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  Modeling C-shock chemistry in isolated molecular outflows

Burkhardt, A. M., Shingledecker, C. N., Le Gal, R., McGuire, B. A., Remijan, A. J., & Herbst, E. (2020). Modeling C-shock chemistry in isolated molecular outflows. The Astrophysical Journal, 881(1): 32. doi:10.3847/1538-4357/ab2be8.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-5DBA-1 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-5DBB-0
Genre: Journal Article

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Modeling C-shock Chemistry in Isolated Molecular Outflows.pdf (Any fulltext), 2MB
 
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Burkhardt, Andrew M., Author
Shingledecker, Christopher N.1, Author              
Le Gal, Romane, Author
McGuire, Brett A., Author
Remijan, Anthony J., Author
Herbst, Eric, Author
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1Center for Astrochemical Studies at MPE, MPI for Extraterrestrial Physics, Max Planck Society, ou_1950287              

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 Abstract: Shocks are a crucial probe for understanding the ongoing chemistry within ices on interstellar dust grains, where many complex organic molecules (COMs) are believed to be formed. However, previous work has been limited to the initial liberation into the gas phase through nonthermal desorption processes such as sputtering. Here we present results from the adapted three-phase gas-grain chemical network code nautilus, with the inclusion of additional high-temperature reactions, nonthermal desorption, collisional dust heating, and shock physics parameters. This enhanced model is capable of reproducing many of the molecular distributions and abundance ratios seen in our prior observations of the prototypical shocked outflow L1157. In addition, we find that, among others, NH2CHO, HCOOCH3, and CH3CHO have significant post-shock chemistry formation routes that differ from those of many other COMs observed in shocks. Finally, a number of selected species and phenomena are studied here with respect to their usefulness as shock tracers in various astrophysical sources.

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 Dates: 2020-08-09
 Publication Status: Published online
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 Identifiers: DOI: 10.3847/1538-4357/ab2be8
Other: LOCALID: 3228425
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Title: The Astrophysical Journal
Source Genre: Journal
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Publ. Info: Bristol; Vienna : IOP Publishing; IAEA
Pages: - Volume / Issue: 881 (1) Sequence Number: 32 Start / End Page: - Identifier: ISSN: 0004-637X
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215_3