期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 765, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/765/1/L10
关键词
catalogs; ISM: abundances; ISM: individual objects (SgrB2N); ISM: molecules; methods: laboratory; surveys
资金
- NSF Centers for Chemical Innovation [CHE-0847919]
- NSF Chemistry [CHE-1213200]
- Virginia-North Carolina Alliance, a NSF Louis Stokes Alliance for Minority Participation [HRD-1202181]
- National Radio Astronomy Observatory
- Direct For Education and Human Resources
- Division Of Human Resource Development [1202181] Funding Source: National Science Foundation
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1213200] Funding Source: National Science Foundation
The detection of E-cyanomethanimine (E-HNCHCN) toward Sagittarius B2(N) is made by comparing the publicly available Green Bank Telescope (GBT) PRIMOS survey spectra to laboratory rotational spectra from a reaction product screening experiment. The experiment uses broadband molecular rotational spectroscopy to monitor the reaction products produced in an electric discharge source using a gas mixture of NH3 and CH3CN. Several transition frequency coincidences between the reaction product screening spectra and previously unassigned interstellar rotational transitions in the PRIMOS survey have been assigned to E-cyanomethanimine. A total of eight molecular rotational transitions of this molecule between 9 and 50 GHz are observed with the GBT. E-cyanomethanimine, often called the HCN dimer, is an important molecule in prebiotic chemistry because it is a chemical intermediate in proposed synthetic routes of adenine, one of the two purine nucleobases found in DNA and RNA. New analyses of the rotational spectra of both E-cyanomethanimine and Z-cyanomethanimine that incorporate previous millimeter-wave measurements are also reported.
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