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Detection and Confirmation of Interstellar Acetic Acid

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Title:
Detection and Confirmation of Interstellar Acetic Acid Authors:
Mehringer, David M.; Snyder, Lewis E.; Miao, Yanti; Lovas, Frank J. Affiliation:
AA(Department of Astronomy, University of Illinois, 1002 W. Green Street, Urbana, IL 61801; , , ; Current address: California Institute of Technology, Downs Laboratory of Physics, MC 320-47, Pasadena, CA 91125.), AB(Department of Astronomy, University of Illinois, 1002 W. Green Street, Urbana, IL 61801; , , ), AC(Department of Astronomy, University of Illinois, 1002 W. Green Street, Urbana, IL 61801; , , ), AD(Optical Technology Division, National Institute of Standards and Technology, Gaithersburg, MD 20899) Publication:
The Astrophysical Journal, Volume 480, Issue 1, pp. L71-L74. (ApJL Homepage) Publication Date:
05/1997 Origin:
APJ; UCP Astronomy Keywords:
ISM: ABUNDANCES, ISM: CLOUDS, ISM: INDIVIDUAL NAME: SAGITTARIUS B2(LMH), ISM: MOLECULES, RADIO LINES: ISM, ISM: Abundances, ISM: Clouds, ISM: individual (Sagittarius B2[LMH]), ISM: Molecules, Radio Lines: ISM Abstract Copyright:
(c) 1997: The American Astronomical Society DOI:
10.1086/310612 Bibliographic Code:
1997ApJ...480L..71M

Abstract

We have detected acetic acid (CH3COOH) in the Sgr B2 Large Molecule Heimat source using the Berkeley-Illinois-Maryland Association (BIMA) Array and the Caltech Owens Valley Radio Observatory (OVRO) Millimeter Array. With the BIMA array, we initially detected the 8*,8-7*,72 A blend near 90.2 GHz. The corresponding line from the E symmetry species was sought but may be blended with a line from another species. Interstellar CH3COOH was confirmed using the OVRO array, with which we detected the 9*,9-8*,8 E blend near 100.9 GHz. The corresponding line from the A symmetry species was sought but was found to be blended with the 71-70 E line of CH3SH. Our CH3COOH observations represent the first detection and confirmation of an interstellar molecule using interferometric arrays; all past detections and confirmations of new molecules have been made on the basis of single-element telescope observations.
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