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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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

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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

Cite this

Snyder, L. E., Lovas, F. J., Mehringer, D. M., Miao, N. Y., Kuan, Y. J., Hollis, J. M., & Jewell, P. R. (2002). Confirmation of interstellar acetone. Astrophysical Journal, 578(1 I), 245-255. https://doi.org/10.1086/342273