Confirmation of Interstellar Acetone

Published

October 1, 2002

Author(s)

Lewis E. Snyder, Francis J. Lovas, David Mehringer, Nina Yanti Miao, Y J. Kuan, J M. Hollis

Abstract

We present new observations of interstellar acetone [(CH3)(2) CO] 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 coworkers. 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 [N-T] = 2.9(3) x 10(16) 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.

Citation

Astrophysical Journal

Volume

578

Issue

No. 1

Pub Type

Journals

Citation

Snyder, L. , Lovas, F. , Mehringer, D. , Yanti Miao, N. , Kuan, Y. and Hollis, J. (2002), Confirmation of Interstellar Acetone, Astrophysical Journal (Accessed June 7, 2025)