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  An investigation of spectral line stacking techniques and application to the detection of HC11N

Loomis, R. A., Burkhardt, A. M., Shingledecker, C. N., Charnley, S. B., Cordiner, M. A., Herbst, E., et al. (2021). An investigation of spectral line stacking techniques and application to the detection of HC11N. Nature Astronomy, 2021(5), 188-196. doi:10.1038/s41550-020-01261-4.

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Loomis, Ryan A., Author
Burkhardt, Andrew M., Author
Shingledecker, Christopher N.1, Author              
Charnley, Steven B., Author
Cordiner, Martin A., Author
Herbst, Eric, Author
Kalenskii, Sergei, Author
Lee, Kin Long Kelvin, Author
Willis, Eric R., Author
Xue, Ci, Author
Remijan, Anthony J., Author
McCarthy, Michael C., Author
McGuire, Brett A., 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: As the inventory of interstellar molecules continues to grow, the gulf between small species, whose individual rotational lines can be observed with radio telescopes, and large ones, such as polycyclic aromatic hydrocarbons best studied in bulk via infrared and optical observations, is slowly being bridged. Understanding the connection between these two molecular reservoirs is critical to understanding the interstellar carbon cycle, but will require pushing the boundaries of how far we can probe molecular complexity while still retaining observational specificity. Towards this end, we present a method for detecting and characterizing new molecular species in single-dish observations towards sources with sparse line spectra. We have applied this method to data from the ongoing GOTHAM (GBT Observations of TMC-1: Hunting Aromatic Molecules) Green Bank Telescope large programme, discovering six new interstellar species. Here we highlight the detection of HC11N, the largest cyanopolyyne in the interstellar medium.

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Language(s): eng - English
 Dates: 2021-01-11
 Publication Status: Published online
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 Identifiers: DOI: 10.1038/s41550-020-01261-4
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Title: Nature Astronomy
Source Genre: Journal
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Publ. Info: London : Springer Nature
Pages: - Volume / Issue: 2021 (5) Sequence Number: - Start / End Page: 188 - 196 Identifier: Other: 2397-3366
CoNE: https://pure.mpg.de/cone/journals/resource/2397-3366