to tryptophan are likely due to instrumental artifacts. This, combined with the new laboratory data, allows us to conclude that there is no compelling evidence for the tryptophan assignment. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2041-8213 2041-8205 |
| العلاقة: | https://doaj.org/toc/2041-8205Test |
| DOI: | 10.3847/2041-8213/ad4d9a |
| الوصول الحر: | https://doaj.org/article/f77ede8fb9aa4120abc528ba76c38660Test |
| رقم الانضمام: | edsdoj.f77ede8fb9aa4120abc528ba76c38660 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 20418213 20418205 |
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| DOI: | 10.3847/2041-8213/ad4d9a |