Confirmation of interstellar acetone

Lewis E. Snyder, F. J. Lovas, David M. Mehringer, Nina Yanti Miao, Yi Jehng Kuan, J. M. Hollis, P. R. Jewell

    Research output: Contribution to journalArticlepeer-review

    76 Citations (Scopus)

    Abstract

    We present new observations of interstellar acetone [(CH3) 2CO] from both the NRAO 12 m and the BIMA array. We report NRAO 12 m detections of 13 new acetone emission features that can be assigned to 20 acetone transitions. These assignments are based on the measured and calculated frequencies in 2002 of Groner and coworkers, and they confirm the interstellar acetone identification in 1987 by Combes and co-workers. In addition, our BIMA array observations show that acetone emission is concentrated in the vicinity of the hot molecular core Sgr B2 (N-LMH). The beam-averaged column density for acetone is 〈NT〉 = 2.9(3) × 1016 cm -2. This value is consistent with the 1990 conclusions of Herbst, Giles, & Smith that the observed acetone abundance is too high to be explained by gas-phase synthesis reactions.

    Original languageEnglish
    Pages (from-to)245-255
    Number of pages11
    JournalAstrophysical Journal
    Volume578
    Issue number1 I
    DOIs
    Publication statusPublished - 2002 Oct 10

    Keywords

    • ISM: abundances
    • ISM: clouds
    • ISM: individual (Sagittarius B2(N-LMH))
    • ISM: molecules
    • Radio lines: ISM

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

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