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

doi:10.1086/342273

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

^*Corresponding author for this work

Department of Earth Sciences (Include Institute of Marine Environmental Science and Technology)

Research output: Contribution to journal › Article › peer-review

93 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 〈N_T〉 = 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 language	English
Pages (from-to)	245-255
Number of pages	11
Journal	Astrophysical Journal
Volume	578
Issue number	1 I
DOIs	https://doi.org/10.1086/342273
Publication status	Published - 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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@article{416123d74eae4d64b0d35635bead99da,

title = "Confirmation of interstellar acetone",

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.",

keywords = "ISM: abundances, ISM: clouds, ISM: individual (Sagittarius B2(N-LMH)), ISM: molecules, Radio lines: ISM",

author = "Snyder, {Lewis E.} and Lovas, {F. J.} and Mehringer, {David M.} and Miao, {Nina Yanti} and Kuan, {Yi Jehng} and Hollis, {J. M.} and Jewell, {P. R.}",

year = "2002",

month = oct,

day = "10",

doi = "10.1086/342273",

language = "English",

volume = "578",

pages = "245--255",

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TY - JOUR

T1 - Confirmation of interstellar acetone

AU - Snyder, Lewis E.

AU - Lovas, F. J.

AU - Mehringer, David M.

AU - Miao, Nina Yanti

AU - Kuan, Yi Jehng

AU - Hollis, J. M.

AU - Jewell, P. R.

PY - 2002/10/10

Y1 - 2002/10/10

N2 - 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.

AB - 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.

KW - ISM: abundances

KW - ISM: clouds

KW - ISM: individual (Sagittarius B2(N-LMH))

KW - ISM: molecules

KW - Radio lines: ISM

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UR - http://www.scopus.com/inward/citedby.url?scp=0037737199&partnerID=8YFLogxK

U2 - 10.1086/342273

DO - 10.1086/342273

M3 - Article

AN - SCOPUS:0037737199

SN - 0004-637X

VL - 578

SP - 245

EP - 255

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 I

ER -

Confirmation of interstellar acetone

Abstract

Keywords

ASJC Scopus subject areas

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