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

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    72 引文 斯高帕斯(Scopus)

    摘要

    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.

    原文英語
    頁(從 - 到)245-255
    頁數11
    期刊Astrophysical Journal
    578
    發行號1 I
    DOIs
    出版狀態已發佈 - 2002 十月 10

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

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