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Tytuł:
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A Search for Heterocycles in GOTHAM Observations of TMC-1.
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Autorzy:
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Barnum TJ; Department of Chemistry, Union College, Schenectady, New York 12308, United States.
Siebert MA; Department of Astronomy, University of Virginia, Charlottesville, Virginia 22904, United States.
Lee KLK; Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.
Loomis RA; National Radio Astronomy Observatory, Charlottesville, Virginia 22903, United States.
Changala PB; Center for Astrophysics | Harvard & Smithsonian, Cambridge, Massachusetts 02138, United States.
Charnley SB; Astrochemistry Laboratory and the Goddard Center for Astrobiology, NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, United States.
Sita ML; Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States.
Xue C; Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.
Remijan AJ; National Radio Astronomy Observatory, Charlottesville, Virginia 22903, United States.
Burkhardt AM; Department of Physics, Wellesley College, 106 Central Street, Wellesley, Massachusetts 02481, United States.
McGuire BA; Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.; National Radio Astronomy Observatory, Charlottesville, Virginia 22903, United States.; Center for Astrophysics | Harvard & Smithsonian, Cambridge, Massachusetts 02138, United States.
Cooke IR; Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada.
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Źródło:
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The journal of physical chemistry. A [J Phys Chem A] 2022 May 05; Vol. 126 (17), pp. 2716-2728. Date of Electronic Publication: 2022 Apr 20.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Original Publication: Washington, D.C. : American Chemical Society, c1997-
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MeSH Terms:
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Astronomy*
Extraterrestrial Environment*
Monte Carlo Method ; Oxygen/chemistry ; Sulfur
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Substance Nomenclature:
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70FD1KFU70 (Sulfur)
S88TT14065 (Oxygen)
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Entry Date(s):
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Date Created: 20220420 Date Completed: 20220506 Latest Revision: 20220506
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Update Code:
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20240104
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DOI:
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10.1021/acs.jpca.2c01435
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PMID:
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35442689
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We have conducted an extensive search for nitrogen-, oxygen-, and sulfur-bearing heterocycles toward Taurus Molecular Cloud 1 (TMC-1) using the deep, broadband centimeter-wavelength spectral line survey of the region from the GOTHAM large project on the Green Bank Telescope. Despite their ubiquity in terrestrial chemistry, and the confirmed presence of a number of cyclic and polycyclic hydrocarbon species in the source, we find no evidence for the presence of any heterocyclic species. Here, we report the derived upper limits on the column densities of these molecules obtained by Markov Chain Monte Carlo (MCMC) analysis and compare this approach to traditional single-line upper limit measurements. We further hypothesize why these molecules are absent in our data, how they might form in interstellar space, and the nature of observations that would be needed to secure their detection.
