The complex organic molecular content in the L1517B starless core
Электронный научный архив УРФУ
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The complex organic molecular content in the L1517B starless core
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| Автор |
Megías, A.
Jimenez-Serra, I. Martín-Pintado, J. Vasyunin, A. I. Spezzano, S. Caselli, P. Cosentino, G. Viti, S. |
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| Тематика |
ASTROCHEMISTRY
ISM: ABUNDANCES ISM: MOLECULES METHANOL ASTROCHEMISTRY CHEMICAL COMPLEXITY CHEMICAL EVOLUTION COMPLEX ORGANIC MOLECULES COMPLEX ORGANICS GAS-PHASES INTERMEDIATE DENSITIES ISM: ABUNDANCE ISM:MOLECULES PRESTELLAR CORES MOLECULES |
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| Описание |
Recent observations of the pre-stellar core L1544 and the younger starless core L1498 have revealed that complex organic molecules (COMs) are enhanced in the gas phase towards their outer and intermediate-density shells. Our goal is to determine the level of chemical complexity towards the starless core L1517B, which seems younger than L1498, and compare it with the other two previously studied cores to see if there is a chemical evolution within the cores. We have carried out 3 mm high-sensitivity observations towards two positions in the L1517B starless core: the core's centre and the position where the methanol emission peaks (at a distance of ∼5000 au from the core's centre). Our observations reveal that a lower number of COMs and COM precursors are detected in L1517B with respect to L1498 and L1544, and also show lower abundances. Besides methanol, we only detected CH3O, H2CCO, CH3CHO, CH3CN, CH3NC, HCCCN, and HCCNC. Their measured abundances are ∼3 times larger towards the methanol peak than towards the core's centre, mimicking the behaviour found towards the more evolved cores L1544 and L1498. We propose that the differences in the chemical complexity observed between the three studied starless cores are a consequence of their evolution, with L1517B being the less evolved one, followed by L1498 and L1544. Chemical complexity in these cores seems to increase over time, with N-bearing molecules forming first and O-bearing COMs forming at a later stage as a result of the catastrophic depletion of CO. © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.
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| Дата |
2024-04-05T16:22:08Z
2024-04-05T16:22:08Z 2022 |
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| Тип |
Article
Journal article (info:eu-repo/semantics/article) |info:eu-repo/semantics/publishedVersion |
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| Идентификатор |
Megías, A, Jiménez-Serra, I, Martín-Pintado, J, Vasyunin, AI, Spezzano, S, Caselli, P, Cosentino, G & Viti, S 2022, 'The complex organic molecular content in the L1517B starless core', Monthly Notices of the Royal Astronomical Society, vol. 519, no. 2, pp. 1601-1617. https://doi.org/10.1093/mnras/stac3449
Megías, A., Jiménez-Serra, I., Martín-Pintado, J., Vasyunin, A. I., Spezzano, S., Caselli, P., Cosentino, G., & Viti, S. (2022). The complex organic molecular content in the L1517B starless core. Monthly Notices of the Royal Astronomical Society, 519(2), 1601-1617. https://doi.org/10.1093/mnras/stac3449 0035-8711 Final All Open Access, Green https://www.scopus.com/inward/record.uri?eid=2-s2.0-85159267224&doi=10.1093%2fmnras%2fstac3449&partnerID=40&md5=f2edb1069133e32883f70e30d1b7b0c6 https://research.chalmers.se/publication/535093/file/535093_Fulltext.pdf http://elar.urfu.ru/handle/10995/130480 10.1093/mnras/stac3449 85159267224 000913810500001 |
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| Язык |
en
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| Права |
Open access (info:eu-repo/semantics/openAccess)
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application/pdf
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| Издатель |
Oxford University Press
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| Источник |
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society |
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