Journal ArticleDOI
Microwave spectra of molecules of astrophysical interest. XVI. Methyl formate
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In this article, the microwave spectrum of methyl formate is reviewed for information applicable to radio astronomy, based on new laboratory measurements in the frequency range from 8 GHz to 58 GHz.Abstract:
The microwave spectrum of methyl formate is critically reviewed for information applicable to radio astronomy. The review is based on new laboratory measurements in the frequency range from 8 GHz to 58 GHz. Molecular data such as the derived rotational constants, centrifugal distortion parameters, internal rotation parameters, electric dipole moment and molecular structure are tabulated. Since the primary objective is to provide microwave spectral transitions applicable to radio astronomy observations, the review encompasses only the ground state rotational spectrum of the most abundant isotopic form of methyl formate, H12C16O2CH3. While all measured transitions are included, the predicted transitions were limited to J?12 in the range of 900 MHz to 250 GHz.read more
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Journal ArticleDOI
Survey observations of c-C2H4O and CH3CHO toward massive star-forming regions
M Ikeda,Masatoshi Ohishi,A. Nummelin,J. E. Dickens,Per Bergman,Åke Hjalmarson,William M. Irvine +6 more
TL;DR: In this paper, the column densities and the rotational temperatures were derived using the rotation diagram method to clarify the formation mechanisms of ethylene oxide (cyclic-C2H4O) and its structural isomer acetaldehyde (CH3CHO).
Journal Article
Survey observations of c-C2H4O and CH3CHO toward massive star-forming regions (vol 560, pg 792, 2001)
TL;DR: In this paper, the column densities and the rotational temperatures were derived using the rotation diagram method for the formation mechanisms of ethylene oxide (cyclic-C2H4O) and its structural isomer acetaldehyde (CH3CHO).
Journal ArticleDOI
Formic Acid in Orion KL from 1 Millimeter Observations with the Berkeley-Illinois-Maryland Association Array
TL;DR: In this article, the Berkeley-Maryland-Illlinois Association array observations of formic acid (HCOOH) at 1 mm toward the Orion KL region were presented, indicating that HCOOH is located in a layer that delineates the interaction region between the outflow and the ambient quiescent gas.
Journal ArticleDOI
Observations of Formic Acid in Hot Molecular Cores
TL;DR: In this article, BIMA Array observations of formic acid (HCOOH) in Galactic hot molecular cores were presented, and the authors successfully mapped HCOOH emission in three regions: Orion KL, Sgr B2, and W51.
Journal ArticleDOI
Interstellar Isomers: The Importance of Bonding Energy Differences
Anthony J. Remijan,Anthony J. Remijan,Jan M. Hollis,Frank J. Lovas,David F. Plusquellic,Philip R. Jewell +5 more
TL;DR: In this article, strong detections of methyl cyanide (CH3CN), vinyl cyanide, CH2CHCN, CH3CH2CN and HC4CN with the Green Bank Telescope (GBT) toward the Sgr B2(N) molecular cloud were reported.